Effects of supplemental UV-B radiation on the photosynthesis — physiological properties and flavonoid content of beech seedlings (Fagus sylvatica L.) in outdoor conditions

Láposi, Réka: Effects of supplemental UV-B radiation on the photosynthesis — physiological properties and flavonoid content of beech seedlings (Fagus sylvatica L.) in outdoor conditions. Acta biologica Szegediensis, (49) 1-2. pp. 151-153. (2005)

[img] Cikk, tanulmány, mű
49151.pdf

Download (69kB)

Abstract

Responses of beech seedlings to supplemental UV-B radiation were investigated during three consecutive seasons, in three repeated experiments. Our attention was paid on the alteration of the photosynthetic pigment composition - especially on the xanthophyll cycle pigments - chlorophyll fluorescence parameters, furthermore the accumulation of UV-B absorbing compounds in leaves, the specific leaf mass and leaf water content. The enhanced UV-B radiation generally affected significantly neither photochemical efficiency of PSII, nor photosynthetic pigment composition. UV-B radiation induced some protective mechanisms, thus VAZ-pool increased in beech leaves in every experiment, parallel with the enhancement of non-photochemical quenching. Amount of UV-B absorbing compounds in leaves increased under enhanced UV-B, but no significant changes were observed in the specific leaf mass. Sensitivity of plants to UV-B is largely influenced by other environmental factors and experimental conditions.

Item Type: Article
Event Title: Hungarian Congress on Plant Physiology, 8., 2005, Szeged, Hungarian Conference on Photosynthesis, 6., 2005, Szeged
Journal or Publication Title: Acta biologica Szegediensis
Date: 2005
Volume: 49
Number: 1-2
Page Range: pp. 151-153
ISSN: 1588-385X
Language: angol
Heading title: Ecophysiology; Proceedings
Uncontrolled Keywords: Természettudomány, Biológia
Additional Information: Bibliogr.: 153. p.; Abstract
Date Deposited: 2016. Oct. 17. 09:24
Last Modified: 2018. May. 28. 09:51
URI: http://acta.bibl.u-szeged.hu/id/eprint/22710

Actions (login required)

View Item View Item