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Title: Oil body-mediated defense against fungi: From tissues to ecology.
Authors: Shimada, Takashi L
Takano, Yoshitaka  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-1427-1322 (unconfirmed)
Hara-Nishimura, Ikuko
Author's alias: 島田, 貴士
西村, いくこ
Keywords: abscised leaf
caleosin
fungal infection
oil body
oxylipin
phytoalexin
senescence
α-dioxygenase
CLO3
caleosin3
2-HOT
2-hydroxy-octadecatrienoic acid
HPOT
hydroperoxyoctadecatrienoic acid
LTP3
lipid transfer protein 3
GPAT2
glycerol-3-phosphate acyltransferase 2
LOX
lipoxygenase
Issue Date: 12-Mar-2015
Publisher: Taylor & Francis Group
Journal title: Plant signaling & behavior
Volume: 10
Issue: 2
Thesis number: e989036
Abstract: Oil bodies are localized in the seed cells and leaf cells of many land plants. They have a passive function as storage organelles for lipids. We recently reported that the leaf oil body has an active function as a subcellular factory that produces an antifungal oxylipin during fungal infection in Arabidopsis thaliana. Here, we propose a model for oil body-mediated plant defense. Remarkably, senescent leaves develop oil bodies and accumulate α-dioxygenase1 (α-DOX1) and caleosin3 (CLO3) on the oil-body membrane, which catalyze the conversion of α-linolenic acid to the phytoalexin 2-hydroxy-octadecatrienoic acid (2-HOT). The model proposes that senescent leaves actively produce antifungal oxylipins and phytoalexins, and abscised leaves contain a mixture of antifungal compounds. In natural settings, the abscised leaves with antifungal compounds accumulate in leaf litter and function to protect healthy tissues and young plants from fungal infection. Plants might have evolved this ecological function for dead leaves.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in "Plant Signaling & Behavior" on 12 Mar 2015, available online: http://www.tandfonline.com/10.4161/15592324.2014.989036.
The full-text file will be made open to the public on 12 Mar 2016 in accordance with publisher's 'Terms and Conditions for Self-Archiving'
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/199568
DOI(Published Version): 10.4161/15592324.2014.989036
PubMed ID: 25764319
Appears in Collections:Journal Articles

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