Molecular cloning and characterization of a cDNA encoding <i>ent</i>‐cassa‐12,15‐diene synthase, a putative diterpenoid phytoalexin biosynthetic enzyme, from suspension‐cultured rice cells treated with a chitin elicitor

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公開日
2003-11-03
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  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1046/j.1365-313x.2003.01926.x
公開者
Wiley

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<jats:title>Summary</jats:title><jats:p>We have isolated and characterized a cDNA encoding a novel diterpene cyclase, OsDTC1, from suspension‐cultured rice cells treated with a chitin elicitor. OsDTC1 functions as <jats:italic>ent</jats:italic>‐cassa‐12,15‐diene synthase, which is considered to play a key role in the biosynthesis of (−)‐phytocassanes recently isolated as rice diterpenoid phytoalexins. The expression of <jats:italic>OsDTC1</jats:italic> mRNA was also confirmed in ultraviolet (UV)‐irradiated rice leaves. In addition, we identified <jats:italic>ent</jats:italic>‐cassa‐12,15‐diene, a putative diterpene hydrocarbon precursor of (−)‐phytocassanes, as an endogenous compound in the chitin‐elicited suspension‐cultured rice cells and the UV‐irradiated rice leaves. The OsDTC1 cDNA isolated here will be a useful tool to investigate the regulatory mechanisms of the biosyntheis of (−)‐phytocassanes in rice.</jats:p>

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