Reference "ABERRANT PANICLE ORGANIZATION 1 temporally regulates meristem identity in rice"

Reference ID

11082

Title

ABERRANT PANICLE ORGANIZATION 1 temporally regulates meristem identity in rice

Source

Developmental biology, 2005, vol. 282, pp. 349-360

Authors (3)

Ikeda-K	Nagasawa-N
Nagato-Y

Abstract

We report a recessive mutation of rice, aberrant panicle organization 1 (apo1),
which severely affects inflorescence architecture, floral organ identity, and
leaf production rate. In the wild-type inflorescence, the main-axis meristem
aborts after forming 10-12 primary branch primordia. However, in apo1, the main-
axis meristem was converted to a spikelet meristem after producing a small
number of branch primordia. In addition, the branch meristems in apo1 became
spikelet meristems earlier than in wild type. Therefore, in the inflorescence,
the apo1 mutation caused the precocious conversion of the meristem identity. In
the apo1 flower, lodicules were increased at the expense of stamens, and carpels
were formed indeterminately by the loss of meristem determinacy. Vegetative
development is also affected in the apo1. Leaves were formed rapidly throughout
the vegetative phase, indicating that APO1 is also involved in temporal
regulation of leaf production. These phenotypes suggest that the APO1 plays an
important role in the temporal regulation of both vegetative and reproductive
development.