Please wait a minute...
J Integr Plant Biol, 2016, 58 (10): 836-847, Research Article
OsGRF4 controls grain shape, panicle length and seed shattering in rice
Pingyong Sun1,2,3,†, Wuhan Zhang2,3,4,†, Yihua Wang5, Qiang He2,3, Fu Shu2,3, Hai Liu2, Jie Wang2, Jianmin Wang2, Longping Yuan2,3 and Huafeng Deng2,3*
1College of Agronomy, Hunan Agricultural University, Changsha, China
2State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Hunan Academy of Agricultural Sciences, Changsha, China
3Collaborative Innovation Center of Grain and Oil Crops in South China, Changsha, China
4China National Japonica Rice Research and Development Center, Tianjin, China
5State Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
These authors contributed equally to this work.
*Correspondence: E-mail: dhf@hhrrc.ac.cn.
doi: 10.1111/jipb.12473
Abstract

Traits such as grain shape, panicle length and seed shattering, play important roles in grain yield and harvest. In this study, the cloning and functional analysis of PANICLE TRAITS 2 (PT2), a novel gene from the Indica rice Chuandali (CDL), is reported. PT2 is synonymous with Growth-Regulating Factor 4 (OsGRF4), which encodes a growth-regulating factor that positively regulates grain shape and panicle length and negatively regulates seed shattering. Higher expression of OsGRF4 is correlated with larger grain, longer panicle and lower seed shattering. A unique OsGRF4 mutation, which occurs at the OsmiRNA396 target site of OsGRF4, seems to be associated with high levels of OsGRF4 expression, and results in phenotypic difference. Further research showed that OsGRF4 regulated two cytokinin dehydrogenase precursor genes (CKX5 and CKX1) resulting in increased cytokinin levels, which might affect the panicle traits. High storage capacity and moderate seed shattering of OsGRF4 may be useful in high-yield breeding and mechanized harvesting of rice. Our findings provide additional insight into the molecular basis of panicle growth.

--------------------------------------------------------------------------------------------------------------------
Received: 21 October 2015      Accepted:    Online on:
This Article
   Full Text  
   Full Text (PDF) 
   Supporting information
Services
   E-mail Link to this Article
   Export Citation for this Article
Citing Articles
   Cited By
Google Scholar
   Articles by Pingyong Sun
   Articles by Wuhan Zhang
   Articles by Yihua Wang
   Articles by Qiang He
   Articles by Fu Shu
   Articles by Hai Liu
   Articles by Jie Wang
   Articles by Jianmin Wang
   Articles by Longping Yuan
   Articles by Huafeng Deng
PubMed
   Articles by Pingyong Sun
   Articles by Wuhan Zhang
   Articles by Yihua Wang
   Articles by Qiang He
   Articles by Fu Shu
   Articles by Hai Liu
   Articles by Jie Wang
   Articles by Jianmin Wang
   Articles by Longping Yuan
   Articles by Huafeng Deng
Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2020 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
网站备案号:京ICP备16067583号-22