文献类型： 外文期刊
作者： Lu, Yao 1 ; Li, Jinyan 1 ; Cheng, Ke 1 ; Zhu, Guoning 1 ; Zhu, Benzhong 1 ; Fu, Daqi 1 ; Qu, Guiqin 1 ; Luo, Yunbo 1 ; Ma, Liqun 1 ; Lin, Tao 1 ; Zhang, Chunjiao 2 ; Huang, Hua 3 ; Zhu, Hongliang 1 ;
作者机构： 1.China Agr Univ, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China
2.China Agr Univ, Beijing 100083, Peoples R China
3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Peoples R China
4.Minist Agr & Rural Affairs, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree R, Guangzhou 510640, Peoples R China
关键词： tomato fruit; cuticle formation; cutin biosynthesis; wax biosynthesis; BTB protein
期刊名称：PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：7.0 ）
ISSN： 0960-7412
年卷期： 2025 年 122 卷 5 期
页码：
收录情况： SCI
摘要： Fruit cuticle, as a specialized hydrophobic cell wall architecture covering the surface of fruit, is crucial for fruit resistance to biotic and abiotic stress. In this study, we found that the BTB protein, SlBTA2, can regulate the biosynthesis of fruit cuticle in tomato. SlBTA2 was mainly expressed in the epidermis of fruits. Knockout of SlBTA2 inhibits the formation of fruit cuticle, resulting in a reduced cuticle thickness, accelerated post-harvest water loss, uneven colouring and increased cell wall thickness. GC-MS quantification revealed drastic reductions of cutin (94%) and wax (34%) monomer content in slbta2 fruits, especially 9(10),16-dihydroxyhexadecanoic acid (>90%). Moreover, transcriptome profiling identified coordinated downregulation of key cuticle biosynthesis genes in mutant fruits, such as SlANL2b, SlLACS2, SlCER1-2, etc. Overall, our findings present that SlBTA2 is a novel breeding target for cuticle accumulation and post-harvest fruit qualities.
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