Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense

doi:10.1371/journal.pone.0103430

	Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense
	Li, Aihua 2,3; Wang, Dandan 2; Yu, Buzhu 2; Yu, Xiaomei 2; Li, Weiqi1,2 ; Li, WQ (reprint author), Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China.; weiqili@mail.kib.ac.cn
	2014-07-28
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	9 期号:7 页码:e103430
摘要	Resurrection plants usually grow in specific or extreme habitats and have the capacity to survive almost complete water loss. We characterized the physiological and biochemical responses of Paraisometrum mileense to extreme desiccation and found that it is a resurrection plant. We profiled the changes in lipid molecular species during dehydration and rehydration in P. mileense, and compared these with corresponding changes in the desiccation-sensitive plant Arabidopsis thaliana. One day of desiccation was lethal for A. thaliana but not for P. mileense. After desiccation and subsequent rewatering, A. thaliana showed dramatic lipid degradation accompanied by large increases in levels of phosphatidic acid (PA) and diacylglycerol (DAG). In contrast, desiccation and rewatering of P. mileense significantly decreased the level of monogalactosyldiacylglycerol and increased the unsaturation of membrane lipids, without changing the level of extraplastidic lipids. Lethal desiccation in P. mileense caused massive lipid degradation, whereas the PA content remained at a low level similar to that of fresh leaves. Neither damage nor repair processes, nor increases in PA, occurred during non-lethal desiccation in P. mileense. The activity of phospholipase D, the main source of PA, was much lower in P. mileense than in A. thaliana under control conditions, or after either dehydration or rehydration. It was demonstrated that low rates of phospholipase D-mediated PA formation in P. mileense might limit its ability to degrade lipids to PA, thereby maintaining membrane integrity following desiccation.
关键词	Phospholipase-d Haberlea-rhodopensis Sporobolus-stapfianus Xerophyta-viscosa Craterostigma-plantagineum Phosphatidic-acid Water-deficit Myrothamnus-flabellifolia Photosynthetic Activity Protection Mechanisms
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0103430
收录类别	SCI
语种	英语
WOS记录号	WOS:000339993700070
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/18321
专题	中国西南野生生物种质资源库
通讯作者	Li, WQ (reprint author), Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China.; weiqili@mail.kib.ac.cn
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Plant Germplasm & Genom Ctr, Germplasm Bank Wild Species, Kunming, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Aihua,Wang, Dandan,Yu, Buzhu,et al. Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense[J]. PLOS ONE,2014,9(7):e103430.
APA	Li, Aihua.,Wang, Dandan.,Yu, Buzhu.,Yu, Xiaomei.,Li, Weiqi.,...&weiqili@mail.kib.ac.cn.(2014).Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense.PLOS ONE,9(7),e103430.
MLA	Li, Aihua,et al."Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense".PLOS ONE 9.7(2014):e103430.

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