Author: Jaff Felix W. Tattersall Alexander Glover Beverley J.
Publisher: Oxford University Press
ISSN: 1460-2431
Source: Journal of Experimental Botany, Vol.58, Iss.6, 2007-04, pp. : 1515-1524
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Plant MYB genes can be divided into subgroups on the basis of additional conserved regions of sequence. In some cases, genes within a subgroup share similarities in function, as well as sequence. The functions of three proteins in subgroup 9 have been described, with AmMYBMX regulating the differentiation of conical-papillate petal epidermal cells, PhMYB1 involved in extending the growth of these cells, and AmMYBML1 involved in differentiation of several petal epidermal cell types. Here, the isolation of a gene encoding a new member of MYB subgroup 9, AmMYBML3 (Antirrhinum majus MYB MIXTA-LIKE 3) is described, which contains the defining regions of conserved sequence but is lacking the majority of the C-terminus, including the amphipathic -helix presumed necessary for transcriptional activation. AmMYBML3 is expressed in all aerial organs, but its expression is restricted to outgrowing epidermal cells, including trichomes, stigmatic papillae, and petal conical-papillate cells. Ectopic expression of AmMYBML3 in tobacco results in the formation of conical-papillate cells in the usually flat carpel epidermis. These data suggest that this protein is capable of altering epidermal development, thus resulting in cellular outgrowth, despite the missing C-terminus, and may act in conjunction with other transcriptional activators to enhance cellular outgrowth from the epidermis of all aerial organs.
Related content
By Horiuchi Jun-ichiro Badri Dayakar Kimball Bruce Negre Florence Dudareva Natalia Paschke Mark Vivanco Jorge
Planta, Vol. 226, Iss. 1, 2007-06 ,pp. :
AtMYB4: a transcription factor general in the battle against UV
By Hemm M.R. Herrmann K.M. Chapple C.
Trends in Plant Science, Vol. 6, Iss. 4, 2001-04 ,pp. :
By He Yanan Li Wei Lv Jian Jia Yuebin Wang Mengcheng Xia Guangmin
Journal of Experimental Botany, Vol. 63, Iss. 3, 2012-11 ,pp. :