Ethylene promotes seed iron storage duringArabidopsisseed maturation via ERF95 transcription factor
文献类型： 外文期刊
作者： Sun, Ying 1 ; Li, Jia Qi 1 ; Yan, Jing Ying 2 ; Yuan, Jun Jie 1 ; Li, Gui Xin 3 ; Wu, Yun Rong 1 ; Xu, Ji Ming 1 ; Huang, 1 ;
作者机构： 1.Zhejiang Univ, Coll Life Sci, State Key Lab Plant Physiol & Biochem, Hangzhou 310058, Peoples R China
2.Zhejiang Univ, Agr Expt Stn, Hangzhou 310058, Peoples R China
3.Zhejiang Univ, Coll Agron & Biotechnol, Hangzhou 310058, Peoples R China
4.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China
5.Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, England
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）
ISSN： 1672-9072
年卷期： 2020 年 62 卷 8 期
页码：
收录情况： SCI
摘要： Because Iron (Fe) is an essential element, Fe storage in plant seeds is necessary for seedling establishment following germination. However, the mechanisms controlling seed Fe storage during seed development remain largely unknown. Here we reveal that an ERF95 transcription factor regulatesArabidopsisseed Fe accumulation. We show that expression ofERF95increases during seed maturation, and that lack of ERF95 reduces seed Fe accumulation, consequently increasing sensitivity to Fe deficiency during seedling establishment. Conversely, overexpression ofERF95has the opposite effects. We show that lack of ERF95 decreases abundance ofFER1messenger RNA in developing seed, which encodes Fe-sequestering ferritin. Accordingly, afer1-1loss-of-function mutation confers reduced seed Fe accumulation, and suppresses ERF95-promoted seed Fe accumulation. In addition, ERF95 binds to specificFER1promoter GCC-boxes and transactivatesFER1expression. We show thatERF95expression in maturing seed is dependent on EIN3, the master transcriptional regulator of ethylene signaling. While lack of EIN3 reduces seed Fe content, overexpression ofERF95rescues Fe accumulation in the seed ofein3loss-of-function mutant. Finally, we show that ethylene production increases during seed maturation. We conclude that ethylene promotes seed Fe accumulation during seed maturation via an EIN3-ERF95-FER1-dependent signaling pathway.
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