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Dual functions of ZmNF-YA3 in photoperiod-dependent flowering and abiotic stress responses in maize

文献类型: 外文期刊

作者: Su, Huihui 1 ; Cao, Yingying 1 ; Ku, Lixia 1 ; Yao, Wen 1 ; Cao, Yanyong 3 ; Ren, Zhenzhen 1 ; Dou, Dandan 1 ; Wang, Huit 1 ;

作者机构: 1.Henan Agr Univ, Synerget Innovat Ctr Henan Grain Crops, Zhengzhou 450002, Henan, Peoples R China

2.Henan Agr Univ, Natl Key Lab Wheat & Maize Crop Sci, Zhengzhou 450002, Henan, Peoples R China

3.Henan Acad Agr Sci, Zhengzhou 450002, Henan, Peoples R China

关键词: CHIP-Seq; maize; photoperiod; qRT-PCR; regulatory pathway; stress tolerance

期刊名称:JOURNAL OF EXPERIMENTAL BOTANY ( 影响因子:6.992; 五年影响因子:7.86 )

ISSN: 0022-0957

年卷期: 2018 年 69 卷 21 期

页码:

收录情况: SCI

摘要: Nuclear factor-Y (NF-Y) transcription factors are important regulators of several essential biological processes, including embryogenesis, drought resistance, meristem maintenance, and photoperiod-dependent flowering in Arabidopsis. However, the regulatory mechanisms of NF-Ys in maize (Zea mays) are not well understood yet. In this study, we identified an NF-Y transcription factor, ZmNF-YA3. Genome-wide analysis showed that ZmNF-YA3 bound to >6000 sites in the maize genome, 2259 of which are associated with genic sequences. ZmNF-YA3 was found to interact with CONSTANS-like (CO-like) and flowering promoting factorl (FPF1) through yeast two-hybrid and bimolecular fluorescence complementation (BiFC) assays. Quantitative real-time reverse transcription-PCR (qRT-PCR) combined with yeast one-hybrid assay and EMSA suggested that NF-YA3 could promote early flowering by binding to the FLOWERING LOCUS T-like12 (FT-like12) promoter in maize. Morerover, we also showed that ZmNF-YA3 could improve drought and high-temperature tolerance through binding to the promoter regions of bHLH92, FAMA, and the jasmonic acid activator MYC4, respectively. These results contribute to a comprehensive understanding of the molecular mechanisms and regulatory networks of NF-Y transcription factors in regulating maize flowering time and stress response in maize.

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