Transcriptome analysis ofleafynear-isogenic lines provides molecular insights into floral transition in maize (Zea mays)

文献类型： 外文期刊

第一作者： Du, Xuemei

作者： Du, Xuemei;Zhang, Jie;Zhen, Sihan;Wang, Jianhua;Gu, Riliang;Du, Xuemei;Wang, Xiaoli;Liu, Yunjun;Fu, Junjie;Wang, Guoying

作者机构：

关键词： floral transition; Lfy1mutant; maize; shoot apical meristem; transcriptome analysis

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 2020 年 139 卷 5 期

页码：

收录情况： SCI

摘要： Leafy(Lfy1) is a typical late-flowering mutant with locus being fine-mapped, but its underlying molecular mechanism is unknown. In this study, two near-isogenic lines, with and without theLfy1locus, were developed for phenotypic and transcriptional analysis ofLfy1-mediated floral transition. Phenotypic observation showed that wild-type (WT) plants transited into the tassel primordium at the V6 (6 expanded leaves) stage, whereas theLfy1mutant maintained the vegetative stage up to the V9 stage. Transcriptome analysis of shoot tips of both lines revealed more differentially expressed genes (DEGs) at the V5 (394) than the V3 stage (227). Functional enrichment analysis showed that circadian clock pathway genes exhibited lower expression levels in theLfy1mutant than in the WT at the V5 stage. A few integrator genes that functioned as downstream regulators of circadian clock genes also showed a lower transcript abundance in mutant lines, suggesting that theLfy1-mediated late-flowering phenotype was partially caused by inefficient expression of circadian clock pathway genes. These results provide molecular clues for the late-flowering phenotype of theLfy1mutant.

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