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Journal articles on the topic 'Urvillei'

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Author: Grafiati
Published: 10 March 2023

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1

Taşar, Neslihan, Gülden Doğan, Yaşar Kiran, M. Oliur Rahman, and Uğur Çakilcioğlu. "Morphological, anatomical and cytological investigations on three taxa of Centaurea L. (Asteraceae) from Turkey." Bangladesh Journal of Plant Taxonomy 25, no. 2 (December 29, 2018): 215–26. http://dx.doi.org/10.3329/bjpt.v25i2.39527.

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Morphological, anatomical and cytological features of three Turkish taxa of Centaurea L., viz. C. polypodiifolia Boiss. var. polypodiifolia, C. urvillei DC. subsp. urvillei and C. urvillei subsp. armata Wagenitz were investigated. Stem anatomy revealed the presence of a thick cuticle layer outside the stem, and epidermis with dense hairs was observed in the lower part. Investigation on leaf anatomy showed that different types of hairs on the outside of the leaf were very intense. Palisade parenchyma was observed below the upper and lower epidermis. In Centaurea polypodiifolia var. polypodiifolia, chromosome number was found to be 2n=16, while in C. urvillei subsp. urvillei and C. urvillei subsp. armata 2n=20. Total karyotype length of C. polypodiifolia var. polypodiifolia, C. urvillei subsp. urvillei and C. urvillei subsp. armata was 22.9 µm, 37.84 µm and 40.01 µm, respectively. Among the investigated taxa the karyotype asymmetry index was found lowest in C. urvillei subsp. armata. Satellite was detected in C. urvillei subsp. urvillei and subsp. armata, while it was absent in C. polypodiifolia Boiss. var. polypodiifolia.
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2

Gülcemal, Derya, Özgen Alankuş-Çalışkan, Canan Karaalp, Ahmet Uygar Örs, Petek Ballar, and Erdal Bedir. "Phenolic Glycosides with antiproteasomal activity from Centaurea urvillei DC. subsp. urvillei." Carbohydrate Research 345, no. 17 (November 2010): 2529–33. http://dx.doi.org/10.1016/j.carres.2010.09.002.

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3

Quadros, Fernando Luiz Ferreira de, and Duilio Guerra Bandinelli. "Efeitos da adubação nitrogenada e de sistemas de manejo sobre a morfogênese de Lolium multiflorum Lam. e Paspalum urvillei Steud. em ambiente de várzea." Revista Brasileira de Zootecnia 34, no. 1 (February 2005): 44–53. http://dx.doi.org/10.1590/s1516-35982005000100006.

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Objetivou-se, com este experimento, avaliar a resposta morfogênica de Lolium multiflorum Lam. e Paspalum urvillei Steud., submetidos a níveis de adubação nitrogenada (100, 200 e 300 kg/ha de N). Os novilhos mantidos nesta pastagem recebiam diferentes níveis de suplementação energética (0,0; 0,4 e 0,8% do peso vivo), respectivamente, para os tratamentos de adubação. Adotou-se delineamento inteiramente casualizado, sendo avaliados 90 afilhos por tratamento, 45 de cada espécie por repetição. Foram utilizados afilhos marcados para avaliar as taxas de alongamento, aparecimento e desfolha e o filocrono de lâminas foliares das espécies. A suplementação propiciou efeito substitutivo para L. multiflorum, com menores taxas de desfolha no tratamento 300 kg/ha de N + 0,8% PV. Em P. urvillei, a taxa de desfolha foi elevada, independentemente de sua contribuição na massa de forragem. As maiores taxas de alongamento de L. multiflorum foram observadas com o uso de 300 kg/ha de N, o que induz à aplicação de maiores doses de N nos estádios iniciais. No período inicial, registrou-se a maior taxa de aparecimento de folhas no tratamento 100 kg/ha de N, com 12,5 dias para o aparecimento de nova folha. No segundo período, foram semelhantes e, no terceiro, o tratamento com 200 kg/ha de N apresentou a maior taxa, sendo necessários, em média, 14,1 dias para surgir nova folha. Com a aproximação do final do ciclo da espécie, a taxa de aparecimento diminuiu. A adubação nitrogenada não interfere no filocrono de ambas as espécies. A taxa de alongamento foliar de P. urvillei no tratamento com 300 kg/ha de N foi superior ao menor nível de N, em todos os períodos. A taxa média de aparecimento de folhas de P. urvillei foi de 0,07 folhas/dia. O intervalo médio para o aparecimento de nova folha foi de 14,1 dias, sendo influenciada principalmente pela soma térmica acumulada.
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4

Tekeli, Yener, Gokhan Zengin, Abdurrahman Aktumsek, Mehmet Sezgin, and Emrah Torlak. "Antibacterial activities of extracts from twelve Centaurea species from Turkey." Archives of Biological Sciences 63, no. 3 (2011): 685–90. http://dx.doi.org/10.2298/abs1103685t.

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Members of the genus Centaurea (Asteraceae) have been used in traditional plant-based medicine. The methanol extracts of twelve Centaurea species, of which five are endemic to Turkey flora, were screened for antibacterial activity against four bacteria (Escherichia coli, Bacillus cereus, Salmonella enteritidis, Staphylococcus aureus). The antibacterial activity was evaluated by the microdilution method and the minimum inhibition concentrations (MIC) of the extracts were determined. C. cariensis subsp. microlepis exhibited an antimicrobial effect on all tested microorganisms. The extracts from eight Centaurea species (C. balsamita, C. calolepis, C. cariensis subsp. maculiceps, C. cariensis subsp. microlepis, C. kotschyi var. kotschyi, C. solstitialis subsp. solstitialis, C. urvillei subsp. urvillei and C. virgata) possessed antibacterial activity against several of the tested microorganisms.
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5

Mai, Hoang Linh, Philippe Grellier, Elise Prost, Pascale Lemoine, Cyril Poullain, Vincent Dumontet, Brigitte Deguin, Thi Bach Hue Vo, Sylvie Michel, and Raphaël Grougnet. "Triterpenes from the exudate of Gardenia urvillei." Phytochemistry 122 (February 2016): 193–202. http://dx.doi.org/10.1016/j.phytochem.2015.11.001.

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6

Lopes, Rodrigo Ramos, and Lúcia Brandão Franke. "Produção de sementes de quatro ecótipos de Paspalum nativos do Rio Grande do Sul." Revista Brasileira de Zootecnia 40, no. 1 (January 2011): 20–30. http://dx.doi.org/10.1590/s1516-35982011000100004.

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O objetivo neste trabalho foi estudar os componentes da produção e da produção de sementes de duas espécies de Paspalum. Foram avaliados dois ecótipos de Paspalum notatum (André da Rocha; e Bagual) e dois de Paspalum urvillei (André da Rocha; e Eldorado do Sul). O delineamento experimental foi completamente casualizado, num esquema fatorial (ecótipos x dias após o plantio), com cinco repetições aninhadas dentro dos dias após o plantio. Cada espécie foi analisada separadamente para determinação dos componentes da produção e produção de sementes, realizada por amostragens semanais entre 7/11/2006 e 31/3/2007. Foram avaliadas as seguintes variáveis: número de perfilhos vegetativos; número de perfilhos reprodutivos/m²; porcentagem de perfilhos férteis; número de racemos/m²; peso de mil sementes; número de sementes/ inflorescência; número de sementes/racemo; e rendimento de sementes/área. A produção de sementes de Paspalum é prejudicada pelo longo período de florescimento e pela capacidade de retenção das sementes na inflorescência. A produção de sementes difere entre ecótipos, uma vez que os valores médios foram de 47,17 kg/ha (Paspalum notatum André da Rocha), 61,01 kg/ha (Paspalum notatum Bagual), 30,60 kg/ha (Paspalum urvillei André da Rocha) e 47,95 kg/ha (Paspalum urvillei Eldorado do Sul). A produção de sementes dessas espécies é altamente influenciada pelo número de perfilhos reprodutivos, pela porcentagem de perfilhos férteis e pelo peso de mil sementes.
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7

Scheffer-Basso, Simone Meredith, Gabriel Laner Rodrigues, and Marta Vanise Bordignon. "Caracterização Morfofisiológica e Anatômica de Paspalum urvillei (Steudel)." Revista Brasileira de Zootecnia 31, no. 4 (July 2002): 1674–79. http://dx.doi.org/10.1590/s1516-35982002000700009.

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Este trabalho foi conduzido com o objetivo de caracterizar a dinâmica de afilhamento e acúmulo de biomassa, a fenologia e os aspectos anatômicos de P. urvillei. O ensaio foi desenvolvido em Passo Fundo, Rio Grande do Sul, onde foram colhidas quinzenalmente seis plantas, em um delineamento completamente casualizado, entre 21/10/99 a 21/04/00. As épocas foram avaliadas por unidades de graus-dia (GD) de crescimento, por intermédio da soma das temperaturas médias diárias (temperatura basal = 0ºC). As características anatômicas de folha e colmo foram observadas por cortes histológicos à mão livre. O material foi corado com fucsina-azul de Astra e montado em glicerina, entre lâmina e lamínula. Observou-se um máximo de 70 afilhos/planta, sendo 60% basilares; a área foliar atingiu até 7066 cm²/planta, com 250 folhas verdes/planta. A altura do dossel vegetativo manteve-se em 50 cm. O florescimento foi precoce e longo, sugerindo a necessidade de manejo para encurtar tal estádio, a fim de prolongar o período de produção de folhas. Os estudos anatômicos comprovaram presença de células da bainha ao redor dos feixes vasculares, típico de plantas C4.
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8

Quadros, Fernando Luiz Ferreira de, Duilio Guerra Bandinelli, Aline Grohe Schirmer Pigatto, and Marta Gomes da Rocha. "Morfogênese de Lolium multiflorum Lam. e Paspalum urvillei steud sob níveis de adubação de fósforo e potássio." Ciência Rural 35, no. 1 (February 2005): 181–86. http://dx.doi.org/10.1590/s0103-84782005000100029.

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O estudo foi conduzido em área de várzea, com o objetivo de avaliar a resposta morfogênica de Lolium multiflorum e Paspalum urvillei, submetidos a níveis de adubação (50, 100 e 150% da recomendação) de fósforo (P) e potássio (K). Foram utilizados afilhos marcados para avaliar as taxas de alongamento e aparecimento de lâminas foliares e o filocrono. Os níveis de adubação afetaram (P<0,044) a taxa de alongamento de lâminas foliares de , no período de 03/08 a 17/08, com variação de 0,374 a 0,436mm GD-1 afilho-1, do menor ao maior nível de adubação. O intervalo para surgimento de folhas foi de 11,7 dias e o filocrono de 156 GD, na média dos tratamentos e períodos. Em P. urvillei, os níveis de adubação não afetaram a taxa de alongamento de lâminas foliares, sendo na média dos períodos e tratamentos de 0,375mm GD-1 afilho-1. Houve efeito dos níveis de adubação no aparecimento de folhas no período de 19/10 a 09/11, quando o nível de 100% da adubação, apresentou a maior taxa de alongamento de lâminas foliares, diferindo (P<0,003) dos demais. O filocrono foi maior (250 GD) no período de 04/01 a 24/01, nos demais (19/10 a 09/11 e 02/02 a 23/02) foi semelhante (166 e 175 GD, respectivamente). Os maiores níveis de adubação de P e K influenciam as taxas de alongamento em e de aparecimento de folhas em P. urvillei. Os valores de filocrono das espécies são semelhantes, demonstrando a potencialidade de crescimento e produção de forragem da espécie nativa principalmente.
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9

Jeffries, Matthew D., Travis W. Gannon, and Fred H. Yelverton. "Herbicide Inputs and Mowing Affect Vaseygrass (Paspalum urvillei) Control." Weed Technology 31, no. 1 (January 2017): 120–29. http://dx.doi.org/10.1614/wt-d-16-00072.1.

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Vaseygrass is an invasive, perennial C4-grass commonly found on roadsides in areas with poorly drained soils. Due to its upright growth habit and seedhead production, vaseygrass can impair motorist sightlines and subsequently, require increased management inputs to maintain vegetation at an acceptable height. Two field experiments were conducted from 2012 to 2015 on North Carolina roadsides to evaluate the effect of mowing and mowing timing with respect to applications of various herbicides on vaseygrass control. Both experiments evaluated clethodim (280 g ai ha–1), foramsulfuron+halosulfuron+thiencarbazone-methyl (44+69+22 g ai ha−1), imazapic (140 g ai ha−1), metsulfuron+nicosulfuron (16+59 g ai ha−1), and sulfosulfuron (105 g ai ha−1) with a nonionic surfactant at 0.25% v/v. Experiment one focused on the effect of mowing (routinely mowed or nonmowed) and herbicide application timing (fall-only, fall-plus-spring, or spring-only), while experiment two focused on pre-herbicide application mowing intervals (6, 4, 3, 2, 1, or 0 wk before treatment [WBT]). From experiment one, routine mowing reduced vaseygrass cover in nontreated plots 55% at 52 wk after fall treatment (WAFT), suggesting this cultural practice should be employed where possible. Additionally, routine mowing and herbicide application season affected herbicide efficacy. Treatments providing >70% vaseygrass cover reduction at 52 WAFT included routinely mowed fall-only clethodim and fall-plus-spring imazapic, and fall-plus-spring metsulfuron+nicosulfuron across mowing regimens. Within clethodim, mowing vaseygrass 2 or 1 WBT resulted in the lowest cover at 40 (1 to 2%) and 52 (4 to 6%) wk after treatment (WAT) compared to other intervals, which aligns with current label vegetation height at treatment recommendation. Vaseygrass persisted across all treatments evaluated through 52 WAT, suggesting eradication of this species will require inputs over multiple growing seasons.
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10

Sawasato, Joaquim Taizo, Miguel Dall'Agnol, Daniele Priscila da Conceição, Vilmar Tafernaberri Junior, and Gabriel Baracy Klafke. "Utilização de microssatélites e RAPD na caracterização molecular de acessos de Paspalum urvillei Steudel." Revista Brasileira de Zootecnia 37, no. 8 (August 2008): 1366–74. http://dx.doi.org/10.1590/s1516-35982008000800005.

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Este estudo foi realizado com o objetivo de verificar a diversidade genética na coleção de acessos de P. urvillei do Departamento de Plantas Forrageiras e Agrometeorologia (DPFA) da Faculdade de Agronomia (UFRG) visando sua utilização em futuros trabalhos de seleção. Foram avaliados 64 acessos provenientes do Rio Grande do Sul, 1 de Xanxerê, Santa Catarina, três de Curitiba, Paraná, e 1 da Argentina. A diversidade genética foi analisada por meio de marcadores do tipo RAPD e SSR. Utilizaram-se dez primers para marcadores RAPD, o que possibilitou obter 56 bandas polimórficas e 11 grupos no dendrograma com similaridade média de 0,70. Na técnica de SSR, foram utilizados sete primers e obtidas 28 bandas polimórficas, formando sete grupos no dendrograma com similaridade média de 0,66. Ambos os marcadores foram eficientes para o agrupamento de acessos coletados. O uso de maior número de primers para gerar mais bandas polimórficas foi necessário para obtenção de fingerprintsgenômicos dos indivíduos similares. Os dendrogramas gerados neste estudo dão subsídios para futuros cruzamentos de gerações parentais contrastantes ou similares no melhoramento de Paspalum urvillei.
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Sena, Flávio Henrique Silva de, Ignacio Aspiazú, Natanael Pereira da Silva, Renato Mendes de Oliveira, Karen Marcelle de Jesus Silva, Carlos Augusto Rodrigues Matrangolo, and Cleiton Fernando Barbosa Brito. "LEVANTAMENTO FITOSSOCIOLÓGICO DE PLANTAS DANINHAS EM POMARES DE MANGUEIRA NO SEMIÁRIDO MINEIRO." Nativa 7, no. 5 (September 12, 2019): 500. http://dx.doi.org/10.31413/nativa.v7i5.7170.

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Objetivou-se identificar as principais espécies de plantas daninhas em cultivo de mangueira aos dois e oito anos após plantio. O estudo foi desenvolvido em áreas irrigados de manga ‘Palmer’ localizadas em Janaúba-MG. Para estudo fitossociológico das plantas daninhas foi utilizado o método quadrado inventário (0,25 m2). Após classificação e quantificação das espécies, foi calculado calcularam-se a frequência (F), frequência relativa (Fr), densidade (D), densidade relativa (Dr), abundância (A), abundância relativa (Ar), índice de valor de importância (IVI), índice de valor de importância relativa (IVIr) e índice de similaridade. Na área com cultivo de mangueira em produção, após oito anos do plantio, foram encontradas 17 espécies, 14 gêneros e oito famílias, sendo Sida rhombifolia a principal espécie com IVIr de 27,8%. Já na área com dois anos de plantio encontrou-se menos espécies com destaque para Paspalum urvillei com IVIr de 70,61%. O índice de similaridade entre as duas áreas foi de 18,18%. Portanto, conclui-se que nas condições locais do cultivo de mangueira de Janaúba-MG, P. urvillei e S. rhombifolia são as principais espécies encontradas em pomares após dois e oito anos após implantação, respectivamente, e além disso, estes apresentam diferentes espécies infestantes comprovado pelo valor do índice de similaridade.Palavras-chave: fitossociologia; plantas daninhas; Mangifera indica. WEED PHYTOSOCIOLOGICAL SURVEY ON MANGO ORCHARDS IN THE MINAS GERAIS SEMIARID ABSTRACT: This study aimed to identify the main weed species in mango cultivation at two and eight years after planting. The study was developed in irrigated areas of 'Palmer' mango located in Janaúba-MG. For weed phytosociological study, the square inventory method (0.25 m2) was used. The frequency (F), relative frequency (Rf), density (D), relative density (Rd), abundance (A), relative abundance (Ra), value index of importance (VII), relative importance value index (RIVI) and similarity index were determined. In the area with mango cultivation in production, after eight years of planting, 17 species, 14 genera and eight families were found, being Sida rhombifolia the main species, with RIVI of 27.8%. In the area with two years of cultivation were found less species, with emphasis to Paspalum urvillei, with RIVI of 70.61%. The similarity index between the two areas was 18.18%. Therefore, it is concluded that in the local conditions of the cultivation of mango of Janaúba-MG, P. urvillei and S. rhombifolia are the main species found in orchards after two and eight years after implantation, respectively, and, in addition, both present different weed species, as proven by the low similarity index value.Keywords: phytosociology; weed; Mangifera indica.
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12

Bona, Mehmet. "Centaurea goksivriensis (Asteraceae), a new species from Turkey." Phytotaxa 203, no. 1 (March 19, 2015): 63. http://dx.doi.org/10.11646/phytotaxa.203.1.6.

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Centaurea goksivriensis M. Bona, a new species of C. sect. Acrocentron from Hatay Province of Turkey, is described and illustrated. It is morphologically similar to C. antiochia var. antiochia, C. carduiformis, and C. urvillei subsp. armata but differs mainly in its flower colour, indumentum and pappus. The IUCN conservation status of Critically Endangered (CR) should be applied to C. goksivriensis.
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13

EICHEMBERG, MAYRA T., and VERA L. SCATENA. "Morphology and anatomy of the diaspores and seedling of Paspalum (Poaceae, Poales)." Anais da Academia Brasileira de Ciências 85, no. 4 (September 25, 2013): 1389–96. http://dx.doi.org/10.1590/0001-3765201301112.

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ABSTRACT The knowledge regarding of the diaspore and post-seminal development of Paspalum L. is important for grassland biodiversity conservation, based on their representativeness and genetic improvement of forage. The morphology of the diaspore and the post-seminal development of Paspalum dilatatum Poir. (rhizomatous), P. mandiocanum Trin. var. subaequiglume Barreto (stoloniferous), P. pumilum Nees. (decumbent caespitose) and P. urvillei Steud. (erect caespitose) was described to distinguish species with different growth forms and to survey the characters useful for taxonomy. P. dilatatum differs by presenting oval diaspores larger than the others, with five prominent nerves and trichomes; P. urvillei presents diaspores with one central nerve that is more developed than the two lateral nerves and trichomes; P. mandiocanum var. subaequiglume presents diaspores with trichomes only in the margin; and P. pumilum differs by presenting glabrous diaspores. The caryopsis involves the seed that presents the differentiated embryo and disposed laterally, an elliptical hilum in all of the studied species and a rostellum in P. dilatatum and P. mandiocanum var. subaequiglume. The post-seminal development is similar in the four species and begins with germination that is marked by the emergence of the coleorhiza, followed by the coleoptile. These characteristics are common to other Poaceae previously studied, indicating a pattern to the family and do not distinguish the growth forms.
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Medeiros, Renato Borges de, and Nadilson Roberto Ferreira. "Controle de invasão biológica por capim-anonni em margem viária mediante a introdução de gramíneas." Revista Brasileira de Zootecnia 40, no. 2 (February 2011): 260–69. http://dx.doi.org/10.1590/s1516-35982011000200005.

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Objetivou-se avaliar o controle da invasão biológica por Eragrostis plana Nees (capim-anonni) em margens de rodovia com a introdução de gramíneas concorrentes associada a práticas de preparo do solo e adubação. O delineamento experimental foi em blocos casualizados com parcelas subdivididas e três repetições. Nas parcelas, foram avaliadas duas práticas de preparo do solo: solo subsolado e gradeado com aplicação de calcário e fósforo; e solo apenas subsolado, e nas subparcelas, as espécies de gramíneas: capim-mombaça (Megathyrsus maximus (Jacq.) B. K. Simon & S. W. L. Jacobs); capim-kazangula (Setaria sphacelata (Schumach.) Stapf & C. E. Hubb. ex M. B. Moss); mistura de sementes de três gramíneas nativas, grama-de-forquilha (Paspalum notatum Alain ex Flüggé), macega-do-banhado (Paspalum regnelli Mez) e capim-das-roças (Paspalum urvillei Steud.); avaliadas em comparação a uma subparcela de exclusão (testemunha). Nos levantamentos florísticos, realizados em 8 de janeiro de 2005, e após o plantio, em 26 de janeiro e 25 de junho de 2006, observou-se alta riqueza florística, com 86 espécies botânicas distribuídas em 29 famílias e 21% de espécies exóticas. O solo subsolado, gradeado, corrigido e adubado, associado às introduções de M. maximus e S. kazungula, foram as alternativas que mais contribuíram para reduzir a cobertura de E. plana. As gramíneas nativas presentes na vegetação do acostamento, Paspalum plicatulum Mitchx, Piptochaetium montevidense (Spreng.) Parodi e a espécie nativa introduzida (Paspalum urvillei) têm potencial para controlar a invasão de E. plana.
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Lee, Jeongran, Chang-Seok Kim, In-Yong Lee, and Young-Woo Han. "First records of Paspalum notatum Flüggé and P. urvillei Steud. (Poaceae) in Korea." Journal of Species Research 2, no. 1 (February 28, 2013): 79–84. http://dx.doi.org/10.12651/jsr.2013.2.1.079.

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16

Demina, O. N. "East Black Sea forb-bunchgrass steppes of the Don River basin (within Rostov region)." Vegetation of Russia, no. 20 (2012): 27–47. http://dx.doi.org/10.31111/vegrus/2012.20.27.

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The studied steppe communities to the east of the Black Sea were attributed to the alliance Festucion valesiacae and two suballiances: Festuco rupicolae—Stipenion pennatae and Phlomenion pungentis. A comparison of the floristic composition of the described associations: Trifolio alpestris—Stipetum tirsae, Artemisio marschallianae—Stipetum dasyphyllae and Bellevalio sarmaticae—Stipetum pennatae, belonging to the suballiance Festuco rupicolae—Stipenion pennatae, and communities of the east European meadow steppe, shows their significant difference. The described associations are neighboring ones to these of the suballiance Phlomenion pungentis which represents the true steppes of the Azov Sea area, Donetsk oblast (Saitov, Mirkin, 1991 : 92). Plant community associations such as Plantagini urvillei—Stipetum tirsae and Stipetum lessingianae were attributed to the suballiance Phlomenion pungentis.
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17

Oliveira de Araujo, Talita, Marie-Pierre Isaure, Ghaya Alchoubassi, Katarzyna Bierla, Joanna Szpunar, Nicolas Trcera, Sandrine Chay, et al. "Paspalum urvillei and Setaria parviflora, two grasses naturally adapted to extreme iron-rich environments." Plant Physiology and Biochemistry 151 (June 2020): 144–56. http://dx.doi.org/10.1016/j.plaphy.2020.03.014.

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18

Burson, Byron L. "Cytology and reproductive behavior of hybrids between Paspalum urvillei and two hexaploid P. dilatatum biotypes." Genome 35, no. 6 (December 1, 1992): 1002–6. http://dx.doi.org/10.1139/g92-153.

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Sexual, tetraploid (2n = 4x = 40) vaseygrass (Paspalum urvillei Steud.) was crossed with two apomictic, hexaploid (2n = 6x = 60) dallisgrass (P. dilatatum Poir.) biotypes (Uruguayan and Uruguaiana) to determine their relationships and the reproductive behavior of the hybrids. One vaseygrass × Uruguayan and two vaseygrass × Uruguaiana hybrids were studied and all had 2n = 5x = 50 chromosomes. The mean pairing meiotic association for the vaseygrass × Uruguayan hybrid was 10.18 I and 19.91 II, and for the two vaseygrass × Uruguaiana hybrids was 10.28 I, 19.82 II, 0.006 III, and 0.01 IV. These findings indicate that the parents of both hybrids have two homologous genomes. Because vaseygrass and Uruguayan dallisgrass have the genome formulas IIJJ and IIJJXX, respectively, their hybrid has the formula IIJJX and the two homologous genomes are the I and J genomes. Likewise, chromosome pairing in the vaseygrass × Uruguaiana hybrids demonstrates that both species have two similar genomes, I and J. The Uruguaiana biotype usually has 8–10 univalents per cell and these result from the failure of some members of the third genome to pair. Thus the Uruguaiana biotype has different forms of the X genome, and its genome formula may be designated as IIJJXX2. Cytologically all three hybrids were facultative apomicts but their uniform F2 progeny indicates that only the apomictic embryo sacs are functional. Seed fertility ranged from 10.8 to 16.2%.Key words: Interspecific hybrids, genomes, chromosome pairing, species relationships, dallisgrass, vaseygrass.
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Ferreira, Juliano Lino, Raoni Gwinner, Leila Maria Ferreira, Jéferson Ferronato, Leandro Gonçalves Leite, Kátia Graciele Gonçalves Ferreira, Júlio César Rodrigues Lopes Silva, Luís Paulo dos Santos, and Alisson Wilians Teixeira Silva. "Understanding the extent of phenotypic variability in accessions of Paspalum urvillei Steud. from the USDA NPGS." Iheringia, Série Botânica 75 (April 7, 2020): e2020006-e2020006. http://dx.doi.org/10.21826/2446-82312020v75e2020006.

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Caponio, I., and C. L. Quarin. "Cytology and Reproduction of Paspalum densum and Its Genomic Relationship with P. intermedium and P. urvillei." Journal of Heredity 84, no. 3 (May 1993): 220–22. http://dx.doi.org/10.1093/oxfordjournals.jhered.a111323.

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21

Tubbs, P. K., and P. J. Hogarth. "Occurrence of Uca (Deltuca) Urvillei (H. Milne Edwards, 1852) in the Saudi Red Sea (Decapoda, Ocypodidae)." Crustaceana 51, no. 2 (1986): 222–24. http://dx.doi.org/10.1163/156854086x00737.

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Ma, Kevin C. K., and Christopher D. McQuaid. "Review of range extensions of tropical brachyuran crabs into temperate waters of southern Africa." Crustaceana 94, no. 10 (October 27, 2021): 1235–62. http://dx.doi.org/10.1163/15685403-bja10144.

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Abstract We compiled known occurrence records of seven species of crabs identified in the literature and one documented in this report as having undergone range extensions in southern Africa. Of these eight species, six (Austruca occidentalis, Neosarmatium africanum, Ocypode ceratophthalmus, Portunus segnis, Tubuca urvillei, and Varuna litterata) have extended their ranges either across a major biogeographic boundary that separates the subtropical and warm temperate ecoregions of this coast, or into estuaries that historically lack mangrove forests. For the seventh and eighth species, Charybdis smithii and Scylla serrata, we were unable to find any distributional data that supported poleward range extension. In addition, we contribute the first record of the blue swimming crab, P. segnis, from the temperate south coast of South Africa. This early detection is likely to be part of an ongoing regional trend of tropical-adapted brachyuran crab species extending their ranges into temperate ecoregions.
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Dyson, Miranda L., and Patricia R. Y. Backwell. "Alternative mating tactics and male mating success in two species of fiddler crab." Behaviour 153, no. 12 (2016): 1403–18. http://dx.doi.org/10.1163/1568539x-00003386.

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The use of alternative male mating tactics can determine the strength of sexual selection on male traits and have implications for sexual dimorphism. We examined size-based mating success in two species of fiddler crabs where males use each of two alternative tactics to obtain matings. InUca annulipes, larger males were more successful when using the primary mating tactic (burrow mating) but the full size range of males mated when using the secondary tactic (surface mating). InUca urvillei, both burrow and surface mating males were larger than the average sized male in the population. Standardised directional selection gradients indicated that selection on male size was stronger inU. urvilleithanU. annulipes, reflecting the differences between species in male mating success. Our results also showed that sexual size dimorphism was greater in the species with stronger sexual selection on male size than in the species with weaker sexual selection.
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24

Bona, Mehmet. "Achene characteristics of Turkish Centaurea (Asteraceae) and their systematic application." Bangladesh Journal of Botany 43, no. 2 (January 19, 2015): 163–68. http://dx.doi.org/10.3329/bjb.v43i2.21668.

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This article investigates the exomorphic characteristics of the achenes which are achene size, color, and surface pattern, and pappus length, and colour. All these characteristics in seven taxa of Asteraceae namely, C. aggregata Fisch. & C.A. Mey. ex DC. subsp. aggregata, C. sivasica Wagenitz, C. polypodiifolia Boiss. var. polypodiifolia, C. polypodiifolia Boiss. var. szowitziana (Boiss.) Wagenitz, C. iberica Trev. ex Spreng, C. urvillei DC. subsp. stepposa Wagenitz, and C. carduiformis DC. subsp. carduiformis var. carduiformis in are described, illustrated and compared. The results of SEM at higher magnification showed three types of achene surface patterns: glebulate-ruminate, smooth, and rugose. In these patterns, there were diagnostic characteristics and differences at the specific level for Centaurea. A key to the taxa has been provided on the basis of these achene characteristics. DOI: http://dx.doi.org/10.3329/bjb.v43i2.21668 Bangladesh J. Bot. 43(2): 163-168, 2014 (September)
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Quarín, Camilo L., and Irene Caponio. "Cytogenetics and Reproduction of Paspalum dasypleurum and Its Hybrids with P. urvillei and P. dilatatum Ssp. Flavescens." International Journal of Plant Sciences 156, no. 2 (March 1995): 232–35. http://dx.doi.org/10.1086/297245.

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Litulo, Carlos. "Population structure and reproductive biology of the fiddler crabUca urvillei(Brachyura: Ocypodidae) in Maputo Bay (south Mozambique)." Journal of Natural History 39, no. 25 (September 2005): 2307–18. http://dx.doi.org/10.1080/00222930502005688.

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Litulo, Carlos. "Population structure and reproductive biology of the fiddler crab Uca urvillei (Brachyura: Ocypodidae) in Maputo Bay (south Mozambique)." Journal of Natural History 39, no. 25 (2005): 2307–18. http://dx.doi.org/10.1080/00222930500101688.

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محمد عبد العزيز باعضكة, محمد عبد العزيز باعضكة. "تنوع السرطانات الحقيقية في نبات المانجروف على امتداد الساحل الجنوبي للمملكة العربية السعودية، البحر الأحمر." journal of king abdulaziz university marine science 28, no. 1 (January 3, 2018): 43–54. http://dx.doi.org/10.4197/mar.28-1.4.

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تعد الدراسات السابقة على التنوع الحيوي للسرطانات الحقيقية المرتبطة بأشجار المانجروف على ساحل البحر الأحمر في المملكة العربية السعودية قليلة نسبيا. خلال هذه الدراسة، تمت دراسة التنوع الحيوي لسرطانات الحقيقة في منطقة الدرب (المحطة الأولى) ومنطقة جازان (المحطة الثانية)، والتي تشمل منطقة ذات الغطاء النباتي كثيف، ومنطقة شبه مغلقة (لاجون) التي تحيط بها أشجار المانجروف. وتم التعرف على عشرة أنواع من السرطانات الحقيقية تنتمي إلى خمس عوائل خلال المسح، وهي: ميتوبوجرابسيس ثوكوهار (Metopograpsus thukuhar) (عائلة الجرابسيدي)، وأشتوريت (Ashtoret sp.) (عائلة الماتوتيدي)، وماكروفثالميس ديبريسيس (Macrophthalmus depressus)، وماكروفثالميس جرانديديري (Macrophthalmus grandidieri) (عائلة الماكروفثالميدي)، وأوستراكا البيمينا (Austruca albimana)، وكرانيوكا إينفيرسا (Cranuca inversa)، وتيوبوكا يورفيللي (Tubuca urvillei) (عائلة أويسيبوديداي)، وإيريكارسينيس (Eurycarcinus sp..) (عائلة بيلومينيداي)، وبوريتينيس سيجنيس (Portunus segnis)، وثالاميتا (Thalamita sp.) (عائلة السرطانات السابحة بورتينيداي). وأظهرت نتائج تحليل التباين ANOVA بمتغير واحد أنه لا يوجد اختلاف بين المواقع من حيث الوفرة لهذه الأنواع. كما أشارت نتائج الدراسة إلى أن المساحات الواقعة مباشرة تحت أشجار المانغروف غنية بالأنواع، ولها قيم أعلى من معامل مارجاليف لثراء الأنواع (Margalef species richness)، ومكافئ بيلو (Pielou's evenness)، ومؤشر شانون- وينر للتنوع (diversity index Shannon-Wiener).
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Karpov, Daniel Nikolaevich, Stanislav Danielevich Karpov, and Liliya Zaynullovna Atnasheva. "Plantains role in the composition of the Southern Urals grassy cover." Samara Journal of Science 6, no. 1 (March 1, 2017): 33–36. http://dx.doi.org/10.17816/snv201761106.

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The paper discusses the role and importance of various plantain species, found in the southern Urals in the Republic of Bashkortostan and the Orenburg Region. The paper contains description of the 7 species of plantain, their ecology, distribution, national economic significance, participation in various syntaxa extracted using eco-floristic approach of Brown-Blanke. Many of the species are plantains of taxonomic rank classes, orders, unions, associations: class SJ - Scorzonero-Juncetea gerardii, order SJg - Scorzonero-Juncetalia gerardii, union CH - Cirsio-Hordeion, TS class - Thero-Salicornietea, class FP-Festuco-Puccinellietea, order Fv - Festucetalia valesiacae, FB class - Festuco-Brometea, class M-A - Molinio-Arrhenantheretea. By origin they belong to different geographic elements: old Mediterranean meadow - Plantago cornuti Gouan; Pontian - Plantago maxima Juss. ex Jacq.; Euro-West Asian forest - Plantago media L.; Euro-West Asian forest-steppe - Plantago urvillei Opiz; Holarctic plyurizonalniy - Plantago major L. There is a species among the plantains that is found in the Red Book of the Republic of Bashkortostan - Plantago krascheninnikovii C.Serg. found in N.Yulbarisovo village of Khaybullinsky District (the Republic of Bashkortostan) near the Erangas river.
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30

Uysal, Sengul, Ramazan Ceylan, Gokhan Zengin, Abdurrahman Aktumsek, Nilgun Zengin, Gokalp Ozmen Guler, Yavuz Selim Cakmak, Evren Yildiztugay, and Sukru Karatas. "PHYTOCHEMICAL CHARACTERIZATION OF AN ENDEMIC PLANT USED AS FOODSTUFF IN TURKEY: CENTAUREA URVILLEI SUBSP. STEPPOSA AND ITS ANTIOXIDANT PROPERTIES." International Research Journal of Pharmacy 5, no. 8 (September 20, 2014): 646–52. http://dx.doi.org/10.7897/2230-8407.0508132.

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31

Emmerson, W. D. "The effect of temperature and season on the aerial oxygen consumption of Uca urvillei (H. Milne Edwards) (Decapoda: Ocypodidae)." Journal of Thermal Biology 15, no. 1 (January 1990): 41–46. http://dx.doi.org/10.1016/0306-4565(90)90046-k.

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32

Rosito, Jumaida Maria, Enio Marchezan, and Fernando Luiz Ferreira de Quadros. "Seleção de dieta por bovinos em pastagem cultivada em área de várzea." Ciência Rural 34, no. 4 (August 2004): 1191–96. http://dx.doi.org/10.1590/s0103-84782004000400034.

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O trabalho foi realizado em uma área de 3,0ha de várzea, situada no Campus da Universidade Federal de Santa Maria, Rio Grande do Sul (Brasil), cultivada com Lolium multiflorum Lam. e Trifolium repens L, onde se destacavam, também, alguns componentes nativos. O objetivo deste trabalho foi acompanhar, de forma paralela às ações de manejo, a dinâmica da composição botânica da dieta selecionada por bovinos em pastejo, sob o efeito de tratamentos (diferentes doses de P e K) e da sazonalidade. O delineamento experimental foi o completamente casualizado com duas repetições. O método de pastejo adotado foi o contínuo, com lotação fixa e carga variável. No inverno, primavera e verão de 1999/2000, foi determinada a composição botânica da dieta pelo método de análise microhistológica de fezes, através da diferenciação da epiderme foliar de L. multiflorum Lam., T. repens L., e dos componentes nativos Paspalum urvillei Steud., Setaria geniculata (Lam.) Beauv. e Echinochloa spp. Os resultados foram comparados através de testes de aleatorização. A composição botânica da dieta não foi afetada pelos tratamentos impostos à pastagem (P=0,87), mas houve efeito das épocas de amostragem sobre a seleção (P=0,03). As espécies da flora nativa, embora prejudicadas pelo manejo imposto, foram selecionadas pelos animais em pastejo, configurando-se num importante recurso forrageiro.
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33

Stepantsova, Nadezda V., Viktor V. Chepinoga, Sergey G. Kazanovskiy, Vasily S. Vishnyakov, Oksana A. Kostromina, and V. A. Belova. "Floristic findings on the territory of Baikal Siberia." Turczaninowia 25, no. 3 (September 30, 2022): 194–206. http://dx.doi.org/10.14258/turczaninowia.25.3.18.

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15 new native and alien species of vascular plants are reported for the Irkutsk Region, Republic of Buryatia, and Trans-Baikal Territory: Agropyron michnoi Roshev., Arctopoa schischkinii (Tzvelev) Prob., Arnica intermedia Turcz., Atocion armeria (L.) Fourr., Cynodon dactylon (L.) Pers., Dracocephalum argunense Fisch. ex Link, Eragrostis minorHost, Festuca richardsonii Hook., Lespedeza davurica (Laxm.) Schindl., Leymus paboanus (Claus) Pilg., Lophanthus chinensis (Rafin.) Benth., Lycopsis orientalis L., Najas marina L., Ostericum palustre (Besser) Besser, Phlox drummondii Hook. Besides, new localities of 19 species rare and endangered in Baikal Siberia are presented, i. e. Achillea nobilis L., Campanula sibirica L., Carduus nutans L., Carex gotoi Ohwi, Cotoneaster uniflorus Bunge, Dracocephalum thymiflorum L., Elodea canadensis Michx., Elymus ircutensis Peschkova, Festuca extremiorientalisOhwi, Fimbripetalum radians (L.) Ikonn., Gypsophila paniculata L., Listera ovata (L.) R. Br., Paeonia anomala L.,Plantago urvillei Opiz, Puccinellia distans (Jacq.) Parl., Sedum acre L., Stipa grandis P. A. Smirn., Tillaea aquatica L., Tussilago farfara L. Among the listed species, five (Arctopoa schischkinii, Festuca extremiorientalis, Listera ovata, Paeonia anomala, Tillaea aquatica) are included in the Red Data Books of Russian Federation, of the Irkutsk Region and the Republic of Buryatia. For each species, list of new localities, as well as general, ecological, and geographical remarks are presented.
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Speranza, Pablo, and Marcos Malosetti. "Nuclear and cytoplasmic microsatellite markers for the species of the Dilatata group of Paspalum (Poaceae)." Plant Genetic Resources: Characterization and Utilization 5, no. 01 (March 21, 2007): 14–26. http://dx.doi.org/10.1017/s1479262107192145.

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The Dilatata group ofPaspalumis a polyploid complex native to the grasslands of temperate South America. A pentaploid apomictic biotype ofP. dilatatumis a widely recognized forage grass; however, the complex includes apomictic tetra- and hexaploids along with sexual allotetraploids (P. urvillei,P. dasypleurum,P. dilatatumssp.flavescens, and biotypes Virasoro and Vacaria ofP. dilatatum) which are suspected to be hybrids between different combinations of biotypes. Fifteen primer pairs for nuclear microsatellite loci were developed from a (CA)n-enriched genomic library. A single, low stutter, robust two-step PCR profile was used for all the primer pairs. Twelve primer pairs were analysed for their variability and transferability among all the sexual biotypes of the Dilatata group and the common apomictic pentaploid. Six primer pairs amplified more than one locus, and sequence and segregation evidence suggest that the additional bands correspond to homeologous loci. No close linkage was found among the 16 loci amplified in the tetraploids. One variable chloroplast microsatellite is also reported. All loci were successfully amplified from most members of the Dilatata group and variability was recorded for all the biotypes analysed. The set of loci reported here provide highly variable markers for intra-biotypic population studies, biotype-specific markers for the analysis of hybrid apomicts and a biotype-specific chloroplast marker.
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Witherell, AF, AJK Millar, and GT Kraft. "Taxonomic studies of the genus Gracilaria (Gracilariales, Rhodophyta) from Australia." Australian Systematic Botany 7, no. 4 (1994): 281. http://dx.doi.org/10.1071/sb9940281.

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The taxonomic history of the genus Gracilaria in Australia is reviewed, and nine species are described and illustrated in detail. Two (G. comosa and G. stipitata) are newly described, and the new name G. cliftonii is proposed for the species previously known as G. furcellata Harvey [non G. furcellata (Montagne) Zanardini = Sarconema filiforme (Sonder) Kylin]. New records and observations are given for four species [G. harveyana J.Agardh, G. preissiana (Sonder) Womersley, G. salicornia (C.Agardh) Dawson, and G. urvillei (Montagne) Abbott in Abbott, Zhang & Xia], and two species [G. blodgettii Harvey and G. cf. vieillardii Silva in Silva, Menez & Moe] are added to the Australian flora. An additional seven or eight species that are incompletely known also occur on the continent and are briefly discussed but not illustrated. For nomenclatural and anatomical reasons we propose that G. spinulosa (Okamura) Chang & Xia forma srilankia Chang & Xia, based on G. purpurascens Harvey ex J. Agardh [non G. purpurascens (Hudson) Greville = Cystoclonium purpurascens (Hudson) Kutzing] and not yet recorded from Australia, be elevated to species status as G. srilankia (Chang & Xia) comb. nov. We propose that Gracilaria harveyana J. Agardh 1885 be conserved against Polyides flagelliformis Sonder 1845, which Professor H.B.S. Womersley has determined is an obscure but earlier name for this well-known Western Australian species.
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Pisano, Eva, C. Ozouf-Costaz, J.-C. Hureau, and R. Williams. "Chromosome differentiation in the subantarctic Bovichtidae species Cottoperca gobio (Günther, 1861) and Pseudaphritis urvillii (Valenciennes, 1832) (Pisces, Perciformes)." Antarctic Science 7, no. 4 (December 1995): 381–86. http://dx.doi.org/10.1017/s0954102095000526.

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A cytogenetic study on the bovichtid species Cottoperca gobio from the Magellan Strait and Pseudaphritis urvillii from Tasmania showed both species have a plesiomorphic number of chromosomes (2n=48). However, C.gobio has a more conservative karyotype composed entirely of acrocentric chromosomes (Fundamental Number=48); the presence of two metacentric pairs in P. urvilli (FN=52) makes this species karyologically more derived. The differences in the number of chromosomal arms, and the chromosomal location of the nucleolar organizer regions indicate karyological divergence in the two separating stocks from which C.gobio and P.urvillii originated. During the diversification of this notothenioid family, probably coincident with the fragmentation of Gondwana, the stock that split off with the Australian Plate gave rise to the Tasmanian species and experienced more chromosomal modifications than the stock from which C. gobio is derived. The pattern of constitutive heterochromatin suggests a possible homology between a pair of chromosomes in bovichtids and other notothenioids.
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Oliveira de Araujo, Talita, Marie-Pierre Isaure, Ghaya Alchoubassi, Katarzyna Bierla, Joanna Szpunar, Nicolas Trcera, Sandrine Chay, et al. "Corrigendum to “Paspalum urvillei and Setaria parviflora, two grasses naturally adapted to extreme iron-rich environments” [Plant Physiol. Biochem. 151 (2020) 144–156]." Plant Physiology and Biochemistry 185 (August 2022): 356. http://dx.doi.org/10.1016/j.plaphy.2022.06.020.

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Machado, Ana Caroline de Carvalho, José Francisco Montenegro Valls, Andréa del Pilar de Souza Peñaloza, and Sileuza dos Santos. "Novos biótipos pentaplóides do grupo Dilatata de Paspalum L. (Gramineae) no Sul do Brasil." Ciência Rural 35, no. 1 (February 2005): 56–61. http://dx.doi.org/10.1590/s0103-84782005000100009.

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Paspalum dilatatum é uma gramínea nativa da América do Sul subtropical, com bom valor forrageiro e ampla variabilidade intraespecífica. Distintos tipos morfológicos, citológicos e reprodutivos têm sido citados para esta espécie. Paspalum dilatatum "Comum" é o biótipo de maior interesse agronômico. A constatação da importância da espécie como componente da produção de forragem de boa qualidade em campos naturais vem resultando em contínuo interesse pela possibilidade de seu melhor aproveitamento em cultivo. Entre o material do grupo Dilatata submetido à análise, seis acessos de classificação taxonômica não definida apresentaram morfologia distinta dos demais. Acredita-se que sejam resultantes de processos de hibridação natural em combinações antes desconhecidas. A análise mitótica evidenciou que todos possuem 2n=50 cromossomos. Três destes acessos mostraram características morfológicas intermediárias entre os biótipos "Virasoro" (4x, sexual) e "Uruguaiana" (6x, apomítico). A confirmação de ocorrência geográfica próxima reforça a hipótese de hibridação e evidencia uma ampliação da área de ocorrência do biótipo sexual envolvido neste cruzamento. Os outros acessos são, provavelmente, híbridos naturais entre P. dilatatum "Torres" e P. urvillei. Tais acessos mostram a inflorescência com eixo mais longo e com mais ramos que as plantas típicas do biótipo "Torres". A caracterização morfológica e citológica do material discrepante poderá levar ao estabelecimento de parâmetros seguros para sua diferenciação, que permitam sua inclusão em categorias taxonômicas adequadas. Sugere-se a origem destes novos biótipos pentaplóides distintos do "Comum", a partir de cruzamentos ocorridos no Sul do Brasil entre outros dois biótipos e espécies do grupo.
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39

Tuffi Santos, L. D., I. C. Santos, C. H. Oliveira, M. V. Santos, F. A. Ferreira, and D. S. Queiroz. "Levantamento fitossociológico em pastagens degradadas sob condições de várzea." Planta Daninha 22, no. 3 (September 2004): 343–49. http://dx.doi.org/10.1590/s0100-83582004000300003.

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O levantamento foi realizado em duas áreas de várzea, eventualmente inundáveis, localizadas na Fazenda Experimental de Leopoldina, da Empresa de Pesquisa Agropecuária de Minas Gerais. A área 1, de 3 ha, estava ocupada por uma pastagem de capim-angola (Brachiaria mutica), mal manejada e sem controle de plantas daninhas há mais de dez anos. A área 2, de 5 ha, estava ocupada por uma pastagem de capim-setária (Setaria anceps cv. Kazungula), implantada na estação chuvosa do ano anterior, cuja formação ficou prejudicada pelo baixo estabelecimento da forrageira. Para o estudo fitossociológico, utilizou-se o método do quadrado inventário, aplicado por meio de um quadrado de 1,0 m², lançado ao acaso 19 vezes na área 1 e 41 vezes na área 2. As espécies encontradas foram identificadas e cadastradas. Na pastagem de capim-angola foram identificadas 27 espécies, distribuídas em 11 famílias e na pastagem de capim-setária 34 espécies distribuídas em 13 famílias. As famílias mais representativas em número de espécies foram: Poaceae (11), Asteraceae (6), Papilionoideae (5), Malvaceae e Euphorbiaceae (4). As maiores freqüências foram das seguintes espécies: Cynodon dactylon, Sida rhombifolia, Cyperus esculentus, Mimosa pudica, Senna occidentalis, Setaria anceps cv. Kazungula e Paspalum urvillei. Em geral, as duas áreas apresentaram-se infestadas com plantas daninhas, inclusive com plantas tóxicas, espinescentes e de baixa palatabilidade, reduzindo a capacidade de suporte animal dos pastos e impedindo o aproveitamento adequado das áreas pelos bovinos.
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40

Marques, Anderson Cesar Ramos, Leandro Bittencourt de Oliveira, Raíssa Schwalbert, Bianca Knebel Del Frari, Gustavo Brunetto, Fernando Luiz Ferreira de Quadros, Carlos Nabinger, and Fernando Teixeira Nicoloso. "Growth strategies as determinants of CO2 sequestration and response to nitrogen fertilisation in C4 grasses in South American natural grasslands." Crop and Pasture Science 71, no. 8 (2020): 776. http://dx.doi.org/10.1071/cp19301.

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Grass species grown in South American natural grasslands present different growth strategies related to variations in specific leaf area (SLA), leaf dry matter content (LDMC) and possible nitrogen (N) allocation. Nitrogen fertilisation can have effects on physiological processes such as CO2 assimilation; however, these responses can change depending on the growth strategy adopted by each species. The aim of the present study is to determine the effects of N fertilisation on SLA, LDMC and CO2 assimilation in eight C4 grass species: Axonopus affinis, Paspalum pumilum, P. notatum, P. urvillei, P. plicatulum, Andropogon lateralis, Saccharum angustifolium and Aristida laevis. These species were cultivated in pots filled with soil subjected to two conditions of N availability: nil (control) and 200 mg N kg–1 soil. The SLA of Axonopus affinis was 5.4 times higher than that of Aristida laevis. Axonopus affinis and P. pumilum recorded the lowest LDMC, their leaves showed 53% lower LDMC than observed for Aristida laevis, on average. Resource-capture species showed variation in leaf area with N addition to values 20% higher than the control, whereas species characterised by a resource-conservation growth strategy recorded variation in leaf area with N addition to values only 8% higher than the control. With N addition, the CO2 assimilation of resource-capture species represented variation (increase) nine times that of resource-conservation species compared with their respective controls. Resource-capture species have greater CO2 capture potential than resource-conservation species, mainly a result of N addition.
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41

ISHIMINE, Yukio, Misao NAKAMA, and Sigeo MATSUMOTO. "Allelopathic potential of Paspalum urvillei Steud., Bidens pillosa L. var. radiata Scherff., and Stellaria aquatica Scop., dominant weeds in sugarcane fields in the Ryukyu Islands." Journal of Weed Science and Technology 32, no. 4 (1987): 274–81. http://dx.doi.org/10.3719/weed.32.274.

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42

ISHIMINE, Yukio, Kiyomatsu MIYAZATO, and Shigeo MATSUMOTO. "Physiological and ecological characteristics of weeds of sugarcane fields in the Ryukyu islands. 3. Effects of shading on growth and seed production of Paspalum urvillei Steud." Journal of Weed Science and Technology 30, no. 2 (1985): 148–50. http://dx.doi.org/10.3719/weed.30.148.

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43

Vaio, Magdalena, Cristina Mazzella, Marcelo Guerra, and Pablo Speranza. "Effects of the diploidisation process upon the 5S and 35S rDNA sequences in the allopolyploid species of the Dilatata group of Paspalum (Poaceae, Paniceae)." Australian Journal of Botany 67, no. 7 (2019): 521. http://dx.doi.org/10.1071/bt18236.

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The Dilatata group of Paspalum includes species and biotypes native to temperate South America. Among them, five sexual allotetraploids (x = 10) share the same IIJJ genome formula: P. urvillei Steud, P. dasypleurum Kunze ex Desv., P. dilatatum subsp. flavescens Roseng., B.R. Arrill. &amp; Izag., and two biotypes P. dilatatum Vacaria and P. dilatatum Virasoro. Previous studies suggested P. intermedium Munro ex Morong &amp; Britton and P. juergensii Hack. or related species as their putative progenitors and donors of the I and J genome, respectively, and pointed to a narrow genetic base for their maternal origin. It has not yet been established whether the various members of the Dilatata group are the result of a single or of multiple allopolyploid formations. Here, we aimed to study the evolutionary dynamics of rRNA genes after allopolyploidisation in the Dilatata group of Paspalum and shed some light into the genome restructuring of the tetraploid taxa with the same genome formula. We used double target fluorescence in situ hybridisation of 35S and 5S rDNA probes and sequenced the nrDNA internal transcribed spacer (ITS) region. A variable number of loci at the chromosome ends were observed for the 35S rDNA, from 2 to 6, suggesting gain and loss of sites. For the 5S rDNA, only one centromeric pair of signals was observed, indicating a remarkable loss after polyploidisation. All ITS sequences generated were near identical to the one found for P. intermedium. Although sequences showed a directional homogeneisation towards the putative paternal progenitor in all tetraploid species, the observed differences in the number and loss of rDNA sites suggest independent ongoing diploidisation processes in all taxa and genome restructuring following polyploidy.
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44

Korolyuk, A. Yu. "Plant communities of the Class Festuco-Brometea in the West Siberian Plane." Vegetation of Russia, no. 25 (2014): 45–70. http://dx.doi.org/10.31111/vegrus/2014.25.45.

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The West-Siberian Plain extends more than 1200 km from west to east. Its southern part is occupied by steppe and forest-steppe zones with pre-dominance of herbaceous plant communities. Steppes and xeric meadows are widespread on this territory and characterized by a high diversity and complex spatial structure. This study presents the analysis of 874 relevés describing xeric meadows and steppes of the class Festuco-Brometea from the West Siberian Plain. Numerical analysis with using of plant indicator values showed that some ecological factors, such as soil moisture, salinity and sand content are important in differentiation of grasslands. Three zonal associations form the sequence on the latitudinal gradient from 56º to 51º of northern latitude: Galatello biflorae–Calamagrostietum epigeii (xeric meadows and meadow steppes on solonetz soils in forest-steppe zone), Helictotricho desertori–Stipetum rubentis (rich bunchgrass steppes of southern part of forest-steppe zone and northern part of steppe zone), Artemisio austriacae–Stipetum capillatae (typical bunchgrass steppes of steppe zone). Zonal associations form complexes with other grasslands of Festuco-Brometeae. In forest-steppe landscapes zonal communities usually adjoined with Galio borealis–Artemisietum ponticae in more mesic habitats and with halophyte association Limonio gmelini–Phleetum phleoides. In steppe regions zonal associations make an assemblage with relatively mesic grasslands of Trommsdorffio maculatae–Stipetum pennatae and halophyte communities of Limonio gmelini–Stipetum capillatae on solonetz soils. Three associations form the sequence related with increasing of sand content in soils: Gypsophilo paniculatae–Artemisietum glaucae, Sileno borysthenicae–Cleistogenetum squarrosae, Scorzonero ensifoliae–Festucetum valesiacae. All grasslands usually are under intense grazing that cause changes in plant communities, first of all, the reduction of meso-xerophyte species diversity. The class Festuco-Brometea in the West Siberian plain is divided into two orders. The order Festucetalia valesiacae unites xeric meadows and meadow steppes in forest-steppe landscapes. The class and order are diagnosed mainly by meso-xerophyte species with wide Eurosiberian distribution: Anemone sylvestris, Artemisia glauca, A. latifolia, Astragalus danicus, Campanula sibirica, Centaurea scabiosa, Dianthus versicolor, Festuca pseudovina, Festuca valesiaca, Filipendula vulgaris, Fragaria viridis, Galium ruthenicum, Galium verum, Koeleria cristata, Medicago falcata, Phleum phleoides, Phlomoides tuberosa, Plantago urvillei, Poa angustifolia, Polygala comosa, Scabiosa ochroleuca, Seseli libanotis, Stipa capillata, Stipa pennata, Tephroseris integrifolia, Trommsdorffia maculata, Veronica spicata. This order is presented by the alliance Galatellion biflorae located to the west from the Ob River (Korolyuk, Kiprijanova, 1998). Its communities differ from others by presence of salt-tolerant species: Artemisia pontica, Artemisia rupestris, Carex caryophyllea, Galatella biflora, Inula britannica, Melampyrum cristatum, Peucedanum morisonii, Plantago maxima, Silene multiflora. To the east from the Ob River this alliance is replaced by Poo urssulensis–Artemision glaucae, in the South Urals by Festucion valesiacae. The xeric meadows of Festuco-Brometea north from forest-steppe zone are replaced by mesic meadows of Molinio-Arrhenatheretea. The order Helictotricho-Stipetalia represents the typical steppes and xeric variants of meadow steppes. Its distribution covers steppe zone and southern part of forest-steppe zone. The main part of its diagnostic combination is formed by xerophyte steppe plants: Achillea nobilis, Adonis villosa, Androsace maxima, Artemisia austriaca, Carex supina, Galatella angustissima, Helictotrichon desertorum, Jurinea multiflora, Onosma simplicissima, Oxytropis pilosa, Pilosella echioides, Potentilla bifurca, P. humifusa, Salvia stepposa, Scorzonera austriaca, Seseli ledebourii, Spiraea crenata, Stipa zalesskii, Taraxacum erythrospermum, Thymus marschallianus, Verbascum phoeniceum, Veronica incana. Three alliances form the sequence along moisture gradient: more mesic rich steppes of Helictotricho desertori–Stipion rubentis (diagnostic species: Helictotrichon desertorum, Stipa zalesskii, Thymus marschallianus, Artemisia latifolia, Filipendula vulgaris, Fragaria viridis, Phlomoides tuberosa, Plantago urvillei, Seseli libanotis, Artemisia pontica, A. rupestris, Galatella biflora, Peucedanum morisonii, Silene multiflora), typical steppes of Artemisio austriacae–Festucion valesiacae (diagnostic species: Androsace maxima, Artemisia austriaca, Carex supina, Po­ten­tilla bifurca, Scorzonera austriaca, Taraxacum erythrospermum), and dry steppes of Stipion korshinskyi Toman1969 (diagnostic species: Kochia prostrata, Krascheninnikovia ceratoides, Leymus ramosus, Phlomoides agraria, Stipa korshinskyi, Stipa lessingiana).
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45

ISHIMINE, Yokio, Kiyomatsu MIYAZATO, and Shigeo MATSUMOTO. "Physiological and ecological characteristics of weeds of sugarcane fields in the Ryukyu islands. 2. Effect of nitrogen level on growth and seed production of Paspalum urvillei Steud." Journal of Weed Science and Technology 30, no. 2 (1985): 143–47. http://dx.doi.org/10.3719/weed.30.143.

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46

Shih, Hsi-Te, Benny K. K. Chan, and Peter K. L. Ng. "Tubuca alcocki, a new pseudocryptic species of fiddler crab from the Indian Ocean, sister to the southeastern African T. urvillei (H. Milne Edwards, 1852) (Crustacea, Decapoda, Brachyura, Ocypodidae)." ZooKeys 747 (March 29, 2018): 41–62. http://dx.doi.org/10.3897/zookeys.747.23468.

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A new pseudocryptic species of fiddler crab,Tubucaalcockisp. n., is described from the northern Indian Ocean. The new species was previously identified withT.urvillei(H. Milne Edwards, 1852), but can be distinguished by the structures of the anterolateral angle of the carapace and male first gonopod. The molecular data of the mitochondrial cytochrome oxidase subunit I gene shows that both are sister taxa and the divergence time is estimated at 2.2 million years ago, around the beginning of the Pleistocene. While the new species is widely distributed in the northern part of Indian Ocean, occurring from the Red Sea to India and the Andaman Sea;T.urvilleisensu stricto has a more restricted range, and is known only from southeastern Africa.
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47

ISHIMINE, Yukio, Kiyomatsu MIYAZATO, and Shigeo MATSUMOTO. "Physiological and ecological characteristics of weeds of sugarcane fields in the Ryukyu islands. 4. Effects of soil moisture on the growth and seed production of Paspalum urvillei Steud." Journal of Weed Science and Technology 30, no. 2 (1985): 151–54. http://dx.doi.org/10.3719/weed.30.151.

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48

Vulliez, María A., María Bruni, Ana I. Trujillo, Martín Durante, Lucrecia Lezana, and Pablo Soca. "PSIV-10 Preference evaluation of plant functional types grasses in calves." Journal of Animal Science 97, Supplement_3 (December 2019): 225–26. http://dx.doi.org/10.1093/jas/skz258.459.

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Abstract The functional types of plants (PFT) ecological approach could be used to link the preferences of ruminants. In order to investigate if ruminant preferences were associated with this approach, three PFT groups were evaluated. A group “B”, represented by Paspalum urvillei (PU-B), “C” by Nassella neesiana (NN-C) and Sporobolus indicus (SI-C) and “D” by Andropogon lateralis (AL-D). In a randomized block design with repeated measures over time, two independent cafeteria trials (autumn-winter, A-W, and spring-summer, S-S) were carried out in calves (n = 8 for A-W; n = 4 for S-S; BW=240–270 kg) arranged in four pens. In three sessions of ten minutes each, calves received 120–160 gDM of fresh cut leaves from the different species. Dry matter intake (DMI), nitrogen intake (NI) and neutral detergent fiber intake (NDFI) were measured. Data were analyzed with a mixed model that included specie and session as fixed effects and blocks as a random. The statistical analyses were performed with SAS (University Edition), data is expressed as lsmeans and was considered to differ when Tukey test presented P &lt; 0.05. No significant differences were observed between sessions. The DMI and NI were higher in NN-C and lower in AL-D (P &lt; 0.01) during A-W. However, in S-S, higher DMI and NI were observed in AL-D and SI-C while NN-C presented the lower DMI and NI (P &lt; 0.01). The FDNI did not show differences in A-W meanwhile in S-S was positively associated with DMI (Table1). Interestingly, when the season changed, it was observed a change in PFT preference, in A-W calves preferred NN-C whereas in S-S preferred AL-D. However, attributes associated with preferences were maintained in both stations, for instance, higher DMI was associated with higher NI. Additional research is required on the interactions between PFT approach and the preference of animals for different species.
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49

Brown, Leslie R., Itumeleng P. Magagula, and Alan S. Barrett. "A vegetation classification and description of Telperion Nature Reserve, Mpumalanga, South Africa." Vegetation Classification and Survey 3 (November 3, 2022): 199–219. http://dx.doi.org/10.3897/vcs.85209.

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Aims: This study identified, classified and mapped the different plant communities found on the Telperion Nature Reserve. Study area: Telperion Nature Reserve, Mpumulanga, South Africa. Methods: Using a 1:10,000 aerial photograph, Telperion was delineated into homogenous physiognomic-physiographic units. 294 sample plots (100 m2) were placed in a randomly stratified manner within identified homogenous units. Plant species present in sample plots were recorded and allocated a modified Braun-Blanquet cover abundance scale value. Sample plot data were captured into TURBOVEG and exported for editing, classification and processing in JUICE. A modified TWINSPAN classification was applied to derive a first approximation of the plant communities in a synoptic table that was refined using Braun-Blanquet procedures. Species were manually arranged into groups. Diagnostic, constant and dominant species were statistically determined from the synoptic table. Threshold values for fidelity, frequency and canopy cover were set and a final phytosociological table was produced for describing the plant species composition for the different plant communities. Results: 22 plant communities were identified for Telperion. Five were major communities, 14 were sub-communities and 13 were variants. The five major plant communities were Cyathea dregei–Ilex mitis ravine woodland, Paspalum urvillei–Phragmites australis valley bottom wetland, Diospyros lycioides–Combretum erythrophyllum riparian woodland, Eragrostis curvula–Seriphium plumosum midslope plateau grassland, and Combretum molle–Englerophytum magalismontanum rocky ridge woodland. The plant communities were also described and mapped. Conclusions: The classification, description and mapping of Telperion’s vegetation provides a basis for management decision making about wildlife stocking rates, fire planning, and vegetation management. Findings indicate that Bankenveld vegetation is heterogeneous with a variety of habitats including woodland and grassland components. Telperion has a variety of plant communities and a high plant species diversity, making it a reservoir for plant species and an important conservation area. Taxonomic reference: SA-Plant Checklist-2019–2020, South African National Biodiversity Institute, 2020, Botanical Database of Southern Africa (BODATSA) (http://posa.sanbi.org/) [accessed January 2022]. Abbreviations: BB = Braun-Blanquet; m a.s.l. = metres above sea level; TWINSPAN = Two-way indicator species analysis.
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Ferrucci, María Silvia. "Revisión Taxonómica de Urvillea (Sapindaceae, Paullinieae): Un género americano." Boletín de la Sociedad Argentina de Botánica 55, no. 1 (March 25, 2020): 53–130. http://dx.doi.org/10.31055/1851.2372.v55.n1.24931.

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Introducción y objetivos: Urvillea Kunth es un pequeño género americano de arbustos o subarbustos trepadores, raro subarbustos erectos o hemicriptófitos rizomatosos. Se distribuye desde el sudoeste de los Estados Unidos (Texas) hasta el centro de Argentina, siendo Brasil el principal centro de diversidad. Urvillea se caracteriza por su duodicogamia, hojas trifoliadas y flores zigomorfas; usualmente cinco sépalos, cuatro lobos nectaríferos, anteras con una expansión apical del conectivo más o menos conspicua y frutos capsulares subcartáceos o cartáceos. Aunque algunos tratamientos regionales están disponibles, la única revisión exhaustiva del género fue publicada en 1932 por Radlkofer. En este trabajo se presenta una revisión taxonómica basada en colecciones modernas y estudios biosistemáticos. M&M: Se recopilaron datos taxonómicos de la literatura, incluidos estudios filogenéticos, y de observaciones de campo, y se analizaron especímenes de Urvillea de 90 herbarios. Se realizaron observaciones morfo-anatómicas con microscopía estereoscópica, óptica y electrónica de barrido. Resultados: Se reconocieron 20 especies de Urvillea. Se extendió la distribución geográfica para la mayoría de las mismas. Nueve nombres (ocho especies y una forma) fueron lectotipificados y se propusieron cuatro nuevos sinónimos. Además se describió la morfología polínica para todas las especies.
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