文献类型： 外文期刊

作者： Chen, Huiqiong ¹ ; Zhang, Shuqing ¹ ; Li, Ruiqi ¹ ; Peng, Guoqing ¹ ; Chen, Weipan ¹ ; Rautengarten, Carsten ³ ; Liu, Minglong ¹ ; Zhu, Liya ¹ ; Xiao, Yueping ¹ ; Song, Fengshun ⁴ ; Ni, Jinlong ¹ ; Huang, Jilei ¹ ; Wu, Aimin ⁵ ; Liu, Zhenlan ¹ ; Zhuang, Chuxiong ¹ ; Heazlewood, Joshua L. ³ ; Xie, Yongyao ¹ ; Chu, Zhizhan ¹ ; Zhou, Hai ¹ ;

作者机构： 1.South China Agr Univ, Guangdong Lab Lingnan Modern Agr, State Key Lab Conservat & Utilizat Subtrop Agrobio, Coll Life Sci, Guangzhou 510642, Peoples R China

2.Guangdong Acad Agr Sci, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree R, Inst Fruit Tree Res,Minist Agr & Rural Affairs, Guangzhou 510640, Peoples R China

3.Univ Melbourne, Sch Biosci, Parkville, Vic 3010, Australia

4.Anhui Acad Agr Sci, Rice Res Inst, Key Lab Rice Genet Breeding Anhui Prov, Hefei 230001, Peoples R China

5.South China Agr Univ, Coll Forestry & Landscape Architecture, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangzhou 510642, Peoples R China

期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.9 ）

ISSN： 1040-4651

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Uridine diphosphate (UDP)-sugars are important metabolites involved in the biosynthesis of polysaccharides and may be important signaling molecules. UDP-glucose 4-epimerase (UGE) catalyzes the interconversion between UDP-Glc and UDP-Gal, whose biological function in rice (Oryza sativa) fertility is poorly understood. Here, we identify and characterize the botryoid pollen 1 (bp1) mutant and show that BP1 encodes a UGE that regulates UDP-sugar homeostasis, thereby controlling the development of rice anthers. The loss of BP1 function led to massive accumulation of UDP-Glc and imbalance of other UDP-sugars. We determined that the higher levels of UDP-Glc and its derivatives in bp1 may induce the expression of NADPH oxidase genes, resulting in a premature accumulation of reactive oxygen species (ROS), thereby advancing programmed cell death (PCD) of anther walls but delaying the end of tapetal degradation. The accumulation of UDP-Glc as metabolites resulted in an abnormal degradation of callose, producing an adhesive microspore. Furthermore, the UDP-sugar metabolism pathway is not only involved in the formation of intine but also in the formation of the initial framework for extine. Our results reveal how UDP-sugars regulate anther development and provide new clues for cellular ROS accumulation and PCD triggered by UDP-Glc as a signaling molecule. UDP-Glc and its derivatives induce the expression of NADPH oxidase genes, inducing ROS-triggered PCD as signaling molecules, but also regulate pollen wall development as metabolites.