title: Membrane lipid remodelling of Meconopsis racemosa after its introduction into lowlands from an alpine environment.
abstract: Membrane lipids, which determine the integrity and fluidity of membranes, are sensitive to environmental changes. The influence of stresses, such as cold and phosphorus deficiency, on lipid metabolism is well established. However, little is known about how plant lipid profiles change in response to environmental changes during introduction, especially when plants are transferred from extreme conditions to moderate ones. Using a lipidomics approach, we profiled the changes in glycerolipid molecules upon the introduction of the alpine ornamental species Meconopsis racemosa from the alpine region of Northwest Yunnan to the lowlands of Kunming, China. We found that the ratios of digalactosyldiacylglycerol/monogalactosyldiacylglycerol (DGDG/MGDG) and phosphatidylcholine/phosphatidylethanolamine (PC/PE) remained unchanged. Introduction of M. racemosa from an alpine environment to a lowland environment results in two major effects. The first is a decline in the level of plastidic lipids, especially galactolipids. The second, which concerns a decrease of the double-bond index (DBI) and could make the membrane more gel-like, is a response to high temperatures. Changes in the lipidome after M. racemosa was introduced to a lowland environment were the reverse of those that occur when plants are exposed to phosphorus deficiency or cold stress.
authors.affiliation: Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, People's Republic of China; Plant Germplasm and Genomics Center, Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, People's Republic of China.
authors.forename: Guowei
authors.initials: G
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Tropical Plant Resource and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Tian
authors.affiliation: Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, People's Republic of China; Plant Germplasm and Genomics Center, Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, People's Republic of China.
authors.forename: Weiqi
authors.initials: W
authors.lastname: Li
mesh_terms: D000222:Adaptation, Physiological; D002681:China; D017753:Ecosystem; D005227:Fatty Acids / Q000378:metabolism*; D038983:Galactolipids; D008563:Membrane Lipids / Q000378:metabolism*; D028101:Papaveraceae / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism; D013312:Stress, Physiological; D013696:Temperature
chemical_list: D005227:Fatty Acids; D038983:Galactolipids; D008563:Membrane Lipids; C007388:digalactosyldiacylglycerol