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Academic literature on the topic 'Roseum'

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Published: 10 March 2023

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Journal articles on the topic "Roseum"

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Zhou, X., H. Lin, X. L. Fan, and J. Y. Gao. "Autonomous self-pollination and insect visitation in a saprophytic orchid, Epipogium roseum (D.Don) Lindl." Australian Journal of Botany 60, no. 2 (2012): 154. http://dx.doi.org/10.1071/bt11265.

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Reproductive biology of saprophytic plants has been poorly studied. Epipogium roseum (D.Don) Lindl. is a small saprophytic orchid that is widely distributed in tropical and subtropical Asia, Australia and Africa. The floral biology and insect visitation of E. roseum were studied in Xishuangbanna, south Yunnan Province, China. E. roseum possesses an obligate self-pollination system, in which the degenerative rostellum has lost its function as a physical barrier separating the stigma and stamens (pollinia), allowing contact between the stigmatic secretions and the pollinia during bud development. Flowers of E. roseum usually open and successfully attract insect visitors. The Asian honey bee (Apis cerana cerana) was the only visitor observed, and regularly visited flowers of E. roseum for nectar. However, these bees did not carry pollinia away after visiting the flowers due to the absence of a viscid disk in E. roseum; the results of experiments also indicated that the Asian honey bee does not contribute to fruit set in E. roseum. The visiting frequency of Asian honey bees to flowers of E. roseum varied both spatially and temporally. E. roseum does not undergo outcrossing mediated by insects and is adapted to obligate self-pollination. We suggest that this may have evolved because of the uncertainty of pollinator services associated with its saprophytic lifestyle. Our current studies do not support the hypothesis that obligate autogamy is favoured by myco-heterotrophic plants due to resource limitations.
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DOWELD, ALEXANDER B. "Tetraphylloides, a new replacement name for Tetraphyllum C.B.Clarke (Gesneriaceae) non Tetraphyllum Hosius & von der Marck (fossil Magnoliophyta)." Phytotaxa 329, no. 3 (December 1, 2017): 293. http://dx.doi.org/10.11646/phytotaxa.329.3.13.

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Tetraphyllum C.B.Clarke (1883) (extant Gesneriaceae) is replaced by a new name Tetraphylloides Doweld nom. nov., because of the earlier homonym, Tetraphyllum Hosius & von der Marck (1880) (fossil angiosperm). Three new combinations are made: Tetraphylloides bengalensis comb. nov., Tetraphylloides confertiflora comb. nov. and Tetraphylloides roseus comb. nov. A new subtribal name Tetraphylloidinae subtrib. nov. is validated instead of illegitimate subtribe name Tetraphyllinae, nom. illeg. Didissandra confertiflora Drake and Tetraphyllum roseum Stapf are lectotypified.
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Huang, H. C., and E. G. Kokko. "Trichothecium roseum, a mycoparasite of Sclerotinia sclerotiorum." Canadian Journal of Botany 71, no. 12 (December 1, 1993): 1631–38. http://dx.doi.org/10.1139/b93-198.

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Among sclerotia of Sclerotinia sclerotiorum collected from diseased bean plants in a field near Lethbridge in 1987 and 1988, 30 and 16%, respectively, were contaminated by Trichothecium roseum. Laboratory studies showed that T. roseum is a mycoparasite of S. sclerotiorum, able to infect and destroy sclerotia in dual cultures on potato dextrose agar. Among sclerotia inoculated with spores of T. roseum and incubated for 4 weeks on moist sand, 54 and 43% were infected and killed by the isolates TR-4 and TR-6, respectively. Transmission electron microscopic studies of infected sclerotia revealed that hyphae of T. roseum entered the rind tissue by penetrating the melanized cell walls or via junctions between cells. Lysis of host cell walls occurred at penetration sites. Hyphae of T. roseum ramified in cortical and medullary tissues, destroying the sclerotium. In sclerotia with light infections of T. roseum, numerous cortical and (or) medullary cells showed cytoplasmic granulation and vacuolization without direct association with the mycoparasitic hyphae. Key words: biocontrol, hyperparasite, mycoparasitism.
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Sicuranza, Jenna, and Nathaniel A. Mitkowski. "The Production of Callus, Shoot, and Rooted Plantlets of Rhododendron catawbiense ‘English Roseum’ from Florets." HortScience 42, no. 2 (April 2007): 410–11. http://dx.doi.org/10.21273/hortsci.42.2.410.

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The Rhododendron catawbiense (Michx.) varieties ‘Roseum Elegans’ and ‘English Roseum’ are the primary varieties of rhododendron sold in the northeastern United States; however, very little research has been published on their ability to produce shoots, roots, or plantlets in tissue culture. The suitability of two rhododendron varieties (including ‘English Roseum’) was examined using two different combinations of cytokinin and auxin in Anderson's rhododendron medium. It was determined that the variety ‘Scintillation’ performed poorly regardless of the media conditions used; however, ‘English Roseum’ produced callus and shoots using Anderson's medium and 4.0 mg·L− 1 IAA and 15 mg·L− 1 2iP. Rooted plantlets were produced using a rooting medium containing Anderson's medium and 4 mg·L− 1 NAA. The ability of ‘English Roseum’ to produce 35% successful plantlets under these conditions suggests that this variety is moderately suitable for micropropagation purposes.
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Burtt, B. L. "Pseuderanthemum roseum again." Edinburgh Journal of Botany 54, no. 2 (July 1997): 253–54. http://dx.doi.org/10.1017/s0960428600004054.

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Luck, Brian T., Colette Breuil, and David L. Brown. "Immunological discrimination between a sap-staining fungus and a biological control fungus." Canadian Journal of Botany 68, no. 7 (July 1, 1990): 1578–88. http://dx.doi.org/10.1139/b90-203.

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An enzyme-linked immunosorbent assay (ELISA) was used to detect a sap-staining fungus, Ophiostoma piceae, and a biological-control agent, Gliocladium roseum, grown in liquid culture and in wood. A polyclonal serum prepared against whole cell fragments from broken mycelia of O. piceae detected O. piceae in liquid culture at 0.25 μg dry weight/mL; however, there was moderate cross-reactivity with G. roseum. Antiserum adsorbed on G. roseum had almost no reactivity with G. roseum but still reacted strongly with O. piceae. The specificity of these sera was verified, and the antigenic sites were localized, by immunogold labeling and electron microscopy. These studies confirmed that the adsorbed serum could differentiate between G. roseum and O. piceae and showed that the cell wall was the most reactive cellular component. These results are discussed in relation to the development of immunological probes for the detection of sap-staining and biological control fungi. Key words: polyclonal serum, enzyme-linked immunosorbent assay, immunogold labeling, sap-staining and biological control fungi, electron microscopy.
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WANG, LONG, CHEN REN, and QIN-ER YANG. "A new combination in Cremanthodium (Asteraceae, Senecioneae) from Sichuan, China." Phytotaxa 252, no. 2 (March 10, 2016): 137. http://dx.doi.org/10.11646/phytotaxa.252.2.6.

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Critical examination of herbarium specimens (including type material) of Cremanthodium ellisii var. roseum (Asteraceae, Senecioneae) has shown that the variety should be transferred to C. brunneopilosum. We therefore propose a new combination, C. brunneopilosum var. roseum.
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Hong, C. X., and T. J. Michailides. "Prune, Plum, and Nectarine as Hosts of Trichothecium roseum in California Orchards." Plant Disease 81, no. 1 (January 1997): 112. http://dx.doi.org/10.1094/pdis.1997.81.1.112d.

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Trichothecium roseum (Pers.:Fr.) Link was frequently observed (up to 21%) on mummified peach (Prunus persica (L.) Batsch), nectarine (P. persica (L.) Batsch var. nectarina (Aiton) Maxim.), plum (P. salicina Lindl.), and prune (P. domestica L.) fruits in orchards during a 1995 to 1996 survey. Pink mold rot caused by T. roseum was also frequently observed (at about the 1 to 2% level) on a number of samples of prune fruit collected from commercial orchards in Glenn, Butte, Madera, Fresno, and Tulare counties in 1996, after storage at 4°C for 7 days and then 20°C for 4 days. Wounded and nonwounded prune (cv. French), plum (cv. Casselman), peach (cv. Fairtime), and nectarine (cv. Spring Bright) fruits were infected after inoculation with a drop (20 μl) of T. roseum suspension (5 × 105 conidia/ml). Characteristic pink sporulation covered the surface of most fruit 7 days after inoculation. Conidia of T. roseum completely covered all wounded and nonwounded prune fruit, sparsely on the wounded plum fruit, and densely on both wounded and nonwounded peach and nectarine fruits (lesion diameter = 1 to 7 cm) 2 weeks after inoculation. T. roseum sporulated more rapidly and better on the fruits that were contaminated with either Monilinia fructicola (G. Wint.) Honey, or a Cladosporium sp. Peach has been listed as a host of T. roseum (California Plant Disease Host Index, Part 1: Fruits and Nuts, A M. French, ed., 1987), but this is the first report on the pathogenicity of this fungus on prune, plum, and nectarine from California.
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Dai, Pengbo, Yuanyuan Jiang, Xiaofei Liang, Mark L. Gleason, Rong Zhang, and Guangyu Sun. "Trichothecium roseum Enters ‘Fuji’ Apple Cores Through Stylar Fissures." Plant Disease 104, no. 4 (April 2020): 1060–68. http://dx.doi.org/10.1094/pdis-07-19-1559-re.

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Apple core rot, an economically important disease worldwide, appears both before and during harvest. Current gaps in understanding of the infection cycle impede progress toward more effective management of this disease. The fungus Trichothecium roseum is the main pathogen of core rot on apple in China. In this study, we used fluorescent labeling to trace colonization of T. roseum in floral tissues, characterizing routes of penetration to the core of ‘Fuji’ apples. T. roseum infected petals, anthers, filaments, stigmas and separated styles of flowers, and floral debris served as inoculum for core infection. In field inoculations, T. roseum entered styles initially through stylar fissures and colonized pluricellular hairs of these fissures during early stages of fruit development. Subsequently, hyphae grew along the extending fissures, which are continuations of stylar fissures located between stylar bases and carpel cavities. The hyphae remained in the extending fissures from mid-June to late July. When fruit developed an open sinus in late July, the sinus eventually fused with extending fissures and carpel cavities in late August, hyphae invaded carpel cavities, and ultimately fruit flesh via cracks on carpel cavity walls. Our results revealed for the first time the routes by which T. roseum penetrates apple fruit, and provided significant insights for strategic management of core rot.
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Pan, Hongyu, Yi Wei, Furong Xin, Mingguo Zhou, and Shihong Zhang. "Characterization and Biocontrol Ability of Fusion Chitinase in Escherichia coli Carrying Chitinase cDNA from Trichothecium roseum." Zeitschrift für Naturforschung C 61, no. 5-6 (June 1, 2006): 397–404. http://dx.doi.org/10.1515/znc-2006-5-616.

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The antifungal mechanism of mycoparasitic fungi involves fungal cell wall degrading enzymes such as chitinases. Trichothecium roseum is an important mycoparasitic fungus with significant antifungal ability, but studies on chitinases of T. roseum were poor. Here, we report a novel chitinase cDNA isolated from T. roseum by PCR amplification based on conserved chitinase sequences. Southern blot analysis suggested that a single copy of the gene exists in the genome of T. roseum. The deduced open reading frame of 1,143 nucleotides encodes a protein of 380 amino acids with a calculated molecular weight of 41.6 kDa. The fusion chitinase expressed in Escherichia coli has been purified by single-step chromatography. It has a pI of pH 5.4 and expresses a thermal stability, but is insensitive to pH in a broad pH range. According to expectation, E. coli efficiently yielded a high amount of active chitinase. Remarkably, the fusion chitinase offered high antifungal activity.
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Dissertations / Theses on the topic "Roseum"

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Shuttleworth, W. A. "Biodegradation of polycaprolactone polyurethane by Gliocladium roseum." Thesis, Cranfield University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380772.

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Blain, François 1964. "Phytotoxicity and pathogenicity of Fusarium roseum against red clover." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61848.

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Meier, Rose-Marie A. Carleton University Dissertation Chemistry. "Isolation and identification of minor metabolities from Fusarium roseum (ATCC 28115)." Ottawa, 1985.

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Barreto, Adolph Annderson Gonçalves Costa. "Caracterização físico-química, modelagem molecular e investigação da ação da lectina CRLII em processos inflamatórios e do potencial antitumoral das lectinas CRLI e CRLII." reponame:Repositório Institucional da UFC, 2016. http://www.repositorio.ufc.br/handle/riufc/26728.

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BARRETO, Adolph Annderson Gonçalves Costa. Caracterização físico-química, modelagem molecular e investigação da ação da lectina CRLII em processos inflamatórios e do potencial antitumoral das lectinas CRLII e CRLI. 2016. 99 f. Dissertação (Mestrado em Biotecnologia de Recursos Naturais)-Universidade Federal do Ceará, Fortaleza, 2016.
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Lectins are proteins of non-immune origin that have at least one non-catalytic site capable of recognizing carbohydrates in a specific and reversible manner without altering the structure of these molecules. These proteins are widely distributed in nature being found in microorganisms, invertebrate and vertebrate animals and in plants. In vegetables, lectins may be present in roots, stems, leaves, fruits and in seeds, where they are generally expressed in higher concentration. The most studied vegetable lectins are those found in the legume family in which is worth mentioning the subtribe Diocleineae, whose lectins present a peculiar post-translational processing, is characterized by an alpha chain formed by the junction and inversion of the beta and gamma fragments. The literature reports many biotechnological applications for different plant lectins, for example antimicrobial activity, antidepressive, pro and anti-inflammatory, induction of proliferation and cell death, anticancer activity among others. It is important to note that, although lectins are extremely structurally related, they behave very differently when compared in terms of potency in the evaluation of a given biological activity. In this way, investigating new lectins and their biotechnological potential is of enormous value in the discovery of new tools that can be used in different biological models, in the diagnosis and/or therapeutics in the various diseases that afflict human, vegetal and animal health. In this context, this work aimed to characterize physicochemically, to determine the three-dimensional structure and to evaluate the proinflammatory, anti-inflammatory and antiglioma activities of the specific lectin lactose Cymbosema roseum (CRLII), as well as to evaluate the antiglioma activity of the lectin specific mannose of Cymbosema roseum (CRLI) isolated from this plant seeds. CRLII presented optimum hemagglutinating activity (A.H.) in buffer solution with pH between 6 and 8, thermostability up to 40 ° C and the three-dimensional modeled structure presented similarity with the lectin from Vatairea macrocarpa (VML). Regarding the biotechnological potential in inflammation, CRLII showed anti-inflammatory activity via carbohydrate recognition domain (CRD) showing greater effect in the fourth hour. CRLII did not present pro-inflammatory activity. In tests on C6 lineage of Rattus norvegicus glioma cells, CRLII showed no ability to reduce viability, migration or cause changes in morphology and physiology in the cells tested, unlike CRLI which reduced the viability and migration of C6 lineage of Rattus norvegicus glioma cells line evidencing necrosis and apoptosis as mechanisms of cell death. New investigations must be carried out in order to better explain these effects and to establish structure / function correlations.
Lectinas são proteínas de origem não-imune que possuem pelo menos um sítio não catalítico capaz de reconhecer carboidratos de forma específica e reversível sem alterar a estrutura dessas moléculas. Essas proteínas estão vastamente distribuídas na natureza sendo encontradas em micro--organismos, animais invertebrados e vertebrados e em plantas. Em vegetais, as lectinas podem estar presentes em raízes, caules, folhas, frutos e sementes, onde são geralmente expressas em maior concentração. As lectinas vegetais mais bem estudadas são aquelas encontradas na família das leguminosas, merecendo destaque a subtribo Diocleineae, cujas lectinas apresentam um processamento pós-traducional peculiar, caracterizado por uma cadeia alfa formada pela junção e inversão dos fragmentos beta e gama. A literatura relata muitas aplicações biotecnológicas para diferentes lectinas vegetais, por exemplo atividade antimicrobiana, antidepressiva, pró e antiinflamatória, indução de proliferação e morte celular, atividade anticancerígena, dentre outras. É importante ressaltar que, embora existam lectinas extremamente relacionadas estruturalmente, elas se comportam de maneira muito diferente quando comparadas em termos de potência na avaliação de uma dada atividade biológica. Dessa forma, investigar novas lectinas e seu potencial biotecnológico é de enorme valia no que diz respeito à descoberta de novas ferramentas que possam ser utilizados em diferentes modelos biológicos, no diagnóstico e/ou terapêutica nas diversas enfermidades que afligem a saúde humana, vegetal e animal. Neste contexto, este trabalho objetivou caracterizar físico-quimicamente, determinar a estrutura tridimensional e avaliar as atividades pró-inflamatória, anti-inflamatória e antiglioma da lectina lactose específica Cymbosema roseum (CRLII), bem como, avaliar a atividade antiglioma da lectina manose específica de Cymbosema roseum (CRLI) purificadas a partir das sementes dessa planta. CRLII apresentou atividade hemaglutinante (A.H.) ótima em solução tampão com pH entre 6 e 8, termoestabilidade até 40◦C e estrutura tridimensional modelada apresentou semelhança com a lectina de Vatairea macrocarpa (VML). Quanto ao potencial biotecnológico em inflamação, CRLII apresentou atividade anti-inflamatória via sítio de reconhecimento de carboidratos (CRD) mostrando maior efeito na quarta hora. CRLII não apresentou atividade pró-inflamatória. Nos testes em células de glioma de Rattus norvegicus da linhagem C6, CRLII não demonstrou capacidade de reduzir a viabilidade, a migração ou causar alterações na morfologia e fisiologia nas células testadas, ao contrário de CRLI que reduziu a viabilidade e migração das células de glioma de Rattus norvegicus da linhagem C6 evidenciando necrose e apoptose como mecanismos de morte celular. Novas investigações devem ser realizadas a fim de melhor explicar esses efeitos e de se estabelecer correlações estrutura/função.
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Neto, Ito Liberato Barroso. "Aspectos estruturais do efeito vasorelaxante de lectinas de leguminosas." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12720.

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As lectinas sÃo proteÃnas multiativas que apresentam pelo menos um sÃtio capaz de reconhecer de maneira reversÃvel carboidratos especÃficos sem modificÃ-los. A famÃlia das lectinas de leguminosas representa o grupo desta classe proteica mais bem estudada, em especial destaque a subtribo Diocleinae. As lectinas de Diocleinae apresentam um alto grau de similaridade estrutural, porÃm o mesmo nÃo se observa quanto Ãs atividades biolÃgicas. Esta variabilidade reside em detalhes que podem ser analisados em estudos baseados em estruturas. A sequÃncia primÃria da lectina de C. grandiflora (ConGF) apresenta grande similaridade com lectinas do mesmo gÃnero, porÃm concentra o maior nÃmero de mutaÃÃes representativas do gÃnero Dioclea, caracterizando-o como o subgÃnero de Canavalia mais prÃximo de Dioclea, e dentre as canavalias à a mais primitiva. A ConGF apresentou efeito relaxante em mÃsculo liso de aortas de ratos endotelizadas, no entanto, os efeitos mostram-se fracos frente a outras lectinas de Diocleinae. A justificativa para este fato nÃo reside em uma baixa similaridade estrutural, mas em pequenas mudanÃas na orientaÃÃo de aminoÃcidos-chave, que se tornam responsÃveis pela diversidade na aÃÃo biolÃgica apresentada aqui, como deve ocorrer em outros fenÃmenos elicitados por lectinas. Para a lectina de Cymbosema roseum (CRLI), alÃm de avaliado o efeito relaxante, foi observado o papel do cÃlcio extracelular nesta atividade. Surpreendentemente, o cÃlcio nÃo foi definitivo para determinar o mecanismo de CRLI como dependente ou independente deste Ãon. Nossa investigaÃÃo permitiu a formulaÃÃo de uma hipÃtese em que esta lectina apresenta um duplo mecanismo de ativaÃÃo da Ãxido nÃtrico sintetase endotelial (eNOS). A primeira via à baseada em um receptor especÃfico na membrana do endotÃlio capaz de ativar a eNOS atravÃs da calmodulina. A segunda via à baseada na habilidade de ligaÃÃo de CRLI ao heparano sulfato do glicocÃlice em um sÃtio diferente do CRD demonstrada por docking molecular, o que justifica a ativaÃÃo mecÃnica da eNOS. Este proteoglicano à o principal candidato a mecanoreceptor da tensÃo de cisalhamento, principal fenÃmeno da manutenÃÃo do tÃnus vascular pela produÃÃo de NO. Dentre as proteÃnas de Diocleinae, foi ainda avaliada uma lectina do gÃnero Dioclea. D. sclerocarpa apresentou, como as outras lectinas deste trabalho, a habilidade de relaxar mÃsculos lisos de aortas. FenÃmeno que ocorreu com a dependÃncia do endotÃlio via produÃÃo de Ãxido nÃtrico e com a participaÃÃo do CRD de DSL. Tanto seu efeito como sua estrutura apresentam alto grau de semelhanÃa com lectinas do mesmo gÃnero e um conjuntos de caracterÃsticas corrobora para seu baixo efeito relaxante. DSL apresenta um desenho de CRD pouco favorÃvel para esta atividade e, alÃm disso, a presenÃa de um glutamato na posiÃÃo 205 demonstrou ser um fator determinante na regulaÃÃo desta atividade. Este resÃduo modula negativamente a capacidade relaxante frente a lectinas que do mesmo gÃnero que possuem um resÃduo de aspartato nesta mesma posiÃÃo.
Lectins are multiactive proteins that have at least one domain capable of recognizing specific carbohydrates reversibly without changing them. The legume lectin family is a group of this protein class further studied, in particular highlighted the subtribe Diocleinae. These lectins have a high degree of structural similarity, but it does not follow the biological activities. This variability must reside in details, small differences that can be analyzed in studies based in structures. The primary sequence of C. grandiflora lectin (ConGF) shows great similarity with lectins of the same genus, but it has the largest number of mutations representative of the genus Dioclea, characterizing it as the Canavalia subgenus closest to Dioclea, and it is the most primitive among the canavalias. ConGF presented relaxing effect on smooth muscles of endothelial aortas of rats; however, the effects are weak against other Diocleinae lectins. The justification for this does not lie in a low structural similarity but in small changes in the orientation of key amino acids residues, which become responsible for biological diversity in action presented here, as required in other phenomena elicited by lectins. For Cymbosema roseum lectin (CRLI), the relaxing effect was also evaluated and the role of extracellular calcium was observed for this activity. Surprisingly, the calcium was not definitive for determining CRLI mechanism as dependent or independent of calcium ions. Our research has led to the construction of a theory which this lectin has dual mechanism of nitric oxide synthase (eNOS) activation. The first path is based on a specific membrane endothelial receptor able to activate eNOS by calmodulin. The second path relies on the ability of CRLI binding to the glycocalyx heparano sulfate at a domain different from the CRD demonstrated by molecular docking, which explain mechanical activation of eNOS. This proteoglycan is the main mechanoreceptor candidate of shear stress and this phenomenon is the major agent of maintenance of vascular tone by NO production. A lectin from gender Dioclea was also evaluated to increase the range of legume proteins tested. As other lectins of this work, D. sclerocarpa presented the ability to relax smooth muscle of the aorta dependent on the endothelium nitric oxide production. Both its effect and its structure have a high degree of similarity with lectins of the same genus. A feature set corroborates with its low relaxant effect. DSL has a CRD design less favorable for this activity. In addition, the presence of a glutamate at position 205 proved to be a decisive factor in the activity regulation and it negatively modulates Dioclea lectins relaxant effect.
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Carvalho, Remulo Araujo. "Effect of microclimate on biological control of grey mould, Botrytis cinerea, by Gliocladium roseum in strawberries." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ33215.pdf.

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Constabel, Eva Caroline. "In vitro selection of red clover for resistance to Fusarium roseum L. and evaluation of regenerated plants." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61957.

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Courtade, Anne. "Étude des interactions plante / micro-organismes dans le modèle maïs - Pseudomonas fluorescens M. 3. 1. - Fusarium roseum." Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL022N.

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L’étude du modèle maïs (Zea mays l. ) - Pseudomonas fluorescens M. 3. 1. - Fusarium roseum a été réalisée afin d'évaluer la capacité de la bactérie, non seulement à limiter l'effet pathogène du champignon, mais aussi à stimuler la croissance du maïs. Pseudomonas fluorescens M. 3. 1. Produit in vitro de l'acide indole 3-acétique (AIA), des composés solubilisant les phosphates inorganiques, des sidérophores de type pyoverdine, de l'acide cyanhydrique (HCN) et du 2,4-diacetylphloroglucinol (DAPG). Par des cultures sur milieu gélose, nous montrons d'une part que la bactérie limite la croissance mycélienne de Fusarium roseum et d'autre part que la production d'HCN ou la présence de DAPG extrait de surnageant de cultures bactériennes ont aussi un effet inhibiteur sur le champignon. Par ailleurs, des dénombrements bactériens et des marquages au 14C réalisés lors de cultures hydroponiques indiquent que les exsudats racinaires du maïs sont consommés par la bactérie. Nous montrons aussi qu'elle produit du DAPG lors de cultures dans un milieu contenant des exsudats racinaires concentrés. La colonisation racinaire a été évaluée par technique ELISA. Pseudomonas fluorescens M. 3. 1. Colonisé de manière homogène le rhizoplan et l'endorhizosphère de la racine séminale principale et ceci plus intensément qu'une autre souche de Pseudomonas fluorescens isolée de la rhizosphère de la tomate. Lors de la co-inoculation des 2 souches, la colonisation par la souche M. 3. 1. Est stimulée. En présence de la bactérie, l'exsudation racinaire tend à être stimulée. La mesure de la masse de matière sèche des différents organes des plants de maïs âgés de 10 jours fait ressortir un effet variable de l'inoculation. Néanmoins, après 19 jours de culture, les racines sont plus fines quand elles se sont développées en présence de Pseudomonas fluorescens m. 3. 1. Dans ce cas, la co-inoculation avec Fusarium roseum permet de compenser la diminution de ramification due à la présence de l'agent pathogène
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Ceschi, Berrini Cristina. "Comunità fungina dei suoli agrari. Confronto tra due sistemi di conduzione: biologico e convenzionale." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3421730.

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Conventional farming using chemical fertilizers and pesticides improved the productivity of crops but caused a decline in soil fertility, an increase in environmental load and the present of pesticide residues in food. Concerns over environmental conservation and consumers perceptions about the safety of public health require the development of organic farming. In agricultural soil, fungi are critical to the maintenance of soil function because their involvement in key processes as: soil structure formation, nutrient cycling, decomposition of organic matter, plant growth promotion, induction of plant resistance. In contrast, other fungi are known to comprise some of the economically most serious plant pathogens especially Fusarium and Aspergillus genus. The aim of this work was to compare the structure of soil fungal communities from organic and conventional management. A particular attention was focused on the mycotoxigenic species and their potential antagonists as Trichoderma and Gliocladium. The employment of this microorganisms to control Fusarium Head Blight (FHB) of wheat appears to be one of the most interesting and promising. FHB can be caused by different pathogens and the most important is Fusarium graminearum, which can strongly reduce the yield and produce mycotoxins. Fungal community were investigated in relation to season, years, site sampling, crop rotation and system management. Mycological cultures allowed the isolation of 99 taxa. Altough the community structure was not statistically affected by different factors considered, 21 taxa were detected only in organic system and 7 taxa were found only in conventional system. MPN analysis results showed that Trichoderma, Fusarium and Aspergillus genus were not significantly affected by different factors. Gliocladium inoculum instead were significantly higher in organic management compared to the conventional one. Eight G. roseum strains isolated from soil samples were screened in dual culture bioassays. Results show that in pathogen-antagonist interactions some F. graminearum are inhibited by G. roseum but none of selected antagonists suppress all tested F. graminearum strains. The only three G. roseum strains shown a minimal inhibitory activity against F. graminearum, were tested against F. verticillioides, F. proliferatum, F. oxysporum, F. solani, F. culmorum and F. sporotrichioides. In this test, G. roseum always reduced the pathogen growth with decreases from 15 to 45% according to strains. G. roseum strains isolated from soil and selected for inhibition tests are scarcely able to carry out biocontrol against F. graminearum but are able to slow the development of others phytopathogenic Fusarium, showing a good biocontrol activity. In summary, our investigation based on 3-years management systems confirm what reported in literature. Soil fungal community was characterized by an elevated homeostasis and short-time effects of different soil managements can be very low. The fungal community structure observed regardless the “biological” value of species was not statistically different between organic and conventional but the organic management was characterized by a higher number of species than conventional. However, it has to be taken into account that the conversion of organic management was made only few years before this study was started. Therefore, the change in fungal community might be a first indicator of shifts in the community to occur some years after the change in agricultural management.
L'utilizzo in agricoltura convenzionale di fertilizzanti chimici e pesticidi ha migliorato la produttività delle colture, ma ha causato un declino nella fertilità del suolo, un aumento del carico ambientale e la presenza di residui di pesticidi negli alimenti. La crescente sensibilità dell’opinione pubblica nei confronti della tutela dell’ambiente, lo sviluppo di popolazioni di organismi patogeni resistenti ai fitofarmaci, la revoca dell’autorizzazione all’impiego di alcuni composti chimici e non ultima, la sempre più crescente attenzione da parte di produttori e consumatori alla salubrità dei prodotti alimentari, ha stimolato la ricerca di strategie alternative da utilizzare per un’agricoltura sostenibile. Negli agrosistemi i funghi sono fondamentali per il mantenimento della funzione del terreno, per il loro coinvolgimento nei processi chiave quali la formazione della struttura del suolo, il ciclo dei nutrienti, la decomposizione della materia organica, etc. Contrariamente, altri funghi sono conosciuti come patogeni delle colture da reddito. Tra questi, il genere Fusarium comprende specie responsabili di alcune patologie dei cereali come l' FHB (Fusarium head blight) nel frumento, che nel territorio nazionale è causata per lo più da Fusarium graminearum e i marciumi rosa e rossi (Pink and Red ear rot) nel mais. Tali malattie sono importanti non solo per la perdita in resa e qualità dei raccolti ma anche per la loro contaminazione da micotossine che determina una riduzione nella sicurezza degli alimenti destinati al consumo umano ed animale. Poiché la” driving force” di Fusarium è spesso rappresentata dall'inoculo del patogeno nel terreno, la gestione della comunità fungina del suolo potrebbe offrire una strategia utile alla riduzione di tali patologie. Anche se alcuni generi di funghi sono intensamente studiati, la struttura delle comunità fungine dei suoli agrari è spesso poco nota. Lo scopo di questo lavoro è stato quello di confrontare la struttura delle comunità fungine di suoli sottoposti a differenti sistemi di conduzione (biologico e convenzionale) in due aziende del Veneto. Le comunità fungine sono state indagate in relazione al tipo di conduzione, rotazione colturale, sito di campionamento, stagione e anno di raccolta. Una particolare attenzione è stata inoltre rivolta ai patogeni micotossigeni e ai loro potenziali agenti di biocontrollo appartenenti ai generi Trichoderma e Gliocladium. La protezione delle colture contro gli agenti patogeni, parassiti ed erbe infestanti, è una fase della produzione agricola in cui gli input chimici sono ancora abbastanza elevati. Un contributo alla riduzione di tali input potrebbe provenire dall’impiego di microrganismi con spiccate caratteristiche di antagonismo verso i patogeni, adatti a svilupparsi nel suolo, nel rispetto del naturale equilibrio biologico. La coltura micologica ha permesso l'isolamento di 99 taxa. Sebbene la struttura della comunità fungina, statisticamente non sia risultata influenzata dai diversi fattori considerati, 21 taxa sono stati rilevati esclusivamente nel sistema organico e 7 nel sistema convenzionale. Anche per le abbondanze dei generi Trichoderma, Fusarium e Aspergillus non state riscontrate differenze statisticamente significative mentre per il genere Gliocladium le abbondanze sono risultate significativamente più elevate nella conduzione biologica rispetto a quella convenzionale. Otto ceppi di G. roseum isolati dal suolo nel corso della sperimentazione, sono stati saggiati in colture duali per la loro capacità di inibizione della crescita di Fusarium graminearum e di altri Fusaria micotossigeni. I risultati mostrano come nelle interazioni patogeno-antagonista alcuni ceppi di F. graminearum siano risultati inibiti da G. roseum mentre per altri la crescita è stata promossa (rispetto al controllo). Nessuno dei ceppi di G. roseum da noi selezionati ha presentato un'azione antagonista nei confronti di tutti i ceppi di F. graminearum Tra tutti i ceppi di G. roseum saggiati contro F. graminearum, i tre ceppi che hanno manifestato una seppur minima attività inibitoria e che sono risultati anche i meno sensibili all'inibizione da parte del patogeno, sono stati testati contro: F. verticillioides, F. proliferatum, F. oxysporum, F. solani, F. culmorum e F. sporotrichioides. In questo caso, tutti i G. roseum sono riusciti a contenere lo sviluppo del patogeno con diminuzioni dal 15 al 45% ceppo dipendente, candidandosi come buoni agenti di biocontrollo. In conclusione il nostro studio condotto nell'arco di 3 anni sostanzialmente conferma quanto riportato in letteratura a riguardo dell’omeostasi delle comunità fungine del suolo. Anche se dal confronto tra la struttura delle comunità fungine dei due sistemi considerati non si sono riscontrate differenze statisticamente significative, la conduzione di tipo biologico è stata caratterizzata da una maggior ricchezza in specie e per il genere Gliocladium, da abbondanze più elevate. Tuttavia, è da prendere in considerazione che la conversione alla conduzione organica è stata effettuata solo pochi anni prima che questo studio fosse avviato. Pertanto, le variazione rilevate nella struttura della comunità fungina potrebbero costituire un primo indicatore di cambiamento
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Horan, Imelda. "Tissue culture of roses and its application to rose breeding." Thesis, University of East London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239147.

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Books on the topic "Roseum"

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Courdavault, Vincent, and Sebastien Besseau, eds. Catharanthus roseus. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2349-7.

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Naeem, M., Tariq Aftab, and M. Masroor A. Khan, eds. Catharanthus roseus. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51620-2.

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OL. Rosebud. Berlin: Jochen Enterprises, 1993.

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Stojević, Milorad. Rosebud. Zagreb: Hrvatsko društvo pisaca-Durieux, 2006.

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Adams, Faye. Rosebud. New York: Pocket Books, 1994.

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Stojević, Milorad. Rosebud. Zagreb: Hrvatsko društvo pisaca-Durieux, 2006.

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Holzer, Jenny. Rosebud. Munich: Städtische Galerie im Lenbachhaus München, 1994.

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Bemelmans, Ludwig. Rosebud. New York: Knopf, 1993.

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Rose's rainbow. Marton: Rockpool Children's Books Ltd, 2009.

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Wabbes, Marie. Rose's picture. London: Walker, 1988.

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Book chapters on the topic "Roseum"

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Sastry, K. Subramanya, Bikash Mandal, John Hammond, S. W. Scott, and R. W. Briddon. "Xanthosoma roseum (Elephant ear)." In Encyclopedia of Plant Viruses and Viroids, 2811. New Delhi: Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3912-3_1018.

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Mehdiyeva, Naiba P., Valida M. Alizade, Ketevan Batsatsashvili, Zaal Kikvidze, Manana Khutsishvili, Inesa Maisaia, Shalva Sikharulidze, David Tchelidze, Narel Y. Paniagua Zambrana, and Rainer W. Bussmann. "Pyrethrum parthenifolium Willd. Pyrethrum roseum (Adams) M. Bieb. Asteraceae." In European Ethnobotany, 557–61. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-49412-8_28.

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Mehdiyeva, Naiba, Valida Alizade, Ketevan Batsatsashvili, Zaal Kikvidze, Manana Khutsishvili, Inesa Maisaia, Shalva Sikharulidze, David Tchelidze, Narel Y. Paniagua Zambrana, and Rainer W. Bussmann. "Pyrethrum parthenifolium Willd. Pyrethrum roseum (Adams) M. Bieb. Rosaceae." In European Ethnobotany, 1–5. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50009-6_28-1.

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Yazaki, K., and T. Okuda. "Heterocentron roseum: In Vitro Culture and the Production of Ellagitannins." In Medicinal and Aromatic Plants VIII, 248–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-662-08612-4_13.

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Paniagua-Zambrana, Narel Y., Rainer W. Bussmann, and Carolina Romero. "Pelargonium odoratissimum (L.) L’Hér. Pelargonium roseum Willd. Pelargonium zonale (L.) L’Hér. Geraniaceae." In Ethnobotany of Mountain Regions, 1–6. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-77093-2_222-1.

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Paniagua-Zambrana, Narel Y., Rainer W. Bussmann, and Carolina Romero. "Pelargonium odoratissimum (L.) L’Hér. Pelargonium roseum Willd. Pelargonium zonale (L.) L’Hér. Geraniaceae." In Ethnobotany of Mountain Regions, 1385–90. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-28933-1_222.

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Knudsen, Inge M. B., Birgit Jensen, Dan Funck Jensen, and John Hockenhull. "Occurrence of Gliocladium Roseum on Barley Roots in Sand and Field Soil." In Developments in Plant Pathology, 33–37. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1698-2_5.

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Dahlsson, S.-O. "Observations of Fusarium roseum f. sp. cerealis (Snyd. & Hans.) on Turfgrasses in Sweden." In Proceedings of The Third International Turfgrass Research Conference, 469–71. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2135/1974.proc3rdintlturfgrass.c56.

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Sakurai, A., and S. Fujioka. "Catharanthus roseus (Vinca rosea): In Vitro Production of Brassinosteroids." In Biotechnology in Agriculture and Forestry, 87–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-08618-6_6.

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Ross, Ivan A. "Catharanthus roseus." In Medicinal Plants of the World, 175–95. Totowa, NJ: Humana Press, 2003. http://dx.doi.org/10.1007/978-1-59259-365-1_8.

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Conference papers on the topic "Roseum"

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Statsyuk, N. V., L. A. Shcherbakova, O. D. Mikityuk, T. A. Nazarova, and V. G. Dzhavakhiya. "Mycotoxin degradation by microbial metabolites." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.234.

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Extracellular metabolites of Gliocladium roseum GRZ7 are able to destroy aflatoxin B1 and zearalenone (by 61.9 and 68%, respectively). The determined optimum pH and temperature confirm the enzymatic nature of these metabolites.
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Valadão, Romulo, Natasha Barbosa, R. R. R. Coelho, LUCIELEN OLIVEIRA DOS SANTOS, and Mônica Monica Caramez Triches Damaso. "PRODUÇÃO DE TRANSGLUTAMINASE POR FERMENTAÇÃO NO ESTADO SÓLIDO UTILIZANDO Streptosporangium roseum." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Campinas - SP, Brazil: Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-33782.

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Shikov, AN, ON Pozharitskaya, VM Kosman, and VG Makarov. "Extraction of active compounds of Sedum roseum by natural deep eutectic solvent." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399882.

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Glos, Jennifer W., and Justine Cassell. "Rosebud." In CHI '97 extended abstracts. New York, New York, USA: ACM Press, 1997. http://dx.doi.org/10.1145/1120212.1120433.

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Yang, Min. "Analysis of qRed Rose and White Roseq from the Perspective of Psychoanalytic Criticism." In 3rd International Conference on Contemporary Education, Social Sciences and Humanities (ICCESSH 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/iccessh-18.2018.194.

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Joongsun Yoon and Hyeongsun Yoon. "A robot museum “ROSIEUM”." In 2011 8th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI 2011). IEEE, 2011. http://dx.doi.org/10.1109/urai.2011.6145905.

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Creus, Jordi, Bernd Amann, Nicolas Travers, and Dan Vodislav. "RoSeS." In the 20th ACM international conference. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/2063576.2064016.

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Capkun, Srdjan, Ercan Ozturk, Gene Tsudik, and Karl Wüst. "ROSEN." In CCS '21: 2021 ACM SIGSAC Conference on Computer and Communications Security. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3474123.3486763.

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Nikbakht Bideh, Pegah, and Christian Gehrmann. "RoSym." In CCS '22: 2022 ACM SIGSAC Conference on Computer and Communications Security. New York, NY, USA: ACM, 2022. http://dx.doi.org/10.1145/3560826.3563381.

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Lin, Yifan, and Sheng Dong. "Assessment of Seasonal Wind Energy at Zhifudao Observation Station Based on Joint Wind Speed and Wind Direction." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54634.

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The joint distribution of wind speed and direction is of great importance to the assessment and layout of wind farm, however it is constructed under the condition that the meteorological data of the regime under research is abundant. Based on the continuous angular-linear distribution model, an approach is proposed in this paper to establish the joint probabilistic distribution of wind speed and direction just by using the data of wind rose. The method is taken to construct the seasonal statistical models of wind regime at Zhifudao Observation Station located in Yantai, and in order to assess the fitness of the joint probabilistic models to the original wind roses, two kinds of coefficients of determination are calculated. The results show that the presented statistical models have high reliability and strong correlation with their original wind roses. After the feasibility of the method is certified, the statistical models are used to survey the wind power pattern with wind power roses of different seasons. Furthermore, the wind power output of a 2 MW vertical-axis wind turbine assuming to assigned here is predicted.
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Reports on the topic "Roseum"

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Percival, J. A. Roseau, Canada - Unites States. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/130234.

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Chupp, Timothy Edward. Rosen Scholar. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1599015.

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Tony Rogers. Rosebud Sioux Wind Energy Project. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/951198.

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Skone, Timothy J. Rosebud Surface Subbituminous Coal Mine, Operations. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1509121.

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Jackson, L. E. Surficial geology, Rosebud Creek, Yukon Territory. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/220180.

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Riveros, Guillermo, Felipe Acosta, Reena Patel, and Wayne Hodo. Computational mechanics of the paddlefish rostrum. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41860.

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Purpose – The rostrum of a paddlefish provides hydrodynamic stability during feeding process in addition to detect the food using receptors that are randomly distributed in the rostrum. The exterior tissue of the rostrum covers the cartilage that surrounds the bones forming interlocking star shaped bones. Design/methodology/approach – The aim of this work is to assess the mechanical behavior of four finite element models varying the type of formulation as follows: linear-reduced integration, linear-full integration, quadratic-reduced integration and quadratic-full integration. Also presented is the load transfer mechanisms of the bone structure of the rostrum. Findings – Conclusions are based on comparison among the four models. There is no significant difference between integration orders for similar type of elements. Quadratic-reduced integration formulation resulted in lower structural stiffness compared with linear formulation as seen by higher displacements and stresses than using linearly formulated elements. It is concluded that second-order elements with reduced integration and can model accurately stress concentrations and distributions without over stiffening their general response. Originality/value – The use of advanced computational mechanics techniques to analyze the complex geometry and components of the paddlefish rostrum provides a viable avenue to gain fundamental understanding of the proper finite element formulation needed to successfully obtain the system behavior and hot spot locations.
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Skone, Timothy J. Commissioning and Decommissioning of Rosebud Coal Mine. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1509018.

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Acosta, Felipe, Guillermo Riveros, Reena Patel, and Wayne Hodo. Numerical simulation of biological structures : paddlefish rostrum. Geotechnical and Structures Laboratory (U.S.), May 2019. http://dx.doi.org/10.21079/11681/32749.

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Kippen, Karen Elizabeth. Call for Rosen Scholar Nominations. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1341838.

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Skone, Timothy J. Rosebud Surface Sub-Bituminous Coal Mine Assembly, Construction. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1509120.

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