The squeeze cell hypothesis for the activation of jasmonate synthesis in response to wounding

Jasmonates are lipid mediators that control defence gene expression in response to wounding and other environmental stresses. These small molecules can accumulate at distances up to several cm from sites of damage and this is likely to involve cell-to-cell jasmonate transport.Also, and independently...

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Veröffentlicht in:The New phytologist. - 1990. - 204(2014), 2 vom: 08. Okt., Seite 282-8
1. Verfasser: Farmer, Edward E (VerfasserIn)
Weitere Verfasser: Gasperini, Debora, Acosta, Iván F
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Review electrical signal, glutamate receptor-like, hydraulic signal, jasmonate, mechanosensor, plasmodesmata, squeeze cell hypothesis, mehr... wounding Arabidopsis Proteins Cyclopentanes Oxylipins Plant Growth Regulators Receptors, Neurotransmitter glutamine receptor jasmonic acid 6RI5N05OWW Lipoxygenase EC 1.13.11.12
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520 |a Jasmonates are lipid mediators that control defence gene expression in response to wounding and other environmental stresses. These small molecules can accumulate at distances up to several cm from sites of damage and this is likely to involve cell-to-cell jasmonate transport.Also, and independently of jasmonate synthesis, transport and perception, different long distance wound signals that stimulate distal jasmonate synthesis are propagated at apparent speeds of several cm min–1 to tissues distal to wounds in a mechanism that involves clade 3 GLUTAMATE RECEPTOR-LIKE (GLR) genes. A search for jasmonate synthesis enzymes that might decode these signals revealed LOX6, a lipoxygenase that is necessary for much of the rapid accumulation of jasmonic acid at sites distal to wounds. Intriguingly, the LOX6 promoter is expressed in a distinct niche of cells that are adjacent to mature xylem vessels,a location that would make these contact cells sensitive to the release of xylem water column tension upon wounding. We propose a model in which rapid axial changes in xylem hydrostatic pressure caused by wounding travel through the vasculature and lead to slower,radially dispersed pressure changes that act in a clade 3 GLR-dependent mechanism to promote distal jasmonate synthesis 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Review 
650 4 |a electrical signal, 
650 4 |a glutamate receptor-like, 
650 4 |a hydraulic signal, 
650 4 |a jasmonate, 
650 4 |a mechanosensor, 
650 4 |a plasmodesmata, 
650 4 |a squeeze cell hypothesis, 
650 4 |a wounding 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a Cyclopentanes  |2 NLM 
650 7 |a Oxylipins  |2 NLM 
650 7 |a Plant Growth Regulators  |2 NLM 
650 7 |a Receptors, Neurotransmitter  |2 NLM 
650 7 |a glutamine receptor  |2 NLM 
650 7 |a jasmonic acid  |2 NLM 
650 7 |a 6RI5N05OWW  |2 NLM 
650 7 |a Lipoxygenase  |2 NLM 
650 7 |a EC 1.13.11.12  |2 NLM 
700 1 |a Gasperini, Debora  |e verfasserin  |4 aut 
700 1 |a Acosta, Iván F  |e verfasserin  |4 aut 
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773 1 8 |g volume:204  |g year:2014  |g number:2  |g day:08  |g month:10  |g pages:282-8 
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