New advance in plant signaling during herbivory stress: Identification of jasmonoyl-L-isoleucine hydrolase in plants.

[著者] Woldemariam MG, Onkokesung N, Baldwin IT and Galis I

[論文タイトル] Jasmonoyl-L-isoleucine hydrolase 1 (JIH1) regulates jasmonoyl-L-isoleucine levels and attenuates plant defenses against herbivores

The Plant Journal 72: 758-767 (2012)
doi: 10.1111/j.1365-313X.2012.05117.x

Jasmonoyl-L-isoleucine (JA-Ile) is the key signal in defense of plants against herbivores. While the biosynthesis of JA-Ile is well resolved, inactivation of JA-Ile was thought to occur exclusively via hydroxylation pathway. Here, we show an alternative pathway in JA-Ile inactivation that is dependent on the activity of JIH1 protein: this enzyme hydrolyses JA-Ile to its inactive precursor jasmonic acid (JA). Our results demonstrate how plants switch off their defense signaling and prepare for a new attack from herbivores in the nature.
Experiments presented in this paper were conducted under direct support of Max-Planck Institute for Chemical Ecology in Jena, Germany (previous workplace of I. Galis ~March 2011).
(文責 Group of Plant-Insect Interactions・Ivan Galis)

関連リンク: Group of Plant-Insect Interactions