Leaf hairs of Olea europeae protect underlying tissues against ultraviolet-B radiation damage

dc.contributor.author	Karabourniotis, G	en
dc.contributor.author	Kyparissis, A	en
dc.contributor.author	Manetas, Y	en
dc.date.accessioned	2014-06-06T06:42:29Z
dc.date.available	2014-06-06T06:42:29Z
dc.date.issued	1993	en
dc.identifier.issn	00988472	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/651
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-38248998972&partnerID=40&md5=e6d4716fe72555fe0de9b1a7f3e8d6dc	en
dc.subject	Chlorophyll fluorescence	en
dc.subject	leaf hairs	en
dc.subject	Olea europaea	en
dc.subject	UV-B radiation	en
dc.title	Leaf hairs of Olea europeae protect underlying tissues against ultraviolet-B radiation damage	en
heal.type	journalArticle	en
heal.publicationDate	1993	en
heal.abstract	The photochemical efficiency of photosystem II, as measured by chlorophyll fluorescence induction, was not affected in de-haired olive leaves kept in the dark or intact leaves irradiated with a moderate (3.75 W m-2) ultraviolet-B (UV-B) intensity. In de-haired, UV-B-irradiated leaves, however, the ratio of variable to maximum (Fv/Fm) chlorophyll fluorescence declined significantly and irreversibly. Reduction in Fv/Fm was associated with an increase in instantaneous (F0) and a decrease in maximum (Fm) fluorescence, indicating perturbation by the UV-B exposure of more than one photosynthetic site. Extensive epidermal browning in dehaired, UV-B irradiated leaves was also observed, indicating possible damage to cell membranes. The results strengthen the hypothesis that leaf hairs protect the underlying tissues against UV-B radiation damage. © 1993.	en
heal.journalName	Environmental and Experimental Botany	en
dc.identifier.issue	3	en
dc.identifier.volume	33	en
dc.identifier.spage	341	en
dc.identifier.epage	345	en