Browse Articles

Article|21 Feb 2023|OPEN
SlZF3 regulates tomato plant height by directly repressing SlGA20ox4 in the gibberellic acid biosynthesis pathway 
Jinying Luo1 , Yunfei Tang1 , Zhuannan Chu1 , Yuxin Peng1 , Jiawei Chen1 , Huiyang Yu1 , Chunmei Shi1 , Jahanzeb Jafar1 , Rong Chen1 , Yaping Tang1 , Yongen Lu1 , Zhibiao Ye1 , Ying Li2 , and Bo Ouyang,1 ,
1National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
2College of Horticulture, Henan Agricultural University, Zhengzhou 450002, China
*Corresponding author. E-mail:,

Horticulture Research 10,
Article number: uhad025 (2023)
Views: 220

Received: 28 Nov 2022
Accepted: 15 Feb 2023
Published online: 21 Feb 2023


Plant height is an important target trait for crop genetic improvement. Our previous work has identified a salt-tolerant C2H2 zinc finger, SlZF3, and its overexpression lines also showed a semi-dwarf phenotype, but the molecular mechanism remains to be elucidated. Here, we characterized the dwarf phenotype in detail. The dwarfism is caused by a decrease in stem internode cell elongation and deficiency of bioactive gibberellic acids (GAs), and can be rescued by exogenous GA3 treatment. Gene expression assays detected reduced expression of genes in the GA biosynthesis pathway of the overexpression lines, including SlGA20ox4. Several protein–DNA interaction methods confirmed that SlZF3 can directly bind to the SlGA20ox4 promoter and inhibit its expression, and the interaction can also occur for SlKS and SlKO. Overexpression of SlGA20ox4 in the SlZF3-overexpressing line can recover the dwarf phenotype. Therefore, SlZF3 regulates plant height by directly repressing genes in the tomato GA biosynthesis pathway.