Os04g0598300

The rice gene Os04g0598300 was reported as APO2 in 2012 by researchers from Japan.

Annotated Information

Function

• The rice aberrant panicle organization 2 (apo2) mutant which exhibits small panicles with reduced number of primary branches due to the precocious formation of spikelet meristems. The apo2 mutants also display a shortened plastochron in the vegetative phase, late flowering, aberrant floral organ identities and loss of floral meristem determinacy.

• APO2/RFL and APO1, the rice ortholog of Arabidopsis UNUSUAL FLORAL ORGANS, act cooperatively to control inflorescence and flower development.

• Map-based cloning revealed that APO2' is identical to previously reported RFL gene, the rice ortholog of the Arabidopsis LEAFY (LFY) gene. The present study revealed functional differences between APO2/RFL and LFY. In particular, APO2/RFL and LFY act oppositely on inflorescence development. Therefore, the genetic mechanisms for controlling inflorescence architecture have evolutionarily diverged between rice (monocots) and Arabidopsis (eudicots).

Expression

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Evolution

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Labs working on this gene

• Graduate School of Agriculture and Life Sciences, University of Tokyo, Yayoi, Bunkyo, Tokyo 113-0032, Japan,
• National Institute for Bioresources, Okayama University, Kurashiki, Okayama 710-0046, Japan, and
• National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan