Natural variation in CTB4a enhances rice adaptation to cold habitats

Zhanying Zhang, Jinjie Li, Yinghua Pan, Jilong Li, Lei Zhou, Hongli Shi, Yawen Zeng, Haifeng Guo, Shuming Yang, Weiwei Zheng, Jianping Yu, Xingming Sun, Gangling Li, Yanglin Ding, Liang Ma, Shiquan Shen, Luyuan Dai, Hongliang Zhang, Shuhua Yang, Yan Guo and Zichao Li ()
Additional contact information
Zhanying Zhang: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Jinjie Li: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Yinghua Pan: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Jilong Li: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Lei Zhou: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Hongli Shi: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Yawen Zeng: Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences
Haifeng Guo: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Shuming Yang: Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences
Weiwei Zheng: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Jianping Yu: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Xingming Sun: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Gangling Li: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Yanglin Ding: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University
Liang Ma: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University
Shiquan Shen: Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences
Luyuan Dai: Biotechnology and Genetic Resources Institute, Yunnan Academy of Agricultural Sciences
Hongliang Zhang: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Shuhua Yang: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University
Yan Guo: State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University
Zichao Li: Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University

Nature Communications, 2017, vol. 8, issue 1, 1-13

Abstract: Abstract Low temperature is a major factor limiting rice productivity and geographical distribution. Improved cold tolerance and expanded cultivation to high-altitude or high-latitude regions would help meet growing rice demand. Here we explored a QTL for cold tolerance and cloned the gene, CTB4a (cold tolerance at booting stage), encoding a conserved leucine-rich repeat receptor-like kinase. We show that different CTB4a alleles confer distinct levels of cold tolerance and selection for variation in the CTB4a promoter region has occurred on the basis of environmental temperature. The newly generated cold-tolerant haplotype Tej-Hap-KMXBG was retained by artificial selection during temperate japonica evolution in cold habitats for low-temperature acclimation. Moreover, CTB4a interacts with AtpB, a beta subunit of ATP synthase. Upregulation of CTB4a correlates with increased ATP synthase activity, ATP content, enhanced seed setting and improved yield under cold stress conditions. These findings suggest strategies to improve cold tolerance in crop plants.

Date: 2017
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DOI: 10.1038/ncomms14788

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