Springtime leaf development of mature sessile oak trees as based on multi-seasonal monitoring data

Viktor Oláh, Erzsébet Szollosi, Ágnes Lakatos, Péter Kanalas, Balázs Nyitrai, I. Mészáros

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Based on a four year leaf growth data-set we modelled the thermal time-dependent leaf ontogeny in upper and lower canopy layers of mature sessile oak trees, in a Quercetum petraeae-cerris forest stand (NE Hungary). Our regression models revealed no considerable differences between the timing of leaf unfolding and leaf expansion of different canopy layers. On the other hand seasonal course in leaf mass-to-area ratio (LMA) indicated that sun leaves needed considerably longer thermal time to fully develop their anatomical structures compared to shade leaves. LMA of sun leaves was higher during the whole leaf maturation process suggesting that 'sun' and 'shade' characteristics develop in very early stage of leaf ontogeny. Functioning of photosynthetic apparatus (Fv/Fo) in shade leaves have built up faster and performed better in all developmental stages which could be attributed to two main factors: 1) very early determination of leaf traits as a function of light environment and 2) evolving shading effect of upper canopy layer eliminates photoinhibition in lower leaves.

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalActa Silvatica et Lignaria Hungarica
Volume8
Issue number1
DOIs
Publication statusPublished - 2012

Fingerprint

leaf development
Quercus
monitoring
leaves
shade
canopy
monitoring data
oak
ontogeny
heat
photoinhibition
Hungary
forest stands
shading
developmental stage
maturation
developmental stages

Keywords

  • Chlorophyll fluorescence
  • Leaf morphology
  • Leaf ontogeny
  • Leaf traits
  • Light environment
  • Quercus petraea

ASJC Scopus subject areas

  • Forestry

Cite this

Springtime leaf development of mature sessile oak trees as based on multi-seasonal monitoring data. / Oláh, Viktor; Szollosi, Erzsébet; Lakatos, Ágnes; Kanalas, Péter; Nyitrai, Balázs; Mészáros, I.

In: Acta Silvatica et Lignaria Hungarica, Vol. 8, No. 1, 2012, p. 21-30.

Research output: Contribution to journalArticle

Oláh, Viktor ; Szollosi, Erzsébet ; Lakatos, Ágnes ; Kanalas, Péter ; Nyitrai, Balázs ; Mészáros, I. / Springtime leaf development of mature sessile oak trees as based on multi-seasonal monitoring data. In: Acta Silvatica et Lignaria Hungarica. 2012 ; Vol. 8, No. 1. pp. 21-30.
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