abstract Changes in gene expression patterns by high nitrogen (High-N) and High-N plus cooling at the young microspore stage (High-N-cooling) in rice mature anthers were analyzed by semiquantitative RT-PCR with gene specific primers. Gene expression of alpha-expansin 18 (EXPA18) was repressed under High-N-cooling. Beta-expansin 1 (EXPB1), putative aldehyde dehydrogenase (ALDH) and Fructokinase II (FKII) were upregulated under High-N. EXPB1 and FKII were highly expressed under High-N-cooling. Comprehensive examination of gene expression patterns of 26 alpha-expansins (EXPAs) and 16 beta-expansins (EXPB s) showed that all expansins (EXP s)except EXPA12 were expressed in the anthers. Gene expression of EXP s did not change under High-N except EXPA1, EXPB1 and EXPB5 which were upregulated. In total, 18 EXPAs and 6 EXPB s were repressed under High-N-cooling, and among these, EXPA18, EXPA19 and EXPA20 had high similarities in the amino acid sequences, suggesting that these three genes may constitute a distinct functional gene subfamily related to the decrease in the pollen germination ability.
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.): Gene Expression Analysis in Mature Anthers
Takami Hayashi,Tomoya Yamaguchi,K. Nakayama,S. Koike
Published 2009 in Plant Production Science
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- Publication year
2009
- Venue
Plant Production Science
- Publication date
2009-01-01
- Fields of study
Agricultural and Food Sciences, Biology
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