CTB6 Confers Cold Tolerance at the Booting Stage by Maintaining Tapetum Development in Rice
文献类型： 外文期刊
作者： Gao, Shilei 1 ; Li, Jin 1 ; Zeng, Yawen 2 ; Li, Huahui 3 ; Guo, Zhenhua 4 ; Guo, Haifeng 1 ; Zhang, Meng 1 ; Gu, Yunsong 1 ; Su, Runbin 1 ; Ye, Wei 1 ; Zou, Andong 1 ; Sun, Xingming 1 ; Zhang, Zhanying 1 ; Zhang, Hongliang 1 ; Guo, Yongmei 3 ; Ma, Wendong 4 ; Yuan, Pingrong 3 ; Li, Zichao 1 ; Li, Jinjie 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Frontiers Sci Ctr Mol Design Breeding, Beijing Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China
2.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Kunming 650205, Peoples R China
3.Yunnan Acad Agr Sci, Inst Food Crop Res, Kunming 650205, Peoples R China
4.Heilongjiang Acad Agr Sci, Rice Res Inst, Jiamusi 154026, Peoples R China
关键词： cold tolerance; CTB6; pollen fertility; tapetum development; the booting stage
期刊名称：ADVANCED SCIENCE （ 影响因子：14.1； 五年影响因子：15.6 ）
ISSN：
年卷期： 2025 年 12 卷 10 期
页码：
收录情况： SCI
摘要： Rice is highly sensitive to cold stress, particularly at the booting stage, which significantly threatens rice production. In this study, we cloned a gene, CTB6, encoding a lipid transfer protein involved in cold tolerance at the booting stage in rice, based on our previous fine-mapped quantitative trait locus (QTL) qCTB10-2. CTB6 is mainly expressed in the tapetum and young microspores of the anther. CTB6 interacts with catalases (CATs) to maintain their stability, thereby scavenging reactive oxygen species (ROS) accumulation in anthers and facilitating tapetum development under cold stress conditions. Additionally, CTB6 has lipid-binding ability and affects the lipid content in anthers to regulate cold tolerance at the booting stage. Haplotype analysis and promoter activity assay revealed a specific single nucleotide polymorphism (SNP)-489 variation in the promoter of CTB6, which enhances its expression and results in improved cold tolerance in Hap1-K varieties. The CTB6 near-isogenic line (NIL) exhibited enhanced cold tolerance at the booting stage, with no significant effects on other agronomic traits. Our findings uncover a natural variation of CTB6 for cold tolerance at the booting stage and provide new genetic resources for cold tolerance breeding in rice.
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