Journal of General Plant Pathology (2003) 69, 378-384

Eiichi Nakane, Kazuhito Kawakita, Noriyuki Doke and Hirofumi Yoshioka (2003)
Elicitation of primary and secondary metabolism during defense in the potato
Journal of General Plant Pathology 69 (6), 378-384
Abstract: Exposure of potato tuber tissues to Phytophthora infestans, the late blight pathogen, elicits multiple defense responses, including an oxidative burst, accumulation of phenylpropanoid compounds, and sesquiterpenoid phytoalexins (lubimin and rishitin), which are accompanied by de novo synthesis of the enzymes that produce them. These reactions are also induced in potato tubers treated with a crude elicitor (hyphal wall components, or HWC) prepared from the mycelia of the pathogen. Differential hybridization was used to identify elicitor-responsive cDNAs from potato tubers. Database searches revealed that these genes appear to encode tyramine hydroxycinnamoyl transferase, arginine decarboxylase, glucose 6-phosphate dehydrogenase, 3-deoxy-d-arabino-heptulosonate 7-phosphate synthase, NADP-dependent malic enzyme, pyruvate decarboxylase, and other potential defense components. RNA gel blot analyses indicated that the accumulation of transcripts related to both secondary and primary metabolism was induced by the HWC elicitor, arachidonic acid or salicylic acid. This suggests that the signals from the pathogen activate not only secondary metabolism but also the primary metabolism that supports the rapid expression of defense responses in potato tubers.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Hirofumi Yoshioka, Kazuhito Kawakita

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phytophthora infestans	Potato (Solanum tuberosum)