干旱区生态环境知识资源中心(Arid): Preconditioning to Water Deficit Helps Aloe vera to Overcome Long-Term Drought during the Driest Season of Atacama Desert

Arid

DOI	10.3390/plants11111523
	Preconditioning to Water Deficit Helps Aloe vera to Overcome Long-Term Drought during the Driest Season of Atacama Desert
	Delatorre-Castillo, Jose P.; Delatorre-Herrera, Jose; Lay, Kung Sang; Arenas-Charlin, Jorge; Sepulveda-Soto, Isabel; Cardemil, Liliana; Ostria-Gallardo, Enrique
通讯作者	Ostria-Gallardo, E
来源期刊	PLANTS-BASEL
ISSN	2223-7747
出版年	2022
卷号	11 期号:11
英文摘要	Throughout evolution, plants have developed different strategies of responses and adaptations that allow them to survive in different conditions of abiotic stress. Aloe vera (L.) Burm.f. is a succulent CAM plant that can grow in warm, semi-arid, and arid regions. Here, we tested the effects of preconditioning treatments of water availability (100, 50, and 25% of soil field capacity, FC) on the response of A. vera to prolonged drought growing in the hyper-arid core of the Atacama Desert. We studied leaf biomass, biochemical traits, and photosynthetic traits to assess, at different intervals of time, the effects of the preconditioning treatments on the response of A. vera to seven months of water deprivation. As expected, prolonged drought has deleterious effects on plant growth (a decrease of 55-65% in leaf thickness) and photosynthesis (a decrease of 54-62% in E-max). There were differences in the morphophysiological responses to drought depending on the preconditioning treatment, the 50% FC pretreatment being the threshold to better withstand prolonged drought. A diurnal increase in the concentration of malic acid (20-30 mg mg(-1)) in the points where the dark respiration increased was observed, from which it can be inferred that A. vera switches its C3-CAM metabolism to a CAM idling mode. Strikingly, all A. vera plants stayed alive after seven months without irrigation. Possible mechanisms under an environmental context are discussed. Overall, because of a combination of morphophysiological traits, A. vera has the remarkable capacity to survive under severe and long-term drought, and further holistic research on this plant may serve to produce biotechnological solutions for crop production under the current scenario of climatic emergency.
英文关键词	succulence CAM water deprivation oxygen evolution hyper-arid
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000809111800001
WOS关键词	CRASSULACEAN ACID METABOLISM ; GUZMANIA-MONOSTACHIA ; HIGH-LIGHT ; STRESS ; PHOTOSYNTHESIS ; CAM ; SUCCULENCE ; PROTECTION ; TOLERANCE ; C-3
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393988
推荐引用方式 GB/T 7714	Delatorre-Castillo, Jose P.,Delatorre-Herrera, Jose,Lay, Kung Sang,et al. Preconditioning to Water Deficit Helps Aloe vera to Overcome Long-Term Drought during the Driest Season of Atacama Desert[J],2022,11(11).
APA	Delatorre-Castillo, Jose P..,Delatorre-Herrera, Jose.,Lay, Kung Sang.,Arenas-Charlin, Jorge.,Sepulveda-Soto, Isabel.,...&Ostria-Gallardo, Enrique.(2022).Preconditioning to Water Deficit Helps Aloe vera to Overcome Long-Term Drought during the Driest Season of Atacama Desert.PLANTS-BASEL,11(11).
MLA	Delatorre-Castillo, Jose P.,et al."Preconditioning to Water Deficit Helps Aloe vera to Overcome Long-Term Drought during the Driest Season of Atacama Desert".PLANTS-BASEL 11.11(2022).