Panicle Apical Abortion 3 Controls Panicle Development and Seed Size in Rice

Rice

Yan Wang¹  Ziyi Wang¹  Hui Zhuang¹  Fayu Yang¹  Qinglan Cheng¹  Lu Lu¹  Rui Chen¹  Yunfeng Li¹  Mao Xiong¹  Honghui Zhu¹  Mingjiang Huang¹  Zhongcheng Li¹  Jun Tang¹ 

[1] Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, 400715, Chongqing, China;

关键词: Rice;    Panicle apical abortion;    Programmed cell death;    H-ATPase;   

DOI  :  10.1186/s12284-021-00509-5

来源: Springer

【 摘 要 】

BackgroundIn rice, panicle apical abortion is a common phenomenon that usually results in a decreased number of branches and grains per panicle, and consequently a reduced grain yield. A better understanding of the molecular mechanism of panicle abortion is thus critical for maintaining and increasing rice production.ResultsWe reported a new rice mutant panicle apical abortion 3 (paa3), which exhibited severe abortion of spikelet development on the upper part of the branches as well as decreased grain size over the whole panicle. Using mapping-based clone, the PAA3 was characterized as the LOC_ Os04g56160 gene, encoding an H+-ATPase. The PAA3 was expressed highly in the stem and panicle, and its protein was localized in the plasma membrane. Our data further showed that PAA3 played an important role in maintaining normal panicle development by participating in the removal of reactive oxygen species (ROS) in rice.ConclusionsOur studies suggested that PAA3 might function to remove ROS, the accumulation of which leads to programmed cell death, and ultimately panicle apical abortion and decreased seed size in the paa3 panicle.

【 授权许可】

CC BY