IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
A novel regulatory system in plants involving medium-chain fatty acids
Autor/es:
GRETEL MARA HUNZICKER
Revista:
PLANTA
Editorial:
Springer
Referencias:
Lugar: Springer Berlin / Heidelberg; Año: 2009 vol. 231 p. 143 - 153
ISSN:
0032-0935
Resumen:
 Polyethylene glycol sorbitan monoacylates(Tween) are detergents of widespread use in plantsci compounds. Interences. However, little is known about the plant response to theseestingly, the structure of Tweens’detergents (especially from Tween 20) resembles the lipidA structure from gram-negative bacteria polysaccharides (abackbone with short saturated fatty acids). Thus, differentassays (microarray, GC–MS, RT–PCR, Northern blots,alkalinization and mutant analyses) were conducted inorder to elucidate physiological changes in the plantresponse to Tween 20 detergent. Tween 20 causes a rapidand complex change in transcript abundance which bearsall characteristics of a pathogenesis-associated molecularpattern (PAMP)/elicitor-induced defense response, andthey do so at concentrations which cause no detectabledeleterious effects on plant cellular integrity. In the presentwork, it is shown that the PAMP/elicitor-induced defenseresponses are caused by medium-chain fatty acids whichare efficiently released from the Tween backbone by theplant, notably lauric acid (12:0) and methyl lauric acid.These compounds induce the production of ethylene,medium alkalinization and gene activation in a jasmonateindependentmanner. Medium-chain fatty acids are thusnovel elicitors/regulators of plant pathogen defense as theyhave being proved in animals.