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JXB Advance Access published online on November 28, 2003
Journal of Experimental Botany, doi:10.1093/jxb/erh029
© 2003 by Oxford University Press
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Received July 17, 2003; accepted October 7, 2003
© 2003 Society for Experimental Biology

GENE NOTE

The rice pyruvate decarboxylase 3 gene, which lacks introns, is transcribed in mature pollen

Yuhua Li 1, Kazuhiro Ohtsu 2, Keisuke Nemoto 3, Nobuhiro Tsutsumi 2, Atsushi Hirai 2, and Mikio Nakazono 2*

1 Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo,Tokyo 113-8657, Japan; Research Institute of Flower Biotechnology, Northeast Forestry University, Harbin 150040, China
2 Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo,Tokyo 113-8657, Japan
3 Asian Natural Environmental Science Center, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan

* To whom correspondence should be addressed. E-mail: anakazo{at}mail.ecc.u-tokyo.ac.jp.


  Abstract

The rice pyruvate decarboxylase 3 gene (PDC3), which has no introns, was previously postulated to be a pseudogene because no PDC3 mRNA had been detected, even under anaerobic conditions. However, in this study, it was found that rice PDC3 transcripts accumulated in panicles after heading. Within anthers obtained from the panicles, PDC3 was shown to be transcribed in mature pollen by in situ hybridization. These results suggest that the rice PDC3 is a functional gene. Its product may play a role in aerobic alcoholic fermentation in mature pollen.

Key words: Alcoholic fermentation, intron-less gene, Oryza sativa, pollen, pyruvate decarboxylase.


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