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Ubiquitylomes and proteomes analyses provide a new interpretation of the molecular mechanisms of rice leaf senescence

文献类型： 外文期刊

作者： Yu, Xiangzhen 1 ; Zhu, Yongsheng 1 ; Xie, Yunjie 1 ; Li, Lele 1 ; Jin, Ziyi 1 ; Shi, Yunrui 1 ; Luo, Cuiqin 1 ; Wei, Yidong 2 ; Cai, Qiuhua 2 ; He, Wei 2 ; Zheng, Yanmei 1 ; Xie, Huaan 1 ; Zhang, Jianfu 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou 350002, Peoples R China

2.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350018, Peoples R China

3.Natl Rice Improvement Ctr China, Incubator Natl Key Lab Germplasm Innovat & Mol Br, Minist Agr & Affairs, Key Lab Germplasm Innovat & Mol Breeding Hybrid R, Fuzhou 350003, Peoples R China

4.Natl Rice Improvement Ctr China, Minist Sci & Technol, Fujian Engn Lab Crop Mol Breeding, Fuzhou Branch,Fujian Key Lab Rice Mol Breeding, Fuzhou 350003, Peoples R China

关键词： Carbon fixation in photosynthetic organism pathway; Leaf senescence; Rice; psl86 mutant; Ubiquitin; proteasome system

期刊名称：PLANTA （ 影响因子：4.54； 五年影响因子：4.689 ）

ISSN： 0032-0935

年卷期： 2022 年 255 卷 2 期

页码：

收录情况： SCI

摘要： Main conclusion We identified a typical rice premature senescence leaf mutant 86 (psl86) and exhibited the first global ubiquitination data during rice leaf senescence. Abstract Premature leaf senescence affects the yield and quality of rice, causing irreparable agricultural economic losses. In this study, we reported a rice premature senescence leaf mutant 86 (psl86) in the population lines of rice (Oryza sativa) japonica cultivar 'Yunyin' (YY) mutagenized using ethyl methane sulfonate (EMS) treatment. Immunoblotting analysis revealed that a higher ubiquitination level in the psl86 mutant compared with YY. Thus, we performed the proteome and ubiquitylome analyses to identify the differential abundance proteins and ubiquitinated proteins (sites) related to leaf senescence. Among 885 quantified lysine ubiquitination (Kub) sites in 492 proteins, 116 sites in 94 proteins were classified as up-regulated targets and seven sites in six proteins were classified as down-regulated targets at a threshold of 1.5. Proteins with up-regulated Kub sites were mainly enriched in the carbon fixation in photosynthetic organisms, glycolysis/gluconeogenesis and the pentose phosphate pathway. Notably, 14 up-regulated Kub sites in 11 proteins were enriched in the carbon fixation in photosynthetic organism pathway, and seven proteins (rbcL, PGK, GAPA, FBA5, ALDP, CFBP1 and GGAT) were down-regulated, indicating this pathway is tightly regulated by ubiquitination during leaf senescence. To our knowledge, we present the first global data on ubiquitination during rice leaf senescence.

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