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ASYMMETRIC LEAVES2-LIKE1 gene, a member of the AS2/LOB family, controls proximal-distal patterning in Arabidopsis petals.

ASYMMETRIC LEAVES2-LIKE1 gene, a member of the AS2/LOB family, controls proximal-distal patterning in Arabidopsis petals.

Authors :
Chalfun-Junior A
Franken J
Mes JJ
Marsch-Martinez N
Pereira A
Angenent GC
Source :
Plant molecular biology [Plant Mol Biol] 2005 Mar; Vol. 57 (4), pp. 559-75.
Publication Year :
2005

Abstract

The formation and the development of the floral organs require an intercalate expression of organ-specific genes. At the same time, meristem-specific genes are repressed to complete the differentiation of the organs in the floral whorls. In an Arabidopsis activation tagging population, a mutant affected in inflorescence architecture was identified. This gain-of-function mutant, designated downwards siliques1 (dsl1-D), has shorter internodes and the lateral organs such as flowers are bending downwards, similar to the loss-of-function brevipedicellus (bp) mutant. The affected gene in dsl1-D appeared to be ASYMMETRIC LEAVES2-LIKE1 (ASL1)/LATERAL ORGAN BOUNDARIES domain gene 36 (LBD36), which is a member of the ASYMMETRIC LEAVES2 (AS2)/LATERAL ORGAN BOUNDARIES (LOB) domain gene family. Analysis of the loss-of-function mutant asl1/lbd36 did not show morphological aberration. Double mutant analysis of asl1/lbd36 together with as2, the ASL1/LBD36 closest homologue, demonstrates that these two members of the AS2/LOB family act partially redundant to control cell fate determination in Arabidopsis petals. Moreover, molecular analysis revealed that overexpression of ASL1/LBD36 leads to repression of the homeobox gene BP, which supports the model that an antagonistic relationship between ASL/LBD and homeobox members is required for the differentiation of lateral organs.

Details

Language :
English
ISSN :
0167-4412
Volume :
57
Issue :
4
Database :
MEDLINE
Journal :
Plant molecular biology
Publication Type :
Academic Journal
Accession number :
15821980
Full Text :
https://doi.org/10.1007/s11103-005-0698-4