Banana MaBZR1/2 associate with MaMPK14 to modulate cell wall modifying genes during fruit ripening
文献类型: 外文期刊
作者: Shan, Wei 1 ; Guo, Yu-Fan 1 ; Wei, Wei 1 ; Chen, Jian-Ye 1 ; Lu, Wang-Jin 1 ; Yuan, De-Bao 3 ; Su, Xin-Guo 2 ; Kuang, Jia 1 ;
作者机构: 1.South China Agr Univ, Guangdong Prov Key Lab Postharvest Sci Fruits & V, Engn Res Ctr Southern Hort Prod Preservat, Minist Educ,Coll Hort, Guangzhou 510642, Peoples R China
2.Guangdong Food & Drug Vocat Coll, Longdongbei Rd 321, Guangzhou 510520, Peoples R China
3.Chinese Acad Trop Agr Sci, Hainan Key Lab Banana Genet Improvement, Haikou Expt Stn, Haikou 570102, Hainan, Peoples R China
关键词: Banana fruit; BZR; Cell wall modification; Protein-protein interaction; Transcriptional regulation
期刊名称:PLANT CELL REPORTS ( 影响因子:4.57; 五年影响因子:4.463 )
ISSN: 0721-7714
年卷期: 2020 年 39 卷 1 期
页码:
收录情况: SCI
摘要: Key message Banana MaBZR1/2 interact with MaMPK14 to enhance the transcriptional inhibition of cell wall modifying genes including MaEXP2, MaPL2 and MaXET5. Fruit ripening and softening, the major attributes to perishability in fleshy fruits, are modulated by various plant hormones and gene expression. Banana MaBZR1/2, the central transcription factors of brassinosteroid (BR) signaling, mediate fruit ripening through regulation of ethylene biosynthesis, but their possible roles in fruit softening as well as the underlying mechanisms remain to be determined. In this work, we found that MaBZR1/2 directly bound to and repressed the promoters of several cell wall modifying genes such as MaEXP2, MaPL2 and MaXET5, whose transcripts were elevated concomitant with fruit ripening. Moreover, yeast two-hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays indicated that MaBZR1/2 physically interacted with a mitogen-activated protein kinase MaMPK14, and this interaction strengthened the MaBZR1/2-mediated transcriptional inhibitory abilities. Collectively, our study provides insight into the mechanism of MaBZR1/2 contributing to fruit ripening and softening, which may have potential for banana molecular improvement.
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