Reference "The ANTHER INDEHISCENCE1 gene encoding a single MYB domain protein is involved in anther development in rice"

Reference ID

8303

Title

The ANTHER INDEHISCENCE1 gene encoding a single MYB domain protein is involved in anther development in rice

Source

Plant physiology, 2004, vol. 135, pp. 1514-1525

Authors (5)

Zhu-Q-H	Ramm-K
Shivakkumar-R	Dennis-E-S
Upadhyaya-N-M

Abstract

Using a two-element iAc/Ds transposon-tagging system, we identified a rice
(Oryza sativa L. cv Nipponbare) recessive mutant, anther indehiscence1 (aid1),
showing partial to complete spikelet sterility. Spikelets of the aid1 mutant
could be classified into three types based on the viability of pollen grains and
the extent of anther dehiscence. Type 1 spikelets (approximately 25%) were
sterile due to a failure in accumulation of starch in pollen grains. Type 2
spikelets (approximately 55%) had viable pollen grains, but anthers failed to
dehisce and/or synchronize with anthesis due to failure in septum degradation
and stomium breakage, resulting in sterility. Type 3 spikelets (approximately
20%) had normal fertility. In addition, aid1 mutant plants had fewer tillers and
flowered 10 to 15 d later than the wild type. The Ds insertion responsible for
the aid1 mutation was mapped within the coding region of the AID1 gene on
chromosome 6, which is predicted to encode a novel protein of 426 amino acids
with a single MYB domain. The MYB domain of AID1 is closely related to that of
the telomere-binding proteins of human, mouse, and Arabidopsis, and of single
MYB domain transcriptional regulators in plants such as PcMYB1 and ZmIBP1. AID1
was expressed in both the leaves and panicles of wild-type plants, but not in
mutant plants.