期刊
FEBS LETTERS
卷 585, 期 2, 页码 435-439出版社
WILEY
DOI: 10.1016/j.febslet.2010.12.036
关键词
Tomato; miR156; Plant architecture; Inflorescence structure; Fruit development
资金
- National Natural Science Foundation of China [30921002, 30871712]
- 863 Program [2009AA10Z104-1]
- 973 Program [2011CB100600]
- Modern Agro-industry Technology Research System [Nycytx-35-gw02]
Plant microRNAs (miRNAs) are vital components of the translation control system that regulates plant development and reproduction. The biological function of sly-miR156 was investigated by over-expression in tomato plants. Transgenic tomato plants exhibited a drastically altered phenotype, with reduced height, smaller but more numerous leaves, and smaller fruit. The inflorescence structure of sly-miR156 over-expressing plants phenocopied the sft mutant. The putative targets of sly-miR156 were identified by data base search and included six SQUAMOSA PROMOTER BINDING PROTEIN (SBP)-box transcription factor genes. Their expression patterns were then determined in 35S-miR156a and wild type tomato plants. These target genes, as well as the tomato FLOWERING LOCUS T (FT) ortholog SFT, were significantly down-regulated in sly-miR156 over-expressing plants. These studies reveal novel phenotypes regulated by miR156. (C) 2010 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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