Bibliographies thématiques / Poa bulbosa

Littérature scientifique sur le sujet « Poa bulbosa »

Auteur : Grafiati
Publié le 25 juillet 2024

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Articles de revues sur le sujet "Poa bulbosa"

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Cusick, Allison W. « Poa bulbosa Subsp. Bulbosa (Poaceae) in North America : An Update ». Rhodora 115, no 963 (juillet 2013) : 293–95. http://dx.doi.org/10.3119/13-04.

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Kaybeleva, Elmira I., Ekaterina A. Arkhipova, Olga I. Yudakova et Maxim Yu Voronin. « The Poa bulbosa L. Reproductive Strategy in the Steppe Phytocenoses of the Lower Volga Region ». Izvestiya of Saratov University. New Series. Series : Chemistry. Biology. Ecology 20, no 4 (23 novembre 2020) : 395–403. http://dx.doi.org/10.18500/1816-9775-2020-20-4-395-403.

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Poa bulbosa L. is a native cereal of the European and Mediterranean flora and an invasive species in North America. The study of its reproductive strategy in different environmental and climatic conditions is important for the development of effective methods of containment and prevention of invasions. Plants of two coenopopulations were investigated embryologically. In addition, the morphology of reproductive organs was analyzed in 175 herbarium specimens collected in the flora of the Lower Volga region from 1919 to 2017. It was found that in the steppe phytocenoses of the Lower Volga region P. bulbosa reproduce mainly vegetatively by basal bulbs and pseudoviviparous bulblets. Rarely, seed mode reproduction in the form of facultative apomixis is realized. There was no dependence of the mode of reproduction (pseudovivipary / seed reproduction) on the date of growing season beginning and on the average temperature in the period from the beginning of the growing season to flowering. The effectiveness of pseudovivipary is low due to the aridity of the Lower Volga region climate. Bulblets germinate in inflorescences and then dry. This holds back the P. bulbosa wider distribution in the studied region.
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Volaire, Florence, Geneviève Conéjero et François Lelièvre. « Drought survival and dehydration tolerance in Dactylis glomerata and Poa bulbosa ». Functional Plant Biology 28, no 8 (2001) : 743. http://dx.doi.org/10.1071/pp00162.

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To analyse the contribution of dormancy and dehydration tolerance to drought survival of perennial grasses, we compared Poa bulbosa L., which is classified as a resurrection plant, with one of the most drought resistant cultivars of MediterraneanDactylis glomerata L. Comparing periods when dormancy was induced in Poa (summer) and not induced (winter), we aimed to ascertain the presence of differential plant responses between dormancy and dehydration tolerance and to characterise water status, sugar and dehydrin accumulation in surviving organs of Poa and Dactylis, in relation to their ability to survive intense drought. Irrespective of the dormancy status of Poa, the bulbs of this species had a final water content lower than 10% and survived an extreme drought. This could be associated with the accumulation of sucrose and the expression of a high number (>10) of dehydrins that peaked when the water content of the bulbs fell below 50%, whether this dehydration was due to dormancy induction or increasing soil water deficit. The independence of dormancy to dehydration tolerance was reinforced by the expression of a specific dehydrin (approx. 28 kDa) found only in irrigated, but dormant, tissues of Poa. The Dactylis exhibited contrasting survival between experiments (46 and 0% after a summer and winter drought, respectively). The mortality was associated with a significantly higher rate of decrease of the membrane stability of leaf bases of Dactylis in winter and with barely detectable amounts of sucrose contents in droughted roots. However, neither the water-soluble carbohydrate concentration in leaf bases nor the overall accumulation of dehydrins could be related to the contrasting survival of this Dactylis between the two seasons. Since in seeds of Poa and Dactylis, the accumulation of dehydrins was comparable with that found in droughted aerial tissues of the same species, the expression of these proteins must interact with other mechanisms to confer dehydration tolerance.
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Dzhapova, Vita, Nikita Jimbeev et Denis Budaev. « Summer Food Ration of the Microtus Socialis Pall. at Chernye Zemli of the Republic of Kalmykia ». Полевые исследования 7, no 7 (10 novembre 2020) : 17–24. http://dx.doi.org/10.22162/2500-4328-2020-7-17-24.

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Цель настоящего исследования — определить состав летнего рациона Microtus socialis Pall. (общественная полевка). Материал и методы. Материалы по составу летнего рациона Microtus socialis Pall. получены на территории Черных земель (северо-западный Прикаспий) Республики Калмыкия с использованием метода кутикулярного микрогистологического анализа экскрементов. Результаты. В рационе общественной полевки выявлено 26 видов растений. Основу летнего рациона составляют злаки (54 %), преимущественно Poa bulbosa. Разнотравье потребляется общественной полевкой в несколько меньшем количестве (46 %), но также играет важную роль в питании в летний период. Выводы. Основу летнего рациона Microtus socialis Pall. на Черных землях составляют вегетативные и генеративные органы эфемероида Poa bulbosa. Преобладание мятлика луковичного в летнем рационе связано с тем, что и после завершения вегетации луковицы этого вида сохраняются до начала нового вегетационного сезона, являясь легкодоступным кормом.
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OFIR, M. « Seasonal Changes in the Response to Temperature of Summer-dormant Poa bulbosa L. Bulbs ». Annals of Botany 58, no 1 (juillet 1986) : 81–89. http://dx.doi.org/10.1093/oxfordjournals.aob.a087190.

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Sadyrova, Gulbanu, Ainur Tanybaeva, Tursynkul Bazarbaeva, Gulzhanat Mukanova et Saule Dzhamilova. « DIVERSITY OF DESERT VEGETATION OF THE KETPEN RIDGE ». Eurasian Journal of Ecology 79, no 2 (2024) : 119–26. http://dx.doi.org/10.26577/eje.2024.v79.i2-011.

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The article presents the results of many years of research into the desert vegetation of the Ketpen ridge. The paper presents an analysis of the desert vegetation of the Ketpen ridge. Within the study area, desert vegetation is represented by various communities. Communities with Artemisia stand out here, these are Artemisia terrae-albae; Salsola orientalis + Artemisia terrae albae, and Salsola orientalis + Artemisia terrae - albae + Haloxylon aphyllum associations. The total projective cover in these communities ranges from 25 to 70%, artemisia cover is 25-30%. They always include short-vegetating (Poa bulbosa, 8-10%) and long-vegetating (Stipa caucasica, 15-25%). Subshrubs include Salsola orientalis, Salsola arbusculiformis, Anabasis salsa, and Nanophyton erinaceum. Annual saltwort species are also abundant: Petrosimonia sibirica, Climacoptera brachiata, Girgensohnia oppositiflora, Climacoptera lanata. These communities are more saturated with ephemerals and ephemeroids, forming ephemeral-artemisia groups of communities. Artemisia sublessingiana + Artemisia terrae-albae stand out; Stipa caucasica + Artemisia sublessingiana + Artemisia sublessingiana; Artemisia terrae-albae + Stipa capillata; Ceratocarpus utriculosus + Artemisia terrae-albae associations. The grass herbage contains: Festuca sulcata, Poa stepposa, Poa bulbosa, Stipa caucasica; from forbs - Ceratocarpus utriculosus, C. arenaria, Climacoptera brachiata, as well as weeds and poisonous plants: Goebelia pachycarpa, Acroptilon repens, Xanthium strumarium, Urtica dioica, Atriplex tatarica and others.
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Anzhaev, Nikolay Olegovizh, Savr Hongorovyzh Borlykov, Zhanna Vasilevna Ovadykova et Nina Tserenovna Lidzhieva. « ИЗМЕНЧИВОСТЬ МОРФОЛОГИЧЕСКОЙ СТРУКТУРЫ РАСТЕНИЙ В ЦЕНОПОПУЛЯЦИЯХ TULIPA BIEBERSTEINIANA SCHULT. ET SCHULT. (LILIACEAE) В УСЛОВИЯХ КАЛМЫКИИ ». Siberian Journal of Life Sciences and Agriculture 12, no 5 (13 septembre 2020) : 22. http://dx.doi.org/10.12731/2658-6649-2020-12-5-22-31.

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В статье приведены данные по изучению изменчивости морфологической структуры растений в популяциях Tulipa biеbersteiniana Schult. et Schult. (Liliaceae), произраставщих в пределах двух крупных геоморфологических структур Республики Калмыкия – Прикаспийской низменности и Долине Маныча. В Долине Маныча видовая популяция № 1 произрастала в составе разнотравно-злакового (Poaceae-Mixteherbosa) сообщества и ценопопуляцию № 2 в составе разнотравно-типчаково-полынкового (Artemisia austriaca-Festuca valesiaca-Mixteherbosa) сообщества, произрастающих на лугово-каштановых почвах. В Прикаспийской низменности видовая популяция № 3 входила в состав эфемерово-луковичномятликового (Poa bulbosa-Ephemerosa) сообщества; ценопопуляцию № 4 в состав эфемерово-луковичномятликово-лерхополынное (Artemisia lercheana-Poa bulbosa-Ephemerosa) сообщества, которые произрастают бурых пустынно-степных солонцеватых почвах.Растения из ценопопуляций T. biеbersteiniana, произрастающих в Долине Маныча, имели большие значения признаков, чем ценопопуляции с Прикаспийской низменности. В ценопопуляциях T. biеbersteiniana наибольшее значение всех признаков растений отмечали в 2017 году, наименьшее – в 2016 году, что свидетельствует о более благоприятных для роста и развития растений погодных условиях в этот год.В ценопопуляциях T. biеbersteiniana девять морфологических признаков, характеризующих вегетативную и генеративную сферу растений варьрировали в 2016 на высоком и среднем уровнях изменчивости, в 2017 году – преимущественно на высоком уровне изменчивости.
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Ofir, Micha, et Jaime Kigel. « Temporal and intraclonal variation of flowering and pseudovivipary in Poa bulbosa ». Annals of Botany 113, no 7 (30 mars 2014) : 1249–56. http://dx.doi.org/10.1093/aob/mcu037.

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Galán de Mera, Antonio, et José A. Vicente Orellana. « Sobre las comunidades con Poa bulbosa (Poaceae) del Medio Atlas Central (Marruecos) ». Acta Botanica Malacitana 22 (1 décembre 1997) : 227–30. http://dx.doi.org/10.24310/abm.v22i0.8644.

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Ofir, Micha, et Jaime Kigel. « Regulation of Summer Dormancy by Water Deficit and ABA in Poa bulbosa Ecotypes ». Annals of Botany 99, no 2 (3 janvier 2007) : 293–99. http://dx.doi.org/10.1093/aob/mcl257.

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Livres sur le sujet "Poa bulbosa"

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Locke, Kerry A. Bulbous bluegrass, Poa bulbosa L. [Corvallis, Or.] : Oregon State University Extension Service, 1994.

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Locke, Kerry. Bulbous bluegrass, Poa bulbosa L. [Corvallis, Or.] : Oregon State University Extension Service, 1994.

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Actes de conférences sur le sujet "Poa bulbosa"

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YUFEREV, Valeriy, et Natalya TKACHENKO. « ANALYSIS OF THE SPECTRAL CHARACTERISTICS OF DESERT LANDSCAPES OF THE NORTH-WESTERN CASPIAN ». Dans Land Degradation and Desertification : Problems of Sustainable Land Management and Adaptation. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1718.978-5-317-06490-7/244-248.

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Studies of the thermodynamic characteristics of semi-desert landscapes were carried out with the PSR-1100 Spectroradiometer in the range from 320 to 1100 nm. Energy distribution data for the parts of the spectrum for plant phytocenosis Poa bulbosa, Descurainia Sophia were obtained from the energy brightness distribution spectrogram at the Tavn-Gashun test site.
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Nishita, Yoshiki, et Masashi Yamada. « Impression Changes of a Live Stage by Lighting in Terms of a Virtual Pop Idol Show ». Dans 14th International Conference on Applied Human Factors and Ergonomics (AHFE 2023). AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1002994.

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In recent years, LEDs have replaced halogen bulbs or incandescent bulbs for lights on stages. The response time of the LEDs is shorter than those of halogen bulbs and incandescent bulbs, therefore it has become easier to control lights temporally and complex lighting patterns are being used for live music shows especially in pop music. Due to the COVID-19 pandemic, internet distribution of concerts has become popular. Especially, virtual idol’s live shows (-e.g., Hatsne Miku’s live shows-) have become very popular in the two years in Japan. In the present study, audio-visual stimuli with different areas of the stage illuminated by lights and the various colors of the illumination were prepared and live pop music shows performed by a virtual idol, Miss Monochrome were synthesized using the software SHOWMAKER. In Experiment 1, the color of the lights was fixed at light blue, and the area of the lights illuminated on the stage was varied for the live music stage performed by the virtual idol. These 30 synthesized videos were used as stimuli in a perceptual experiment. Fifteen participants rated their impressions of the video stimuli using the semantic differential method. The results of factor analysis showed that the impressions were spanned by three factors, power, tension and tightness. It was also shown that the wider the area illuminated, the more powerful and tighter it come to be perceived. In Experiment 2, nine different areas of illumination on the stage were selected from the areas used in Experiment 1, and twelve colors of the lights were selected from the color wheel. Then 97 stimuli were constructed. Fifteen participants were presented the stimuli through a computer monitor and headphones, and requested to rate the impressions of each of them using 24 paired semantic differential scales. The results of the factor analysis showed that the impressions of the stimuli were illustrated by a three-dimensional space spanned by power, tension and lightness. The results also showed that the wider the area illuminated, the more powerful and tighter it come to be perceived. Moreover, a warm color of the lights was perceived as tense and a cool color was perceived as loose. A prime color was perceived as heavy and a mixed color was perceived as light.
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Rapports d'organisations sur le sujet "Poa bulbosa"

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Ardoin, Caleb Elie. Intraspecific Hybridization of Poa bulbosa L. for Use as a Perennial Groundcover. Ames (Iowa) : Iowa State University, décembre 2022. http://dx.doi.org/10.31274/cc-20240624-923.

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