Chlorophyll fluorescence as an exploratory tool for ecophysiological studies on mosses and other small poikilohydric plants

Z. Tuba, Z. Csintalan, András Badacsonyi, Michael C F Proctor

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Photosynthetic pigment content (chlorophylls and carotenoids), slow chlorophyll fluorescence parameters (FM and FT at 690 and 735 nm) and net CO2 assimilation rate were measured in the moss Tortula ruralis (Hedw.) Gaertn. et al., and the lichens Cladonia convoluta (Lam.) P. Cout. and C. furcata (Huds.) Schrad. Chlorophylls, carotenoids and net CO2 assimilation (PN) were lower (on a dry-mass basis), and F690/F735 was higher, in all three cryptogams than average values reported for vascular plants. Within the moss shoots and lichens, chlorophylls, carotenoids, the fluorescence-decrease ratio (Rfd = [FM-FT]/FT) and net photosynthesis (PN) were higher, and F690/F735 was lower, in the apical/marginal, younger parts than in the basal, older ones. F690/F735 was inversely related to chlorophyll a+b, higher values indicating lower chlorophyll content. There was a good correlation between the Rfd and PN (measured at optimal water content) in the different parts of the moss and lichens, and in samples of T. ruralis which had been exposed for two months to different levels of atmospheric pollution in a transplant experiment, a correlation also found in published work on the same species in the course of desiccation-remoistening cycles. Chlorophyll fluorescence provides a non-invasive and relatively quick measure of overall photosynthetic function for ecophysiological studies, using either slow fluorescence kinetics (as here), or measurements from fast or modulated fluorometers.

Original languageEnglish
Pages (from-to)401-407
Number of pages7
JournalJournal of Bryology
Volume19
Issue number3
Publication statusPublished - 1997

Fingerprint

moss
mosses and liverworts
chlorophyll
fluorescence
carotenoid
lichen
photosynthesis
lichens
carotenoids
assimilation (physiology)
cryptogams
desiccation
vascular plant
Cladonia
pigment
chlorophyll a
desiccation (plant physiology)
atmospheric pollution
shoot
water content

Keywords

  • Bryophytes
  • Cladonia convoluta
  • Cladonia furcata
  • Desiccation
  • Gas exchange
  • Lichens
  • Pollution stress
  • Tortula ruralis

ASJC Scopus subject areas

  • Plant Science

Cite this

Chlorophyll fluorescence as an exploratory tool for ecophysiological studies on mosses and other small poikilohydric plants. / Tuba, Z.; Csintalan, Z.; Badacsonyi, András; Proctor, Michael C F.

In: Journal of Bryology, Vol. 19, No. 3, 1997, p. 401-407.

Research output: Contribution to journalArticle

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