Article
Plant Sciences
Li Ge, Hongming Guo, Xiu Li, Ming Tang, Chiming Guo, Han Bao, Linjuan Huang, Yin Yi, Yuchao Cui, Liang Chen
Summary: The OsSIDP301 protein plays a negative regulatory role in salt stress and grain size in rice. Inhibiting its expression represents a promising strategy for improving salt stress tolerance and yield.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Mingming Wu, Maohong Cai, Rongrong Zhai, Jing Ye, Guofu Zhu, Faming Yu, Shenghai Ye, Xiaoming Zhang
Summary: Rice kernel quality is crucial for commercial value, but the molecular mechanisms governing grain chalkiness are still unclear. In this study, a hereditary mutant called white belly grain 1 (wbg1) was identified, which had lower grain filling rate and oval or round loosely arranged starch granules in the chalky part. Map-based cloning revealed that wbg1 was an allelic mutant of FLO10, affecting ATP production in wbg1 grains. Haplotype analysis showed that WBG1 was associated with grain width between indica and japonica rice varieties. These findings enhance our understanding of the molecular mechanisms regulating rice grain quality and support molecular breeding for improved rice quality.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
You -Huang Xiang, Jia-Jun Yu, Ben Liao, Jun -Xiang Shan, Wang-Wei Ye, Nai-Qian Dong, Tao Guo, Yi Kan, Hai Zhang, Yi-Bing Yang, Ya-Chao Li, Huai-Yu Zhao, Hong-Xiao Yu, Zi-Qi Lu, Hong-Xuan Lin
Summary: In this study, a gene locus named STH1 was identified in African rice that is associated with salt tolerance. STH1 regulates fatty acid metabolism and protein degradation, thereby improving rice's salt tolerance and yield. Moreover, STH1 also interacts with other genes to coordinate flowering time and salt stress adaptation. These findings provide new insights into the mechanisms of salt tolerance and plant development, and offer potential strategies for addressing soil salinization challenges.
Article
Multidisciplinary Sciences
Shiqing Dong, Xianxin Dong, Xiaokang Han, Fan Zhang, Yu Zhu, Xiaoyun Xin, Ying Wang, Yuanyi Hu, Dingyang Yuan, Jianping Wang, Zhou Huang, Fuan Niu, Zejun Hu, Peiwen Yan, Liming Cao, Haohua He, Junru Fu, Yeyun Xin, Yanning Tan, Bigang Mao, Bingran Zhao, Jinshui Yang, Longping Yuan, Xiaojin Luo
Summary: OsPDCD5 gene regulates plant architecture and grain yield in rice. Knockout of OsPDCD5 enhances yield, plant height, and improves grain shape, affecting auxin, gibberellin, and cytokinin pathways. OsPDCD5 interacts with OsAGAP to positively regulate plant architecture and grain yield in rice, making it a promising candidate gene for breeding high-yielding and high-quality super rice varieties.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Plant Sciences
Erwang Chen, Qingqing Hou, Kun Liu, Zhoulin Gu, Bingxin Dai, Ahong Wang, Qi Feng, Yan Zhao, Congcong Zhou, Jingjie Zhu, Yingying Shangguan, Yongchun Wang, Danfeng Lv, Danlin Fan, Tao Huang, Zixuan Wang, Xuehui Huang, Bin Han
Summary: In this study, a QTL for grain size and grain quality called GS10 was characterized by map-based cloning from wild rice. GS10 encodes a protein with 6 tandem armadillo repeats and is involved in regulating grain shape and brassinosteroid signaling. Combining gs10 with another grain size gene substantially improves grain shape and appearance quality, and natural variation analysis shows that gs10 is a rare allele in the rice population. These findings contribute to our understanding of the mechanism underlying grain shape and provide a beneficial allele for rice breeding.
Article
Biochemistry & Molecular Biology
Jiyue Qiao, Hongzhen Jiang, Yuqing Lin, Lianguang Shang, Mei Wang, Dongming Li, Xiangdong Fu, Markus Geisler, Yanhua Qi, Zhenyu Gao, Qian Qian
Summary: The study identified a quantitative trait locus qGL5 for grain length (GL) and grain weight (GW) in rice and fine mapped it to the candidate gene OsAUX3, revealing that OsARF6 is an upstream transcription factor regulating the expression of OsAUX3. Through a series of experiments, it was found that miR167a positively regulates GL and GW by directing OsARF6 mRNA silencing.
Article
Biotechnology & Applied Microbiology
Dunpin Xiong, Ruci Wang, Yueming Wang, Yi Li, Ge Sun, Shanguo Yao
Summary: This study identifies the SLG2 gene that specifically regulates grain width in rice by affecting cell expansion in the spikelet hulls. The SLG2 gene acts as a transcription activator of the WOX11 protein, which directly binds to the promoter of the downstream cell expansion gene OsEXPB7. Knockout of WOX11 results in a slender grain phenotype similar to the slg2 mutant, and combining SLG2 with the grain width regulator GW8 can produce finer grains with different widths.
PLANT BIOTECHNOLOGY JOURNAL
(2023)
Article
Agronomy
Chang-Lin Zheng, Shi-Lin Wang, Ye-Yang Fan, Ting-Xu Huang, Jie-Yun Zhuang, Yu-Jun Zhu, Hui Zhang
Summary: This study identified and validated quantitative trait loci (QTLs) controlling grain size, weight and ratio in a specific region of chromosome 11 in rice. The QTL qGS11 showed potential for application in rice breeding.
Article
Plant Sciences
Jiayi Wang, Chuanyu Zhang, Hua Li, Yuejun Xu, Bo Zhang, Fuyu Zheng, Beiping Zhao, Haiwen Zhang, Hui Zhao, Baohai Liu, Minggang Xiao, Zhijin Zhang
Summary: This study revealed the negative regulatory role of OsJAB1 in rice salt stress tolerance. Overexpression of OsJAB1 impaired salt stress tolerance, while inhibition of OsJAB1 enhanced salt stress tolerance. OsJAB1 overexpression increased ascorbate (Asc) content, while inhibition decreased Asc content. OsJAB1 overexpression inhibited ROS accumulation at the early stage of salt treatment, while promoting it at the late stage. Moreover, OsJAB1 overexpression decreased the expression of ROS-scavenging genes, while inhibition enhanced their expression.
Article
Agronomy
Lu Junhua, Yang Xuemei, Chen Jinfeng, Li Tingting, Hu Zijin, Xie Ying, Li Jinlu, Zhao Jiqun, Pu Mei, Feng Hui, Fan Jing, Huang Yanyan, Zhang Jiwei, Wang Wenming, Li Yan
Summary: The study revealed that Osa-miR439 acts as a negative regulator in rice immunity against blast fungus, with higher accumulation in susceptible rice accessions. Transgenic rice lines overexpressing Osa-miR439a exhibited higher susceptibility, while lines expressing a target mimic of Osa-miR439 displayed increased resistance. This suggests that Osa-miR439a may regulate rice blast resistance via certain target genes.
Article
Plant Sciences
Zhen Li, Junrong Liu, Xingyu Wang, Jing Wang, Junhua Ye, Siliang Xu, Yuanyuan Zhang, Dongxiu Hu, Mengchen Zhang, Qun Xu, Shan Wang, Yaolong Yang, Xinghua Wei, Yue Feng, Shu Wang
Summary: In this study, a rice mutant with a larger flag leaf angle was identified. The gene LOC_Os05g40384 was found to be responsible for regulating grain size and flag leaf angle. Functional analysis showed that LG5 can rescue the phenotype in different rice backgrounds, indicating its potential as a target for rice breeding improvement.
Article
Plant Sciences
Ruirui Jiang, Shichen Zhou, Xiaowen Da, Tao Chen, Jiming Xu, Peng Yan, Xiaorong Mo
Summary: In this study, a lesion mimic mutant (LMM) in rice, rust spots rice (rsr1), was identified and the mutated gene OsUBP2 was characterized. The mutation in OsUBP2 led to ROS accumulation, chloroplast structural defects, and programmed cell death, while weakening rice resistance to pathogens.
Article
Agronomy
Mingxin Guo, Jiajia Liu, Linlin Hou, Suna Zhao, Nana Zhang, Lili Lu, Xusheng Zhao
Summary: In this study, researchers identified the OsNDB2 gene as a negative regulator of grain size and weight in rice. Overexpression of OsNDB2 resulted in smaller grains, while knockout of OsNDB2 increased grain size. Cellular observations revealed that changes in grain size were attributed to alterations in cell expansion. This study provides insights into OsNDB2 function and suggests a potential breeding strategy for increasing rice grain size and weight.
Article
Plant Sciences
Kun Liu, Xin Wang, Hengchen Liu, Jiarui Wu, Feng Liang, Shaobo Li, Jianjun Zhang, Xinxiang Peng
Summary: The OsAT1 gene plays an important role in rice yield and starch accumulation. Knocking down the OsAT1 gene can increase rice yield and weight, while reducing copper accumulation. These findings provide valuable insights for rice breeding programs.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Plant Sciences
Changjiang Cui, Zhifeng Ma, Hui Wan, Jianbo Gao, Baoliang Zhou
Summary: The study identified and classified 40 AlkB genes in cotton and Arabidopsis, showing highly conserved protein motifs and exon/intron structures. The AlkB gene family in cotton has expanded through duplication events, and their dynamic expression patterns respond diversely to abiotic stresses. GhALKBH10 gene negatively regulates salt tolerance in plants, providing new insights into cotton AlkB family and its role in salt stress conditions.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)