ヒメツリガネゴケの成長制御物質に関する生合成研究

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  • Biosynthetic studies on plant growth regulators in a moss <i>Physcomitrella patens</i>
  • 奨励賞 ヒメツリガネゴケの成長制御物質に関する生合成研究
  • ショウレイショウ ヒメツリガネゴケ ノ セイチョウ セイギョ ブッシツ ニ カンスル セイゴウセイ ケンキュウ

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<p>The moss Physcomitrella patens does not respond to active gibberellins （GAs）, and GAs have not been detected in the moss.　However, P. patens has a partial GA biosynthetic pathway that mediates the biosynthesis of the GA intermediate ent-kaurenoic acid （KA）.　Previous work demonstrated that P. patens KA-deficient mutants have defects in protonemal cell differentiation, which are restored by the application of KA but not by GAs.　Recently, I demonstrated that a KA-derived diterpenoid functions as a potent regulator of protonemal cell differentiation in the moss.　Bioassay-guided exploration with a KA-deficient mutant led to the detection of a bioactive metabolite from KA, and its structure was elucidated as ent-3β-hydroxy-kaurenoic acid.　Transcriptome analysis identified a gene encodes a putative 2-oxoglutarate-dependent dioxygenase involved in the oxidation of KA to ent-2α-hydroxy-kaurenoic acid, an inactive metabolite in protonemal cell differentiation.　My study showed that P. patens converts KA to an active form by 3-oxidation and to an inactive form by 2-oxidation, identifying a potential activation/inactivation system for GA biosynthesis in flowering plants.　Here I summarize the biosynthetic studies on GA-like plant growth regulators in a P. patens.</p>

収録刊行物

  • 植物の生長調節

    植物の生長調節 54 (1), 17-25, 2019

    一般社団法人 植物化学調節学会

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