DOI: 10.1016/j.bcab.2020.101531
论文题名: Eco-physiological responses of desert and riverain legume plant species to extreme environmental stress
作者: Ahmed Z.G. ; Radwan U. ; El-Sayed M.A.
刊名: Biocatalysis and Agricultural Biotechnology
ISSN: 18788181
出版年: 2020
卷: 24 语种: 英语
英文关键词: Antioxidant enzymes
; Chlorophyll fluorescence
; Drought stress
; Lablab purpureus
; Photosynthesis
; R. minima
; Transpiration
英文摘要: Drought and heat events frequency and severity are expected to increase in the near future as responses to global warming, influencing crops productivity and human diet as result in the increasing soil aridity and area affected by drought. It is becoming increasingly important to find new crop plants or genotypes of crops that have adaptation strategies to water loss at extreme arid conditions. It was hypothesized that growth and development of plants are affected differently by drought stress, depending on their nature habitats whether desert or riverain. In this current research, we compared the changes in physiological behavior between desert and riverain legume plants, as response to drought stress at two levels of water regimes. Rates of transpiration were highly correlated to radiation. Transpiration increases with the increase in photosynthetic active radiation (PAR) at both levels of water regimes. Highest photosynthesis (pn) and transpiration (E) were achieved in R. minima at both low water regime and high PAR (1250). The super oxide dismutase (SOD), catalase (CAT), phenyl ammonia lyase (PAL) and peroxidase activities were higher in Rhynchosia minima. Drought stress induced significant accumulation of total sugars, flavonoids, saponins, proteins and phenolics. The higher photosynthesis rate, higher flavonoids and phenolics content and stronger activity of protective enzymes were the important physiological reasons for the drought resistance of Rhynchosia minima. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159130
Appears in Collections: 气候变化与战略
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作者单位: Botany Department, Faculty of Sciences, Aswan University, Aswan, 81528, Egypt; Unit of Environmental Studies and Development, Aswan University, Aswan, 81528, Egypt
Recommended Citation:
Ahmed Z.G.,Radwan U.,El-Sayed M.A.. Eco-physiological responses of desert and riverain legume plant species to extreme environmental stress[J]. Biocatalysis and Agricultural Biotechnology,2020-01-01,24