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Article|21 Feb 2022|OPEN
Cucumber glossy fruit 1 (CsGLF1) encodes the zinc finger protein 6 that regulates fruit glossiness by enhancing cuticular wax biosynthesis
Yan Yang1 ,† , Congxi Cai1 , ,† , Yipeng Wang1 , Yanran Wang1 , Haolun Ju1 and Xuehao Chen,1 ,
1School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, Jiangsu Province, China
*Corresponding author. E-mail: 007180@yzu.edu.cn,xhchen@yzu.edu.cn
Both authors contributed equally to the study.

Horticulture Research 10,
Article number: uhac237 (2023)
doi: https://doi.org/10.1093/hr/uhac237
Views: 73


Revised: 29 Oct 2022
Accepted: 16 Oct 2022
Published online: 21 Feb 2022

Abstract

Cucumber glossiness is an important visual quality trait that affects consumer choice. Accumulating evidence suggests that glossy trait is associated with cuticular wax accumulation. However, the molecular genetic mechanism controlling cucumber glossiness remains largely unknown. Here, we report the map-based cloning and functional characterization of CsGLF1, a locus that determines the glossy trait in cucumber. CsGLF1 encodes a homolog of the Cys2His2-like fold group (C2H2) -type zinc finger protein 6 (ZFP6) and its deletion leads to glossier pericarp and decreased cuticular wax accumulation. Consistently, transcriptomic analysis demonstrated that a group of wax biosynthetic genes were downregulated when CsZFP6 was absent. Further, transient expression assay revealed that CsZFP6 acted as a transcription activator of cuticular wax biosynthetic genes. Taken together, our findings demonstrated a novel regulator of fruit glossiness, which will provide new insights into regulatory mechanism of fruit glossiness in cucumber.