Photosynthesis-ecophysiological properties of beech (Fagus sylvatica L.) under the exclusion of ambient UV-B radiation

R. Láposi, Sz Veres, O. Mile, I. Mészáros

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The effects of exclusion of UV-B radiation on leaf physiology of beech seedlings regenerating in a deforested area were studied in field. Under UV-B exclusion the chlorophyll content of leaves was higher, the chlorophyll a/b ratio and the carotenoid content was lower than in leaves under the ambient level of UV-B radiation. In leaves developed under the exclusion of UV-B a smaller degree of conversion of violaxantin to zeaxantin and atheraxantin was found at noon. The results showed that the ambient level of UV-B radiation decreased the maximum photochemical efficiency (Fv/Fm) of the dark-adapted leaves, especially at noon. Beech leaves contained significantly higher quantities of UV-B absorbing compounds on the basis of leaf area at the ambient UV-B than under the UV-B exclusion. Flavonoid accumulation took place in close correlation with the increase of specific leaf weight as compared to the leaves developed under UV-B exclusion.

Original languageEnglish
Pages (from-to)243-245
Number of pages3
JournalActa Biologica Szegediensis
Volume46
Issue number3-4
Publication statusPublished - 2002

Fingerprint

Fagus
Photosynthesis
Fagus sylvatica
photosynthesis
Radiation
leaves
Physiology
Carotenoids
Chlorophyll
Seedlings
Flavonoids
chlorophyll
Weights and Measures
carotenoids
flavonoids
leaf area
physiology
seedlings

Keywords

  • Beech
  • Fagus sylvatica
  • Photochemical efficiency
  • UV-B radiation
  • Xanthophyll cycle

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Cell Biology
  • Applied Microbiology and Biotechnology
  • Neuroscience(all)

Cite this

Photosynthesis-ecophysiological properties of beech (Fagus sylvatica L.) under the exclusion of ambient UV-B radiation. / Láposi, R.; Veres, Sz; Mile, O.; Mészáros, I.

In: Acta Biologica Szegediensis, Vol. 46, No. 3-4, 2002, p. 243-245.

Research output: Contribution to journalArticle

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