Reference "Regional expression of the rice KN1-type homeobox gene family during embryo, shoot, and flower development"

Reference ID

3982

Title

Regional expression of the rice KN1-type homeobox gene family during embryo, shoot, and flower development

Source

The Plant cell, 1999, vol. 11, pp. 1651-1664

Authors (6)

Sentoku-N	Sato-Y
Kurata-N	Ito-Y
Kitano-H	Matsuoka-M

Abstract

We report the isolation, sequence, and pattern of gene expression of members of
the KNOTTED1 (KN1)-type class 1 homeobox gene family from rice. Phylogenetic
analysis and mapping of the rice genome revealed that all of the rice homeobox
genes that we have isolated have one or two direct homologs in maize. Of the
homeobox genes that we tested, all exhibited expression in a restricted region
of the embryo that defines the position at which the shoot apical meristem (SAM)
would eventually develop, prior to visible organ formation. Several distinct
spatial and temporal expression patterns were observed for the different genes
in this region. After shoot formation, the expression patterns of these homeobox
genes were variable in the region of the SAM. These results suggest that the
rice KN1-type class 1 homeobox genes function cooperatively to establish the SAM
before shoot formation and that after shoot formation, their functions differ.