title: Uniform ripening encodes a Golden 2-like transcription factor regulating tomato fruit chloroplast development.
abstract: Modern tomato (Solanum lycopersicum) varieties are bred for uniform ripening (u) light green fruit phenotypes to facilitate harvests of evenly ripened fruit. U encodes a Golden 2-like (GLK) transcription factor, SlGLK2, which determines chlorophyll accumulation and distribution in developing fruit. In tomato, two GLKs--SlGLK1 and SlGLK2--are expressed in leaves, but only SlGLK2 is expressed in fruit. Expressing GLKs increased the chlorophyll content of fruit, whereas SlGLK2 suppression recapitulated the u mutant phenotype. GLK overexpression enhanced fruit photosynthesis gene expression and chloroplast development, leading to elevated carbohydrates and carotenoids in ripe fruit. SlGLK2 influences photosynthesis in developing fruit, contributing to mature fruit characteristics and suggesting that selection of u inadvertently compromised ripe fruit quality in exchange for desirable production traits.
authors: Plant Sciences Department, University of California, Davis, CA 95616, USA. alpowell@ucdavis.edu
authors: Ann L T
authors: AL
authors: Powell
authors: Cuong V
authors: CV
authors: Nguyen
authors: Theresa
authors: T
authors: Hill
authors: Kalai Lam
authors: KL
authors: Cheng
authors: Rosa
authors: R
authors: Figueroa-Balderas
authors: Hakan
authors: H
authors: Aktas
authors: Hamid
authors: H
authors: Ashrafi
authors: Clara
authors: C
authors: Pons
authors: Rafael
authors: R
authors: Fernández-Muñoz
authors: Ariel
authors: A
authors: Vicente
authors: Javier
authors: J
authors: Lopez-Baltazar
authors: Cornelius S
authors: CS
authors: Barry
authors: Yongsheng
authors: Y
authors: Liu
authors: Roger
authors: R
authors: Chetelat
authors: Antonio
authors: A
authors: Granell
authors: Allen
authors: A
authors: Van Deynze
authors: James J
authors: JJ
authors: Giovannoni
authors: Alan B
authors: AB
authors: Bennett
mesh_terms: D002736:Chloroplasts / Q000235:genetics* / Q000502:physiology; D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D005638:Fruit / Q000235:genetics / Q000254:growth & development; D018551:Solanum lycopersicum / Q000235:genetics* / Q000254:growth & development*; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics* / Q000502:physiology; D014157:Transcription Factors / Q000235:genetics* / Q000502:physiology
chemical_list: D010940:Plant Proteins; D014157:Transcription Factors