Natural variation in CTB4a enhances rice adaptation to cold habitats

نویسندگان

  • 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
  • Zichao Li
چکیده

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.

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عنوان ژورنال:

دوره 8  شماره 

صفحات  -

تاریخ انتشار 2017