Reference "The rice FON1 gene controls vegetative and reproductive development by regulating shoot apical meristem size"

Reference ID

11103

Title

The rice FON1 gene controls vegetative and reproductive development by regulating shoot apical meristem size

Source

Molecules and cells, 2006, vol. 21, pp. 147-152

Authors (8)

Moon-S	Jung-K-H
Lee-D-E	Lee-D-Y
Lee-J	An-K
Kang-H-G	An-G

Abstract

Most plant organs develop from meristems. Rice FON1, which is an ortholog of
Clv1, regulates stem cell proliferation and organ initiation. The point muta-
tions, fon1-1 and fon1-2, disrupt meristem balance, resulting in alteration of
floral organ numbers and the architecture of primary rachis branches. In this
study, we identified two knockout alleles, fon1-3 and fon1-4, generated by T-DNA
and Tos17 insertion, respectively. Unlike the previously isolated point mutants,
the null mutants have alterations not only of the reproductive organs but also
of vegetative tissues, producing fewer tillers and secondary rachis branches.
The mutant plants are semi-dwarfs due to delayed leaf emergence, and leaf
senescence is delayed. SEM analysis showed that the shoot apical meristems of
fon1-3 mutants are enlarged. These results indicate that FON1 controls
vegetative as well as reproductive development by regulating meristem size.