Oil body-mediated defense against fungi: From tissues to ecology

Plant Signaling & Behavior
Takashi L ShimadaIkuko Hara-Nishimura

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.

References

Mar 14, 2002·Plant Physiology·Yuehui HeSusheng Gan
Oct 27, 2009·Nucleic Acids Research·Motohiro MiharaTakeshi Izawa
Apr 8, 2010·Comptes rendus biologies·Anne GuiboileauCéline Masclaux-Daubresse
Mar 19, 2013·Plant Science : an International Journal of Experimental Plant Biology·Manuel A Troncoso-PonceJohn B Ohlrogge
Nov 12, 2013·Plant Physiology·Takashi L ShimadaIkuko Hara-Nishimura

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Citations

Jun 9, 2015·Current Opinion in Plant Biology·Takashi L Shimada, Ikuko Hara-Nishimura
Apr 12, 2020·Plants·Junhao LuGuanqun Chen
Nov 13, 2019·Nature Plants·Takashi L ShimadaIkuko Hara-Nishimura
Oct 6, 2020·Frontiers in Plant Science·Krzysztof Zienkiewicz, Agnieszka Zienkiewicz
Oct 11, 2017·Current Opinion in Biotechnology·Yang Yang, Christoph Benning

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