干旱区生态环境知识资源中心(Arid): Adaptive responses to drought of two Retama raetam subspecies from Tunisia

Arid

DOI	10.1093/jpe/rtab007
	Adaptive responses to drought of two Retama raetam subspecies from Tunisia
	Gil, Ricardo; Zayoud, Dhikra; Ouerghi, Zeineb; Boscaiu, Monica; Vicente, Oscar; Neffati, Mohamed
通讯作者	Gil, R (corresponding author), Univ Politecn Valencia, Inst Biol Mol & Celular Plantas IBMCP, CSIC, Valencia 46022, Spain.
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2021
卷号	14 期号:3 页码:527-540
英文摘要	Aims The survival and ecological distribution of plants in arid habitats are mainly conditioned by water availability and physiological adaptations to withstand drought. In the present study, we have compared the physiological responses to drought of two Retama raetam (retama) subspecies from Tunisia, one of them living under the desert climate (subsp. raetam) and the other one growing on the coast (subsp. bovei). Methods To physiologically characterize the two R. raetam subspecies, and to elucidate their main mechanisms underlying their tolerance to drought stress, parameters related to seed germination, growth, photosynthesis (net photosynthetic rate, intracellular CO2 concentration, transpiration rate, stomatal conductance and water-use efficiency) and accumulation of osmolytes (proline, glycine betaine [GB] and soluble sugars) were determined in 4-month-old plants subjected to stress for up to 1 month. Important Findings Drought significantly inhibited germination, growth and all the evaluated photosynthetic parameters. Plants of R. raetam subsp. bovei were severely affected by drought after 3 weeks of treatment when photosynthesis rates were up to 7-fold lower than in the controls. At the same time, proline and GB significantly accumulated compared with the irrigated controls, but much less than in R. raetam subsp. raetam; in the latter subspecies, proline and GB increased to levels 24- and 6-fold higher, respectively, than in the corresponding controls. In summary, the population living in the desert region exhibited stronger tolerance to drought stress than that adapted to the semiarid littoral climate, suggesting that tolerance in R. raetam is dependent on accumulation of osmolytes.
英文关键词	germination leaf gas exchange osmolytes Retama raetam water stress xerophytes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000648966700014
WOS关键词	PLANT-RESPONSES ; SALT TOLERANCE ; WATER-STRESS ; PHOTOSYNTHESIS ; ACCUMULATION ; SALINITY ; PROLINE ; SEED
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350971
作者单位	[Gil, Ricardo; Zayoud, Dhikra] Univ Politecn Valencia, Inst Biol Mol & Celular Plantas IBMCP, CSIC, Valencia 46022, Spain; [Zayoud, Dhikra; Neffati, Mohamed] Univ Gabes, Inst Reg Arides, Lab Ecosyst Pastoraux & Valorisat Plantes Spontan, Medenine 4119, Tunisia; [Zayoud, Dhikra; Ouerghi, Zeineb] Fac Sci Tunis, Dept Biol, Tunis 1060, Tunisia; [Boscaiu, Monica] Univ Politecn Valencia, Inst Agroforestal Mediterraneo IAM, Valencia 46022, Spain; [Vicente, Oscar] Univ Politecn Valencia, Inst Conservac & Mejora Agrodiversidad Valenciana, Valencia 46022, Spain
推荐引用方式 GB/T 7714	Gil, Ricardo,Zayoud, Dhikra,Ouerghi, Zeineb,et al. Adaptive responses to drought of two Retama raetam subspecies from Tunisia[J],2021,14(3):527-540.
APA	Gil, Ricardo,Zayoud, Dhikra,Ouerghi, Zeineb,Boscaiu, Monica,Vicente, Oscar,&Neffati, Mohamed.(2021).Adaptive responses to drought of two Retama raetam subspecies from Tunisia.JOURNAL OF PLANT ECOLOGY,14(3),527-540.
MLA	Gil, Ricardo,et al."Adaptive responses to drought of two Retama raetam subspecies from Tunisia".JOURNAL OF PLANT ECOLOGY 14.3(2021):527-540.