首页|A natural variation in SlSCaBP8 promoter contributes to the loss of saline-alkaline tolerance during tomato improvement

A natural variation in SlSCaBP8 promoter contributes to the loss of saline-alkaline tolerance during tomato improvement

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Saline-alkaline stress is a worldwide problem that threatens the growth and yield of crops.However,how crops adapt to saline-alkaline stress remains less studied.Here we show that saline-alkaline tolerance was compromised during tomato domestication and improvement,and a natural variation in the promoter of SlSCaBP8,an EF-hand Ca2+binding protein,contributed to the loss of saline-alkaline tolerance during tomato improvement.The biochemical and genetic data showed that SlSCaBP8 is a positive regulator of saline-alkaline tolerance in tomato.The introgression line Pi-75,derived from a cross between wild Solanum pimpinellifolium LA1589 and cultivar E6203,containing the SlSCaBP8LA1589 locus,showed stronger saline-alkaline tolerance than E6203.Pi-75 and LA1589 also showed enhanced saline-alkaline-induced SlSCaBP8 expression than that of E6203.By sequence analysis,a natural variation was found in the promoter of SlSCaBP8 and the accessions with the wild haplotype showed enhanced saline-alkaline tolerance compared with the cultivar haplotype.Our studies clarify the mechanism of saline-alkaline tolerance conferred by SlSCaBP8 and provide an important natural variation in the promoter of SlSCaBP8 for tomato breeding.

Jian Liu、Chi Zhang、Heyao Sun、Yinqiang Zang、Xianwen Meng、Huawei Zhai、Qian Chen、Chuanyou Li

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College of Agronomy,Shandong Agricultural University,Tai'an,Shandong 271018,China

College of Horticulture Science and Engineering,Shandong Agricultural University,Tai'an,Shandong 271018,China

Beijing Key Laboratory for Agricultural Applications and New Techniques,Plant Science and Technology College,Beijing University of Agriculture,Beijing,102206,China

College of Life Science,Shandong Agricultural University,Tai'an,Shandong 271018,China

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National Natural Science Foundation of China-Shandong Joint Fund国家自然科学基金国家自然科学基金Agricultural Seed Project of Shandong ProvinceAgricultural Seed Project of Shandong ProvinceTaishan Scholar Program from the Shandong Provincial GovernmentTaishan Scholar Program from the Shandong Provincial Government

U22A2045932272701320003642020LZGC0052021LZGC017tsqn20161021tsxk20150901

2024

10.1093/hr/uhae055

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(4)
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