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bHLH010/089 Transcription Factors Control Pollen Wall Development via Specific Transcriptional and Metabolic Networks in Arabidopsis thaliana

文献类型： 外文期刊

作者： Lai, Zesen 1 ; Wang, Jianzheng 2 ; Peng, Shi-Qing 1 ; Chang, Fang 2 ;

作者机构： 1.Hainan Univ, Sch Life Sci, Haikou 570228, Hainan, Peoples R China

2.Fudan Univ, Sch Life Sci, Inst Plant Biol, Minist Educ,Key Lab Biodivers Sci & Ecol Engn,Sta, Shanghai 200438, Peoples R China

3.Fudan Univ, Inst Biodivers Sci, Inst Plant Biol, Sch Life Sci, Shanghai 200438, Peoples R China

4.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Hainan, Peoples R China

关键词： anther; pollen wall development; bHLH010; CSLB03; Arabidopsis thaliana

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 19 期

页码：

收录情况： SCI

摘要： The pollen wall is a specialized extracellular cell wall that protects male gametophytes from various environmental stresses and facilitates pollination. Here, we reported that bHLH010 and bHLH089 together are required for the development of the pollen wall by regulating their specific downstream transcriptional and metabolic networks. Both the exine and intine structures of bhlh010 bhlh089 pollen grains were severely defective. Further untargeted metabolomic and transcriptomic analyses revealed that the accumulation of pollen wall morphogenesis-related metabolites, including polysaccharides, glyceryl derivatives, and flavonols, were significantly changed, and the expression of such metabolic enzyme-encoding genes and transporter-encoding genes related to pollen wall morphogenesis was downregulated in bhlh010 bhlh089 mutants. Among these downstream target genes, CSLB03 is a novel target with no biological function being reported yet. We found that bHLH010 interacted with the two E-box sequences at the promoter of CSLB03 and directly activated the expression of CSLB03. The cslb03 mutant alleles showed bhlh010 bhlh089-like pollen developmental defects, with most of the pollen grains exhibiting defective pollen wall structures.

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