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Releasing a sugar brake generates sweeter tomato without yield penalty

文献类型： 外文期刊

作者： Zhang, Jinzhe 1 ; Lyu, Hongjun 2 ; Chen, Jie 2 ; Cao, Xue 4 ; Du, Ran 2 ; Ma, Liang 5 ; Wang, Nan 2 ; Zhu, Zhiguo 6 ; Rao, Jianglei 2 ; Wang, Jie 2 ; Zhong, Kui 7 ; Lyu, Yaqing 2 ; Wang, Yanling 2 ; Lin, Tao 8 ; Zhou, Yao 9 ; Zhou, Yongfeng 2 ; Zhu, Guangtao 6 ; Fei, Zhangjun 10 ; Klee, Harry 2 ; Huang, Sanwen 2 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, State Key Lab Vegetable Biobreeding, Beijing, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Natl Key Lab Trop Crop Breeding,Guangdong Lab Ling, Shenzhen, Peoples R China

3.Minist Agr & Rural Affairs, Inst Vegetables, Shandong Key Lab Bulk Open Field Vegetable Breedin, Key Lab Huang Huai Protected Hort Engn,Shandong Ac, Jinan, Peoples R China

4.China Acad Chinese Med Sci, Inst Chinese Mat Med, State Key Lab Qual Ensurance & Sustainable Use Dao, Beijing, Peoples R China

5.China Agr Univ, Coll Biol Sci, State Key Lab Plant Environm Resilience SKLPER, Beijing, Peoples R China

6.Yunnan Normal Univ, Sch Life Sci, Southwest United Grad Sch, Yunnan Key Lab Potato Biol, Kunming, Peoples R China

7.China Natl Inst Standardizat, Agr & Food Standardizat Inst, Beijing, Peoples R China

8.China Agr Univ, Coll Hort, Beijing, Peoples R China

9.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing, Peoples R China

10.Cornell Univ, Boyce Thompson Inst, Ithaca, NY USA

11.Chinese Acad Trop Agr Sci, Natl Key Lab Trop Crop Breeding, Haikou, Peoples R China

期刊名称：NATURE （ 影响因子：48.5； 五年影响因子：55.0 ）

ISSN： 0028-0836

年卷期： 2024 年 635 卷 8039 期

页码：

收录情况： SCI

摘要： In tomato, sugar content is highly correlated with consumer preferences, with most consumers preferring sweeter fruit1-4. However, the sugar content of commercial varieties is generally low, as it is inversely correlated with fruit size, and growers prioritize yield over flavour quality5-7. Here we identified two genes, tomato (Solanum lycopersicum) calcium-dependent protein kinase 27 (SlCDPK27; also known as SlCPK27) and its paralogue SlCDPK26, that control fruit sugar content. They act as sugar brakes by phosphorylating a sucrose synthase, which promotes degradation of the sucrose synthase. Gene-edited SlCDPK27 and SlCDPK26 knockouts increased glucose and fructose contents by up to 30%, enhancing perceived sweetness without fruit weight or yield penalty. Although there are fewer, lighter seeds in the mutants, they exhibit normal germination. Together, these findings provide insight into the regulatory mechanisms controlling fruit sugar accumulation in tomato and offer opportunities to increase sugar content in large-fruited cultivars without sacrificing size and yield. A study identifies two genes that act as brakes controlling the sugar content of tomatoes and demonstrates their manipulation to generate sweeter tomatoes without affecting the fruit size and yield.

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