硝酸イオンによる種子発芽の調節

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タイトル別名
  • Nitrate-regulated seed germination
  • ショウサン イオン ニ ヨル シュシ ハツガ ノ チョウセツ

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説明

<p>Nitrate promotes seed germination in many plant species.　Its effect can be seen at low concentrations （< 1 mM） and even in the nitrate reductase deficient mutant, suggesting that nitrate itself, not assimilates, acts as a signal to promote seed germination.　Arabidopsis molecular genetics research have revealed that nitrate-induced expression of CYP707A2, encoding an abscisic acid （ABA） catabolism enzyme, play an important role in this process.　This regulation involves NIN-LIKE PROTEIN 8 （NLP8） transcription factor.　Nitrate activates NLP8, which allows directly binding the Nitrate Responsive Element （NRE） in the CYP707A2 promoter.　The induction of CYP707A2 leads to the decrease in seed ABA contents, which in turn promotes seed germination.　Understanding the function of nitrate in plants will be useful to create crops with low nitrogen use.</p>

収録刊行物

  • 植物の生長調節

    植物の生長調節 54 (1), 39-43, 2019

    一般社団法人 植物化学調節学会

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