TIP2-UDT1-OsUPEX1/2 module regulates tapetum development and function in rice

© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.

Détails bibliographiques
Publié dans:The New phytologist. - 1979. - (2025) vom: 27. Feb.
Auteur principal: Wang, Ruifeng (Auteur)
Autres auteurs: Sun, Yaqian, Liu, Wanlin, Chen, Xiaofei, Xu, Jie, Yuan, Zheng, Liang, Wanqi, Zhang, Dabing
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:The New phytologist
Sujets:Journal Article anther bHLH transcription factor callose galactosyltransferase rice tapetum
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520 |a The tapetum in the anther wall is essential for plant fertility, secreting many components essential for pollen development. Development of the tapetum is controlled by multiple transcription factors and signaling pathways. UDT1, TIP2, TDR, and EAT1 constitute a sequential regulatory cascade crucial for tapetal differentiation in rice, but UDT1- and TIP2-dependent regulatory networks, particularly in early anther development, remain largely unknown. Functional analysis of knockout mutants and spatial-temporal expression analysis demonstrated overlapping expression of TIP2 and UDT1 in the middle layer and tapetum and that the tip2 mutation was epistatic to udt1. Moreover, TIP2 and UDT1 were shown to heterodimerize to activate the expression of downstream genes essential for early anther development. We identified two genes activated by TIP2-UDT1, OsUPEX1 and OsUPEX2, predicted to encode galactosyltransferases, that were preferentially expressed in the tapetum. Analysis of their single mutants demonstrated their functional redundancy, while the double knockout mutant revealed their critical roles in tapetum development and function, likely in enabling tapetal secretion. Overall, this study provides insights into the regulation of rice anther development by TIP2 and UDT1 and identifies downstream targets OsUPEX1 and OsUPEX2 essential for tapetum function and rice male fertility 
650 4 |a Journal Article 
650 4 |a anther 
650 4 |a bHLH transcription factor 
650 4 |a callose 
650 4 |a galactosyltransferase 
650 4 |a rice 
650 4 |a tapetum 
700 1 |a Sun, Yaqian  |e verfasserin  |4 aut 
700 1 |a Liu, Wanlin  |e verfasserin  |4 aut 
700 1 |a Chen, Xiaofei  |e verfasserin  |4 aut 
700 1 |a Xu, Jie  |e verfasserin  |4 aut 
700 1 |a Yuan, Zheng  |e verfasserin  |4 aut 
700 1 |a Liang, Wanqi  |e verfasserin  |4 aut 
700 1 |a Zhang, Dabing  |e verfasserin  |4 aut 
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