Work

YABBY Polarity Genes Mediate the Repression of KNOX Homeobox Genes in Arabidopsis

Year: 2002

Type: article

Abstract: The YABBY (YAB) genes specify abaxial cell fate in lateral organs in Arabidopsis. Loss-of-function mutants in two early-expressing YAB genes, FILAMENTOUS FLOWER (FIL) and YAB3, do not exhibit vegetative phenotypes as a result of redundancy. Mutations in these genes result in the derepression of the KNOX homeobox genes SHOOTMERISTEMLESS (STM), BREVIPEDICELLUS, and KNAT2 in the leaves and in the partial rescue of stm mutants. Here, we show that fil yab3 double mutants exhibit ectopic meristem formation on the adaxial surfaces of cotyledons and leaf blades. We propose that in addition to abaxial specification, lateral organ development requires YAB function to downregulate KNOTTED homeobox genes so that meristem initiation and growth are restricted to the apex.

Source: The Plant Cell

DOI: 10.1105/tpc.004911

Authors: Mande K. Kumaran, John L. Bowman, Venkatesan Sundaresan

Institutions: National University of Singapore, University of California, Davis

Language: English

Topic: Plant Molecular Biology Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: green

Funders: National Science Foundation, Genome Institute of Singapore

OpenAlex ID: W2145656045

FWCI: 16.78

Cites: 36

Cited by: 251

Related to: 9