Antecedent Drought Condition Affects Responses of Plant Physiology and Growth to Drought and Post-drought Recovery

doi:10.3389/ffgc.2021.704470

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	Antecedent Drought Condition Affects Responses of Plant Physiology and Growth to Drought and Post-drought Recovery
	Li, Ximeng 1,2,3; Bao, Jingting 3,4; Wang, Jin 5; Blackman, Chris 3; Tissue, David 3
刊名	FRONTIERS IN FORESTS AND GLOBAL CHANGE
	2021-09-01
卷号	4
关键词	Eucalyptus camaldulensis drought non-structural carbohydrate photosynthesis stem growth post-drought recovery
DOI	10.3389/ffgc.2021.704470
英文摘要	Antecedent environmental conditions may have a substantial impact on plant response to drought and recovery dynamics. Saplings of Eucalyptus camaldulensis were exposed to a range of long-term water deficit pre-treatments (antecedent conditions) designed to reduce carbon assimilation to approximately 50 (A(50)) and 10% (A(10)) of maximum photosynthesis of well-watered plants (A(100)). Thereafter, water was withheld from all plants to generate three different levels of water stress before re-watering. Our objective was to assess the role of antecedent water limitations in plant physiology and growth recovery from mild to severe drought stress. Antecedent water limitations led to increased soluble sugar content and depletion of starch in leaves of A(50) and A(10) trees, but there was no significant change in total non-structural carbohydrate concentration (NSC; soluble sugar and starch), relative to A(100) plants. Following re-watering, A(50) and A(10) trees exhibited faster recovery of physiological processes (e.g., photosynthesis and stomatal conductance) than A(100) plants. Nonetheless, trees exposed to the greatest water stress (-5.0 MPa) were slowest to fully recover photosynthesis (A(max)) and stomatal conductance (g(s)). Moreover, post-drought recovery of photosynthesis was primarily limited by g(s), but was facilitated by biochemistry (V-cmax and J(max)). During recovery, slow regrowth rates in A(50) and A(10) trees may result from insufficient carbon reserves as well as impaired hydraulic transport induced by the antecedent water limitations, which was dependent on the intensity of drought stress. Therefore, our findings suggest that antecedent water stress conditions, as well as drought severity, are important determinants of physiological recovery following drought release.
WOS研究方向	Environmental Sciences & Ecology ; Forestry
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000696523300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148527]
专题	兰州理工大学
作者单位	1.Minzu Univ China, Coll Life & Environm Sci, Beijing, Peoples R China; 2.Minzu Univ China, Key Lab Ecol & Environm Minor Areas, Natl Ethn Affairs Commiss, Beijing, Peoples R China; 3.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia; 4.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou, Peoples R China; 5.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Shapotou Desert Expt & Res Stn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Li, Ximeng,Bao, Jingting,Wang, Jin,et al. Antecedent Drought Condition Affects Responses of Plant Physiology and Growth to Drought and Post-drought Recovery[J]. FRONTIERS IN FORESTS AND GLOBAL CHANGE,2021,4.
APA	Li, Ximeng,Bao, Jingting,Wang, Jin,Blackman, Chris,&Tissue, David.(2021).Antecedent Drought Condition Affects Responses of Plant Physiology and Growth to Drought and Post-drought Recovery.FRONTIERS IN FORESTS AND GLOBAL CHANGE,4.
MLA	Li, Ximeng,et al."Antecedent Drought Condition Affects Responses of Plant Physiology and Growth to Drought and Post-drought Recovery".FRONTIERS IN FORESTS AND GLOBAL CHANGE 4(2021).