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UGT87A2, an Arabidopsis glycosyltransferase, regulates flowering time via FLOWERING LOCUS C
Author(s) -
Wang Bo,
Jin ShangHui,
Hu HongQun,
Sun YanGuo,
Wang YanWen,
Han Ping,
Hou BingKai
Publication year - 2012
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2012.04107.x
Subject(s) - arabidopsis , biology , flowering locus c , mutant , vernalization , glycosyltransferase , complementation , locus (genetics) , genetics , gene , repressor , wild type , gene family , gene expression
Summary• Family 1 glycosyltransferases comprise the greatest number of glycosyltransferases found in plants. The widespread occurrence and diversity of glycosides throughout the plant kingdom underscore the importance of these glycosyltransferases. • Here, we describe the identification and characterization of a late‐flowering Arabidopsis ( Arabidopsis thaliana ) mutant, in which a putative family 1 glycosyltransferase gene, UGT87A2 , was disrupted. The role and possible mechanism of UGT87A2 in the regulation of flowering were analyzed by molecular, genetic and cellular approaches. • The ugt87a2 mutant exhibited late flowering in both long and short days, and its flowering was promoted by vernalization and gibberellin. Furthermore, the mutant flowering phenotype was rescued by the wild‐type UGT87A2 gene in complementation lines. Interestingly, the expression of the flowering repressor FLOWERING LOCUS C was increased substantially in the mutant, but decreased to the wild‐type level in complementation lines, with corresponding changes in the expression levels of the floral integrators and floral meristem identity genes. The expression of UGT87A2 was developmentally regulated and its protein products were distributed in both cytoplasm and nucleus. • Our findings imply that UGT87A2 regulates flowering time via the flowering repressor FLOWERING LOCUS C . These data highlight an important role for the family 1 glycosyltransferases in the regulation of plant flower development.