Tomato SlCDF3 Delays Flowering Time by Regulating Different FT-Like Genes Under Long-Day and Short-Day Conditions
文献类型： 外文期刊
作者： Xu, Dawei 1 ; Li, Xueou 4 ; Wu, Xue 2 ; Meng, Lili 2 ; Zou, Zhirong 2 ; Bao, Encai 2 ; Bian, Zhonghua 1 ; Cao, Kai 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Key Lab Agr Engn Middle & Lower Reaches Yangtze R, Agr Minist, Nanjing, Peoples R China
3.Northwest A&F Univ, Hort Coll, Xianyang, Peoples R China
4.Shanghai Jiao Tong Univ, Sch Agr & Biol, Dept Plant Sci, Shanghai, Peoples R China
关键词： photoperiod; SlCDF3; FT-like gene; flowering time; tomato
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.402； 五年影响因子：5.207 ）
ISSN： 1664-462X
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： Photoperiod is a crucial inducer of plant flowering. Cycling DOF factors (CDFs) play pivotal roles in the flowering of long-day (LD) and short-day (SD) plants. However, the functions of CDFs in the photoperiod regulated flowering remain unclear in day-neutral plants. In the present study, tomato (Solanum lycopersicum L. cv. "Ailsa Craig") seedlings of the wild-type and transgenic lines of overexpressing CDFs were treated with different photoperiods. The flowering time and the expression pattern of SlCDFs and other FT-like genes were investigated. The results showed that tomato SlCDF1, SlCDF2, SlCDF3, SlCDF4, and SlCDF5 are homologs to Arabidopsis cycling DOF factor 1 (AtCDF1). SlCDF1-5 expression levels were influenced by the developmental stage and the tissue location, and notably, the expression patterns throughout light environments showed two opposite trends. Among the SlCDF1-5 overexpression transgenic lines, overexpressing SlCDF3 delayed flowering time in both LD (16 h light/8 h dark) and SD (8 h light/16 h dark) conditions. Furthermore, SlCDF3 led to an increase in the mRNA level of SlSP5G, a tomato FT-like gene, in LD conditions, while the transcription level of the other two FT-like genes, SlSP5G2 and SlSP5G3, were up-regulated in SD conditions. Taken together, at the transcription level, our results demonstrated that SlCDF3 played a significant role in controlling tomato flowering under LD and SD conditions, possibly through directly or indirectly regulating FT-like genes.
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