Integrating physiological and metabolites analysis to identify ethylene involvement in petal senescence in Tulipa gesneriana
文献类型： 外文期刊
作者： Wang, Yaping 1 ; Zhao, Huimin 1 ; Liu, Chunli 1 ; Cui, Guangfen 2 ; Qu, Lianwei 3 ; Bao, Manzhu 1 ; Wang, Jihua 2 ; Chan, 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Hort & Forestry Sci, Key Lab Hort Plant Biol, Minist Educ, Wuhan, Peoples R China
2.Yunnan Acad Agr Sci, Kunming, Yunnan, Peoples R China
3.Liaoning Acad Agr Sci, Shenyang, Peoples R China
关键词： Petal senescence; Ethylene; Metabolic profiling; TgACS; Tulip
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）
ISSN： 0981-9428
年卷期： 2020 年 149 卷
页码：
收录情况： SCI
摘要： Flower senescence is classified into ethylene-dependent and ethylene-independent manners and determines the flower longevity which is valuable for ornamental plants. However, the manner of petal senescence in tulip is still less defined. In this study, we characterized the physiological indexes in the process of petal senescence, as well as metabolic and ethylene responses in tulip cultivar 'American Dream', and further identified the role of ethylene biosynthesis genes TgACS by transgenic and transient assays. Primary metabolites profiling revealed that sugars, amino acids and organic acids preferentially accumulated in senescent petals. Additionally, senescence-associated genes were identified and significantly up-regulated, coupled with increased ROS contents, rapid water loss and accelerated cell membrane breakdown. Moreover, ethylene production was stimulated as evidenced by increasing in ACS activity and ethylene biosynthesis-related genes expression. Exogenous treatment of cutting flowers with 1-MCP or ethephon resulted in delayed or enhanced petal senescence, respectively. Transient down-regulation of TgACS by VIGS assay in tulip petals delayed senescence, while over-expressed TgACS1 in tobacco promoted leaf senescence. Taken together, this study provides evidences to certify ethylene roles and TgACS functions during flower senescence in tulip.
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