Publication Date:
2012-06-30
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Powell, Ann L T -- Nguyen, Cuong V -- Hill, Theresa -- Cheng, Kalai Lam -- Figueroa-Balderas, Rosa -- Aktas, Hakan -- Ashrafi, Hamid -- Pons, Clara -- Fernandez-Munoz, Rafael -- Vicente, Ariel -- Lopez-Baltazar, Javier -- Barry, Cornelius S -- Liu, Yongsheng -- Chetelat, Roger -- Granell, Antonio -- Van Deynze, Allen -- Giovannoni, James J -- Bennett, Alan B -- New York, N.Y. -- Science. 2012 Jun 29;336(6089):1711-5. doi: 10.1126/science.1222218.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Sciences Department, University of California, Davis, CA 95616, USA. alpowell@ucdavis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22745430" target="_blank"〉PubMed〈/a〉
Keywords:
Chloroplasts/*genetics/physiology
;
Chromosome Mapping
;
Chromosomes, Plant
;
Fruit/genetics/growth & development
;
Lycopersicon esculentum/*genetics/*growth & development
;
Phenotype
;
Plant Proteins/*genetics/physiology
;
Transcription Factors/*genetics/physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink