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A 13-LOX hierarchy for defence in Arabidopsis thaliana

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Farmer, Edward Elliston
Defense Thèse de doctorat : Univ. Genève, 2014 - Sc. 4721 - 2014/08/29
Abstract 13-lipoxygenases (13-LOXs) initiate the first enzymatic reaction in jasmonate synthesis which is essential for the activation of defence against herbivores. Jasmonates are wound- inducible compounds that accumulate in a wide time frame from seconds to hours after tissue damage. Jasmonate production begins in plastids and, in Arabidopsis thaliana, four 13-LOXs (LOX2, LOX3, LOX4 and LOX6) incorporate molecular oxygen on the C13 of the α-linolenic acid. Among the four 13-LOXs, LOX2 has been the most widely studied while LOX3, LOX4 and LOX6 remain poorly described. In the present work, we found that each 13-LOX acts differently in response to insect attacks with 1) distinct promoter activities 2) different signalling dynamics and 3) controlling different defences against herbivores.
Keywords Plant-insect interactionArabidopsisHerbivoryWoundingAnalytical chemistryMolecular biologyBioassay
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URN: urn:nbn:ch:unige-419999
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CHAUVIN, Adeline. A 13-LOX hierarchy for defence in Arabidopsis thaliana. Université de Genève. Thèse, 2014. https://archive-ouverte.unige.ch/unige:41999

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Deposited on : 2014-11-19

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