Erinea formation on Quercus ilex leaves: Anatomical, physiological and chemical responses of leaf trichomes against mite attack

dc.contributor.author	Karioti, A	en
dc.contributor.author	Tooulakou, G	en
dc.contributor.author	Bilia, AR	en
dc.contributor.author	Psaras, GK	en
dc.contributor.author	Karabourniotis, G	en
dc.contributor.author	Skaltsa, H	en
dc.date.accessioned	2014-06-06T06:51:18Z
dc.date.available	2014-06-06T06:51:18Z
dc.date.issued	2011	en
dc.identifier.issn	00319422	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.phytochem.2010.11.005	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5444
dc.subject	Fagaceae	en
dc.subject	Leaf trichomes	en
dc.subject	Mites	en
dc.subject	Phenolics	en
dc.subject	Quercus ilex	en
dc.subject.other	anthocyanin	en
dc.subject.other	catechin	en
dc.subject.other	flavonoid	en
dc.subject.other	proanthocyanidin B3	en
dc.subject.other	quercetin 3' o glucoside	en
dc.subject.other	quercetin 3'-O-glucoside	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	chemical structure	en
dc.subject.other	chemistry	en
dc.subject.other	feeding behavior	en
dc.subject.other	metabolism	en
dc.subject.other	mite	en
dc.subject.other	oak	en
dc.subject.other	physiology	en
dc.subject.other	plant leaf	en
dc.subject.other	Animals	en
dc.subject.other	Anthocyanins	en
dc.subject.other	Catechin	en
dc.subject.other	Feeding Behavior	en
dc.subject.other	Flavonoids	en
dc.subject.other	Mites	en
dc.subject.other	Molecular Structure	en
dc.subject.other	Plant Leaves	en
dc.subject.other	Quercus	en
dc.subject.other	Acari	en
dc.subject.other	Aceria	en
dc.subject.other	Eriophyoidea	en
dc.subject.other	Fagaceae	en
dc.subject.other	Ilex	en
dc.subject.other	Quercus ilex	en
dc.title	Erinea formation on Quercus ilex leaves: Anatomical, physiological and chemical responses of leaf trichomes against mite attack	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.phytochem.2010.11.005	en
heal.publicationDate	2011	en
heal.abstract	Structures on the surfaces of leaves, such as dense layers of non-glandular trichomes, strongly affect phylloplane mite activities. On the other hand the feeding of eriophyoid mites on leaf surfaces can cause hyperplasia of leaf trichomes (erinea formation). In many cases the hyperplasia is accompanied by the accumulation of pigments within trichome cells, causing an impressive red-brown colouration of the erineum. There is no information, however, on the structure of these pigments as well as on the chemical alterations in the phenolic content of plant trichomes in response to mite attack. Erinea formation on the abaxial surface of Quercus ilex leaves upon Aceria ilicis (Acari: Eriophyoidea) attack provides an excellent model on this topic. Differences in the structure and chemical composition of isolated trichomes derived either from healthy (normal trichomes) or mite attacked (hypertrophic trichomes) leaves were examined. Carbon investment was comparable between the two different trichome types, but the cell walls of the hypertrophic trichomes appeared thinner and did not contain microcrystalline cellulose. Observations under the fluorescence microscope showed that the emitted fluorescence was different between the two trichome types, indicating a different composition in fluorescencing phenolic compounds. The chemical analyses confirmed that hypertrophic trichomes contained higher concentrations of the feeding deterrents proanthocyanidin B3 and catechin, as well as of quercetin-3-O-glucoside, but lower concentrations of acylated flavonoid glycosides, than the normal ones. The results showed that the structural and functional changes in leaf trichomes upon mite attack may be an effort of the leaf to compensate the damage caused by the pest. © 2010 Elsevier Ltd. All rights reserved.	en
heal.journalName	Phytochemistry	en
dc.identifier.issue	2-3	en
dc.identifier.volume	72	en
dc.identifier.doi	10.1016/j.phytochem.2010.11.005	en
dc.identifier.spage	230	en
dc.identifier.epage	237	en