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题名: Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense
作者: Li, Aihua2, 3; Wang, Dandan2; Yu, Buzhu2; Yu, Xiaomei2; Li, Weiqi1, 2
刊名: PLOS ONE
出版日期: 2014-07-28
卷号: 9, 期号:7, 页码:e103430
关键词: PHOSPHOLIPASE-D ; HABERLEA-RHODOPENSIS ; SPOROBOLUS-STAPFIANUS ; XEROPHYTA-VISCOSA ; CRATEROSTIGMA-PLANTAGINEUM ; PHOSPHATIDIC-ACID ; WATER-DEFICIT ; MYROTHAMNUS-FLABELLIFOLIA ; PHOTOSYNTHETIC ACTIVITY ; PROTECTION MECHANISMS
学科分类: Multidisciplinary Sciences
DOI: 10.1371/journal.pone.0103430
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
文章类型: Article
英文摘要: 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.
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
关键词[WOS]: PHOSPHOLIPASE-D ; HABERLEA-RHODOPENSIS ; SPOROBOLUS-STAPFIANUS ; XEROPHYTA-VISCOSA ; CRATEROSTIGMA-PLANTAGINEUM ; PHOSPHATIDIC-ACID ; WATER-DEFICIT ; MYROTHAMNUS-FLABELLIFOLIA ; PHOTOSYNTHETIC ACTIVITY ; PROTECTION MECHANISMS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000339993700070
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18321
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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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

Recommended Citation:
Li,Aihua;Wang,Dandan;Yu,Buzhu;Yu,Xiaomei;Li,Weiqi.Maintenance or Collapse: Responses of Extraplastidic Membrane Lipid Composition to Desiccation in the Resurrection Plant Paraisometrum mileense,PLOS ONE,2014,9(7):e103430
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