文献类型：期刊文献

英文题名：Integrated Lipidomic and Transcriptomic Analysis Reveals Phospholipid Changes in Somatic Embryos of Picea asperata in Response to Partial Desiccation

作者：Ling, Juanjuan[1] Xia, Yan[1,2] Hu, Jiwen[1] Zhu, Tianqing[1] Wang, Junhui[1] Zhang, Hanguo[3] Kong, Lisheng[4]

第一作者：Ling, Juanjuan

通信作者：Zhu, TQ[1];Wang, JH[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry &, Beijing 100091, Peoples R China;[2]Southwest Univ, Coll Hort & Landscape Architecture, Key Lab Hort Sci Southern Mountains Reg, Minist Educ, Chongqing 400715, Peoples R China;[3]Northeast Forestry Univ, State Key Lab Tree Genet & Breeding, Harbin 150040, Peoples R China;[4]Univ Victoria, Dept Biol, Ctr Forest Biol, Victoria, BC V8P 5C2, Canada

年份：2022

卷号：23

期号：12

外文期刊名：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

收录：;Scopus(收录号：2-s2.0-85131743989);WOS:【SCI-EXPANDED(收录号:WOS:000816480000001)】；

基金：This work was supported by National Natural Science Foundation of China-Youth Science Fund (Grant no. 31901288).

语种：英文

外文关键词：Picea asperata; somatic embryo; partial desiccation treatment; phospholipids; phospholipid acid

摘要：Partial desiccation treatment (PDT) is an effective technology for promoting the germination and conversion of conifer somatic embryos (SEs). PDT, as a drought stress, induces intensive physiological responses in phospholipid metabolism, which are not well understood in the conifer SEs. Here, we integrated lipidomics, transcriptomics and proteomics analyses to reveal the molecular basis of lipid remodeling under PDT in Picea asperata SEs. Among the 82 lipid molecular species determined by mass spectrometry, phosphatidic acid (PA) had a significant effect after PDT and was the most critical lipid in the response to PDT. The transcriptomics results showed that multiple transcripts in the glycerolipid and glycerophospholipid metabolism pathways were differentially expressed, and these included five PLD alpha 1 transcripts that catalyze the conversion of phosphatidylcholine (PC) to PA. Furthermore, the enzyme activity of this phospholipase D (PLD) was significantly enhanced in response to PDT, and PDT also significantly increased the protein level of PLD alpha 1 (MA_10436582g0020). In addition, PA is a key factor in gibberellin, abscisic acid and ethylene signal transduction. One GDI1, one DELLA, three ABI1s, two SnRK2s, one CTR and 12 ERFs showed significantly differential expression between SEs before and after PDT in this study. Our data suggest that the observed increases in the PA contents might result from the activation of PLD alpha by PDT. PA not only affects the physical and chemical properties of the cell membrane but also participates in plant hormone signal transduction. Our work provides novel insight into the molecular mechanism through which PDT promotes the germination of SEs of coniferous tree species and fills the gap in the understanding of the mechanism of somatic embryo lipid remodeling in response to PDT.