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Get Free AccessIncreasing soil salinization seriously impairs plant growth and development, resulting in crop loss. The Salt-Overly-Sensitive (SOS) pathway is indispensable to the mitigation of Na + toxicity in plants under high salinity. However, whether natural variations of SOS2 contribute to salt tolerance has not been reported. Here a natural variation in the SlSOS2 promoter region was identified to be associated with root Na+/K+ ratio and the loss of salt resistance during tomato domestication. This natural variation contains an ABI4-binding cis-element and plays an important role in the repression of SlSOS2 expression. Genetic evidence revealed that SlSOS2 mutations increase root Na+/K+ ratio under salt stress conditions and thus attenuate salt resistance in tomato. Together, our findings uncovered a critical but previously unknown natural variation of SOS2 in salt resistance, which provides valuable natural resources for genetic breeding for salt resistance in cultivated tomatoes and other crops.
Yechun Hong, Xi‐Jin Guan, Xu Wang, Dali Kong, Shuojun Yu, Zhiqiang Wang, Yongdong Yu, Zhen‐Fei Chao, Xue Liu, Sanwen Huang, Jian Kang Zhu, Guangtao Zhu, Zhen Wang (2022). Natural variation in <i>SlSOS2</i> promoter hinders salt resistance during tomato domestication. , 10(1), DOI: https://doi.org/10.1093/hr/uhac244.
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Type
Article
Year
2022
Authors
13
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1093/hr/uhac244
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