首页|Maize ZmSRO1e promotes mesocotyl elongation and deep sowing tolerance by inhibiting the activity of ZmbZIP61

Maize ZmSRO1e promotes mesocotyl elongation and deep sowing tolerance by inhibiting the activity of ZmbZIP61

扫码查看
原文链接
  • 万方数据
  • 维普
Deep sowing is a traditional method for drought resistance in maize production,and mesocotyl elongation is strongly associated with the ability of maize to germinate from deep soil.However,little is known about the functional genes and mecha-nisms regulating maize mesocotyl elongation.In the present study,we identified a plant-specific SIMILAR TO RCD-ONE(SRO)protein family member,ZmSRO1e,involved in maize mesocotyl elongation.The expression of ZmSRO1e is strongly inhibited upon transfer from dark to white light.The loss-of-function zmsro1e mutant ex-hibited a dramatically shorter mesocotyl than the wild-type in both constant light and darkness,while overexpression of ZmSRO1e significantly promoted mesocotyl elongation,indicating that ZmSRO1e positively regulates mesocotyl elonga-tion.We showed that ZmSRO1e physically inter-acted with ZmbZIP61,an ortholog of Arabidopsis ELONGATED HYPOCOTYL 5(HY5)and showed a function similar to that of HY5 in regulating pho-tomorphogenesis.We found that ZmSRO1e re-pressed the transcriptional activity of ZmbZIP61 toward target genes involved in the regulation of cell expansion,such as ZmEXPB4 and ZmEXPB6,by interfering with the binding of ZmbZIP61 to the promoters of target genes.Our results provide a new understanding of the mechanism by which SRO regulates photomorphogenesis and highlight its potential application in deep sowing-resistant breeding.

deep sowingHY5maizeMesocotylSRO

Lumin Qin、Fangfang Kong、Lin Wei、Minghan Cui、Jianhang Li、Chen Zhu、Yue Liu、Guangmin Xia、Shuwei Liu

展开 >

Key Laboratory of Plant Development and Environmental Adaptation Biology,Ministry of Education,School of Life Science,Shandong University,Qingdao 266237,China

Crop Research Institute,Anhui Academy of Agricultural Sciences,Hefei,Anhui Province 230031,China

2024

10.1111/jipb.13714

植物学报(英文版)
中国植物学会

植物学报(英文版)

CSTPCD
影响因子：0.921
ISSN：1672-9072
年,卷(期)：2024.66(8)
  • 1