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PLoS One

Title:		Is Allelopathic Activity of Ipomoea murucoides Induced by Xylophage Damage?
Author(s):		Flores-Palacios A; Corona-Lopez AM; Rios MY; Aguilar-Guadarrama B; Toledo-Hernandez VH; Rodriguez-Lopez V; Valencia-Diaz S;
Address:		"Centro de Investigacion en Biodiversidad y Conservacion, Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos, Mexico. Centro de Investigaciones Quimicas, Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos, Mexico. Facultad de Farmacia. Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos, Mexico. Centro de Investigacion en Biotecnologia. Universidad Autonoma del Estado de Morelos., Cuernavaca, Morelos, Mexico"
Journal Title:		PLoS One
Year:		2015
Volume:		20151201
Issue:		12
Page Number:		e0143529 -
DOI:		10.1371/journal.pone.0143529
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"Herbivory activates the synthesis of allelochemicals that can mediate plant-plant interactions. There is an inverse relationship between the activity of xylophages and the abundance of epiphytes on Ipomoea murucoides. Xylophagy may modify the branch chemical constitution, which also affects the liberation of allelochemicals with defense and allelopathic properties. We evaluated the bark chemical content and the effect of extracts from branches subjected to treatments of exclusion, mechanical damage and the presence/absence of epiphytes, on the seed germination of the epiphyte Tillandsia recurvata. Principal component analysis showed that branches without any treatment separate from branches subjected to treatments; damaged and excluded branches had similar chemical content but we found no evidence to relate intentional damage with allelopathy; however 1-hexadecanol, a defense volatile compound correlated positively with principal component (PC) 1. The chemical constitution of branches subject to exclusion plus damage or plus epiphytes was similar among them. PC2 indicated that palmitic acid (allelopathic compound) and squalene, a triterpene that attracts herbivore enemies, correlated positively with the inhibition of seed germination of T. recurvata. Inhibition of seed germination of T. recurvata was mainly correlated with the increment of palmitic acid and this compound reached higher concentrations in excluded branches treatments. Then, it is likely that the allelopathic response of I. murucoides would increase to the damage (shade, load) that may be caused by a high load of epiphytes than to damage caused by the xylophages"
Keywords:		*Allelopathy Germination/drug effects Herbivory/*physiology Ipomoea/metabolism/*physiology Pheromones/biosynthesis/metabolism/pharmacology Seeds/drug effects/growth & development Symbiosis/drug effects;
Notes:		"MedlineFlores-Palacios, Alejandro Corona-Lopez, Angelica Maria Rios, Maria Yolanda Aguilar-Guadarrama, Berenice Toledo-Hernandez, Victor Hugo Rodriguez-Lopez, Veronica Valencia-Diaz, Susana eng Research Support, Non-U.S. Gov't 2015/12/02 PLoS One. 2015 Dec 1; 10(12):e0143529. doi: 10.1371/journal.pone.0143529. eCollection 2015"