ULTRAVIOLET-B RADIATION ABSORBING CAPACITY OF LEAF HAIRS

dc.contributor.author	KARABOURNIOTIS, G	en
dc.contributor.author	PAPADOPOULOS, K	en
dc.contributor.author	PAPAMARKOU, M	en
dc.contributor.author	MANETAS, Y	en
dc.date.accessioned	2014-06-06T06:42:18Z
dc.date.available	2014-06-06T06:42:18Z
dc.date.issued	1992	en
dc.identifier.issn	0031-9317	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/555
dc.subject	FLAVONOIDS	en
dc.subject	LEAF HAIRS	en
dc.subject	OPTICAL PROPERTIES	en
dc.subject	ULTRAVIOLET RADIATION	en
dc.subject.classification	Plant Sciences	en
dc.subject.other	HIGHER-PLANTS	en
dc.subject.other	EXCHANGE	en
dc.title	ULTRAVIOLET-B RADIATION ABSORBING CAPACITY OF LEAF HAIRS	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1992	en
heal.abstract	Pubescence layers with their native structure and orientation were isolated from the leaves of Olea europaea L. and Olea chrysophylla L. They were almost transparent in the visible, but considerable absorptance was evident in the ultraviolet-B region (UV-B), with maximum at 310 nm. Methanolic extracts of hairs from Olea and a variety of other pubescent species consistently showed the existence of UV-screening pigments. Absorptance of trichomes varied, but a trend towards more effective UV-B radiation attenuation in the sub-alpine Verbascum species may be claimed. In all cases, pigments were located within hair cells and in Olea they were characterized as phenolics with considerable flavonoid contribution. It is suggested that leaf hairs. besides other functions, may constitute a shield against UV-B radiation.	en
heal.publisher	MUNKSGAARD INT PUBL LTD	en
heal.journalName	PHYSIOLOGIA PLANTARUM	en
dc.identifier.issue	3	en
dc.identifier.volume	86	en
dc.identifier.isi	ISI:A1992KA47900010	en
dc.identifier.spage	414	en
dc.identifier.epage	418	en