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CsTFL1 inhibits determinate growth and terminal flower formation through interaction with CsNOT2a in cucumber

文献类型： 外文期刊

作者： Wen, Changlong 1 ; Zhao, Wensheng 3 ; Liu, Weilun 1 ; Yang, Luming 2 ; Wang, Yuhui 2 ; Liu, Xingwang 3 ; Xu, Yong 1 ; Ren 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Vegetables, Beijing Key Lab Vegetable Germplasms Improvement, BVRC, Beijing 100097, Peoples R China

2.Univ Wisconsin, Dept Hort, Madison, WI 53706 USA

3.China Agr Univ, Beijing Key Lab Growth & Dev Regulat Protected Ve, Dept Vegetable Sci, Beijing 100193, Peoples R China

4.China Agr Univ, Coll Biol Sci, State Key Lab Plant Physiol & Biochem, Beijing 100193, Peoples R China

5.USDA ARS, Vegetable Crops Res Unit, 1575 Linden Dr, Madison, WI 53706 USA

关键词： Cucumber; CsTFL1; Determinate growth; Fine mapping; CsNOT2a; Functional characterizations

期刊名称：DEVELOPMENT （ 影响因子：6.868； 五年影响因子：7.522 ）

ISSN： 0950-1991

年卷期： 2019 年 146 卷 14 期

页码：

收录情况： SCI

摘要： Cucumber (Cucumis sativus L.) is an important vegetable crop that carries on vegetative growth and reproductive growth simultaneously. Indeterminate growth is favourable for fresh market under protected environments, whereas determinate growth is preferred for pickling cucumber in the once-over mechanical harvest system. The genetic basis of determinacy is largely unknown in cucumber. In this study, map-based cloning of the de locus showed that the determinate growth habit is caused by a non-synonymous SNP in CsTFL1. CsTFL1 is expressed in the subapical regions of the shoot apical meristem, lateral meristem and young stems. Ectopic expression of CsTFL1 rescued the terminal flower phenotype in the Arabidopsis till-11 mutant and delayed flowering in wild-type Arabidopsis. Knockdown of CsTFL1 resulted in determinate growth and formation of terminal flowers in cucumber. Biochemical analyses indicated that CsTFL1 interacts with a homolog of the miRNA biogenesis gene CsNOT2a; CsNOT2a interacts with FDP. Cucumber CsFT directly interacts with CsNOT2a and CsFD, and CsFD interacts with two 14-3-3 proteins. These data suggest that CsTFL1 competes with CsFT for interaction with CsNOT2a-CsFDP to inhibit determinate growth and terminal flower formation in cucumber.

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