Turnover of Glycerolipid Metabolite Pool and Seed Viability
Hu, Xiao-Long1,2; Yu, Xiao-Mei1; Chen, Hong-Ying1,3; Li, Wei-Qi1,3
2018-05-01
发表期刊INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
ISSN1422-0067
卷号19期号:5
摘要Hydration-dehydration cycles can frequently cause stress to seeds, but can also be used to improve germination. However, the molecular basis of the stress caused is poorly understood. Herein, we examine the effects of hydration-dehydration cycles on seed viability and profile the membrane glycerolipid molecular species. We find that seed viability was not affected during the first two cycles, but significantly decreased as further cycles were applied, until all viability was lost. The abundances of seven glycerolipid classes increased and decreased through hydration and dehydration, respectively, but the phosphatidic acid and diacylglycerol abundances changed in the opposite sense, while total glycerolipid contents remained constant. This suggests that during hydration-dehydration cycles, turnover of glycerolipid metabolite pools take place, while no significant lipid synthesis or degradation is involved. As further hydration-dehydration cycles occurred, lipid unsaturation increased, plastidic lipids decreased, and phosphatidylserine acyl chains lengthened. The latter two could be lethal for seeds. Our findings reveal a novel model of membrane lipid changes, and provide new insights into the responses of seeds to hydration-dehydration cycles.
关键词Hydration-dehydration Cycle Membrane Lipids Seed Viability Phosphatidic Acid (Pa) Diacylglycerol (Dag)
DOI10.3390/ijms19051417
语种英语
WOS记录号WOS:000435297000153
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/61427
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China
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Hu, Xiao-Long,Yu, Xiao-Mei,Chen, Hong-Ying,et al. Turnover of Glycerolipid Metabolite Pool and Seed Viability[J]. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,2018,19(5).
APA Hu, Xiao-Long,Yu, Xiao-Mei,Chen, Hong-Ying,&Li, Wei-Qi.(2018).Turnover of Glycerolipid Metabolite Pool and Seed Viability.INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,19(5).
MLA Hu, Xiao-Long,et al."Turnover of Glycerolipid Metabolite Pool and Seed Viability".INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 19.5(2018).
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