Floral-promoting GmFT homologs trigger photoperiodic after-effects: An important mechanism for early-maturing soybean varieties to regulate reproductive development and adapt to high latitudes

文献类型： 外文期刊

第一作者： Wang, Junya

作者： Wang, Junya;Yu, Lijie;Han, Tianfu;Wang, Junya;Xu, Xin;Wang, Peiguo;Zhang, Lixin;Liu, Lifeng;Liu, Luping;Wu, Tingting;Song, Wenwen;Yuan, Shan;Jiang, Bingjun;Hou, Wensheng;Wu, Cunxiang;Sun, Shi;Han, Tianfu

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关键词： flowering time; maintenance; maturity; photoperiod sensitivity

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.3； 五年影响因子：8.1 ）

ISSN： 0140-7791

年卷期： 2024 年 47 卷 5 期

页码：

收录情况： SCI

摘要： Soybean (Glycine max) is a typical short-day plant, but has been widely cultivated in high-latitude long-day (LD) regions because of the development of early-maturing genotypes which are photoperiod-insensitive. However, some early-maturing varieties exhibit significant responses to maturity under different daylengths but not for flowering, depicting an evident photoperiodic after-effect, a poorly understood mechanism. In this study, we investigated the postflowering responses of 11 early-maturing soybean varieties to various preflowering photoperiodic treatments. We confirmed that preflowering SD conditions greatly promoted maturity and other postflowering developmental stages. Soybean homologs of FLOWERING LOCUS T (FT), including GmFT2a, GmFT3a, GmFT3b and GmFT5a, were highly accumulated in leaves under preflowering SD treatment. More importantly, they maintained a high expression level after flowering even under LD conditions. E1 RNAi and GmFT2a overexpression lines showed extremely early maturity regardless of preflowering SD and LD treatments due to constitutively high levels of floral-promoting GmFT homolog expression throughout their life cycle. Collectively, our data indicate that high and stable expression of floral-promoting GmFT homologs play key roles in the maintenance of photoperiodic induction to promote postflowering reproductive development, which confers early-maturing varieties with appropriate vegetative growth and shortened reproductive growth periods for adaptation to high latitudes.

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