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FIS1 encodes a GA2-oxidase that regulates fruit firmness in tomato

文献类型： 外文期刊

作者： Li, Ren 1 ; Sun, Shuai 1 ; Wang, Haijing 1 ; Wang, Ketao 3 ; Yu, Hong 4 ; Zhou, Zhen 1 ; Xin, Peiyong 4 ; Chu, Jinfang 4 ; Z 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Minist Agr, Key Lab Biol & Genet Improvement Hort Crops, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Sino Dutch Joint Lab Hort Genom, Beijing 100081, Peoples R China

3.Zhejiang Agr & Forestry Univ, State Key Lab Subtrop Forest Cultivat, Hangzhou 311300, Peoples R China

4.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China

5.Chinese Acad Sci, Inst Genet & Dev Biol, Natl Ctr Plant Gene Res Beijing, Beijing 100101, Peoples R China

6.Jiangsu Acad Agr Sci, Vegetable Res Inst, Nanjing 210014, Peoples R China

7.Univ Connecticut, Dept Plant Sci & Landscape Architecture, Storrs, CT 06269 USA

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2020 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Fruit firmness is a target trait in tomato breeding because it facilitates transportation and storage. However, it is also a complex trait and uncovering the molecular genetic mechanisms controlling fruit firmness has proven challenging. Here, we report the map-based cloning and functional characterization of qFIRM SKIN 1 (qFIS1), a major quantitative trait locus that partially determines the difference in compression resistance between cultivated and wild tomato accessions. FIS1 encodes a GA2-oxidase, and its mutation leads to increased bioactive gibberellin content, enhanced cutin and wax biosynthesis, and increased fruit firmness and shelf life. Importantly, FIS1 has no unfavorable effect on fruit weight or taste, making it an ideal target for breeders. Our study demonstrates that FIS1 mediates gibberellin catabolism and regulates fruit firmness, and it offers a potential strategy for tomato breeders to produce firmer fruit. Fruit firmness is an important target for breeders and a key determinant of shelf life for many fruits. Here the authors show that mutating tomato FIS1, a GA2-oxidase, increases the concentration of bioactive gibberellins, enhances cutin and wax biosynthesis and increases fruit firmness.

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