Lipidomic and transcriptomic analysis reveals reallocation of carbon flux from cuticular wax into plastid membrane lipids in a glossy“Newhall”navel orange mutant

查看全文 作　　者：Haoliang [1]Wan;Hongbo [2]Liu;Jingyu [1]Zhang;Yi [3]Lyu;Zhuoran [1]Li;Yizhong [1]He;Xiaoliang [1]Zhang;Xiuxin [1]Deng;Yariv [4]Brotman;Alisdair [5]RFernie;Yunjiang [1]Cheng;Weiwei [1]Wen

机构地区：[1]Key Laboratory of Horticultural Plant Biology(MOE),College of Horticulture and Forestry Sciences,Huazhong Agricultural University,430070 Wuhan,China;[2]National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,430070 Wuhan,China;[3]Key Laboratory for Space Bioscience and Biotechnology,School of Life Sciences,Northwestern Polytechnical University,Youyi Xilu 127,Xi’an 710072 Shaanxi,China;[4]Department of Life Sciences,Ben-Gurion University of the Negev,Beersheba,Israel;[5]Max-Planck-Institute of Molecular Plant Physiology,Am Muehlenberg 1,14476 Potsdam,Germany

出　　处：《Horticulture Research》索引2020年第7卷第1期,共18页

基　　金：financed by funding from the National Natural Science Foundation of China(31772261);the Huazhong Agricultural University Scientific&Technological Self-Innovation Foundation granted to W.W. 摘　　要：Both cuticle and membrane lipids play essential roles in quality maintenance and disease resistance in fresh fruits.Many reports have indicated the modification of alternative branch pathways in epicuticular wax mutants;however,the specific alterations concerning lipids have not been clarified thus far.Here,we conducted a comprehensive,timeresolved lipidomic,and transcriptomic analysis on the“Newhall”navel orange(WT)and its glossy mutant(MT)“Gannan No.1”.The results revealed severely suppressed wax formation accompanied by significantly elevated production of 36-carbon plastid lipids with increasing fruit maturation in MT.Transcriptomics analysis further identified a series of key functional enzymes and transcription factors putatively involved in the biosynthesis pathways of wax and membrane lipids.Moreover,the high accumulation of jasmonic acid(JA)in MT was possibly due to the need to maintain plastid lipid homeostasis,as the expression levels of two significantly upregulated lipases(CsDAD1 and CsDALL2)were positively correlated with plastid lipids and characterized to hydrolyze plastid lipids to increase the JA content.Our results will provide new insights into the molecular mechanisms underlying the natural variation of plant lipids to lay a foundation for the quality improvement of citrus fruit. 关键词：ORANGE carbon concerning

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Lipidomic and transcriptomic analysis reveals reallocation of carbon flux from cuticular wax into plastid membrane lipids in a glossy“Newhall”navel orange mutant

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