2012
DOI: 10.1371/journal.ppat.1002640
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Airborne Signals from a Wounded Leaf Facilitate Viral Spreading and Induce Antibacterial Resistance in Neighboring Plants

Abstract: Many plants release airborne volatile compounds in response to wounding due to pathogenic assault. These compounds serve as plant defenses and are involved in plant signaling. Here, we study the effects of pectin methylesterase (PME)-generated methanol release from wounded plants (“emitters”) on the defensive reactions of neighboring “receiver” plants. Plant leaf wounding resulted in the synthesis of PME and a spike in methanol released into the air. Gaseous methanol or vapors from wounded PME … Show more

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Cited by 103 publications
(175 citation statements)
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“…Pectin methylesterases (PMEs) catalyze the demethylesterification of pectin, releasing both protons and methanol. PME-dependent methanol emission has been shown to trigger PD dilation (51). In addition, PMEs have been shown to be involved with Tobamovirus local cell-to-cell movement through PD via an interaction with the TMV MP (52).…”
Section: Discussionmentioning
confidence: 99%
“…Pectin methylesterases (PMEs) catalyze the demethylesterification of pectin, releasing both protons and methanol. PME-dependent methanol emission has been shown to trigger PD dilation (51). In addition, PMEs have been shown to be involved with Tobamovirus local cell-to-cell movement through PD via an interaction with the TMV MP (52).…”
Section: Discussionmentioning
confidence: 99%
“…8,20 Specific PME isoforms are up-regulated upon infection by different viruses. [21][22][23] The accumulation of PME transcripts is induced by TMV in infected tobacco leaves. 23 We have found that PME activity is strongly induced in tobacco and Arabidopsis leaves during TMV and TVCV infection and we demonstrated, that the overexpression of PMEIs in tobacco and Arabidopsis transgenic plants, not only affects the existing PME activity but also inhibits the PME activity induced during viral infection.…”
mentioning
confidence: 99%
“…24 It has been recently demonstrated that PME-dependent methanol emission triggers PD dilation and facilitates cell-to-cell communication and viral spreading. 23 This effect has been related to expression of methanol-induced genes including b-1,3-glucanases cooperating to PD dilation by degrading callose, which is locally deposited at the cell wall embedded neck region of PD to restrict cell-to-cell movement of viruses. 23,25 The overexpression of PMEI in transgenic plants limits cell-to-cell viral spreading by affecting the viral-induced PME activity and possibly by reducing the methanol-activated degradation of callose.…”
mentioning
confidence: 99%
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