Variations in leaf pigment content and photosynthetic activity of Phragmites australis in healthy and die-back reed stands of Lake Fertö/Neusiedlersee

I. Mészáros, Szilvia Veres, Mária Dinka, G. Lakatos

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The photosynthetic capacity of the common reed (Phragmites australis /Cav./ Trin. ex Steudel) was studied in various reed stands in the littoral zone of Lake Fertõ. Measurements were performed in three healthy and two die-back reed stands in the summer of 1997. In the leaves of declining reeds, the chlorophyll content was lower than in the vigorous sites. In the former sites, there was a significant rise in the total carotenoid pool (320 - 480 mmol mol-1 ch1 (a + b)) as compared to that of the vigorous sites (250- 350 mmol mol-1 ch1 (a + b). The size of the xanthophyll cycle pool and the β-carotene content of leaves significantly increased in the die-back sites. In early summer, the potential photochemical quantum efficiency of Photosystem II (Fv/Fm) did not differ considerably (0.79-0.81) from site to site, yet by August it significantly decreased (0.74-0.77) in the die-back sites as compared to the vigorous sites. The maximum CO2 assimilation rate measured on the 3rd and 4th leaves ranged from 11 to 17 CO2μmol m-2 s-1 and from 9 to 12 CO 2μmol m-2 s-1 in the vigorous sites and the die-back sites, respectively. The stomatal conductance was also lower in the die-back sites (200-350 mmol H2O m-2 s-1) than in the vigorous reed stands (380-510 mmol H2O m-2s -1) which might result in the functional impairment of the gas ventilation system of the declining reeds, and consequently in oxygen deficiency and damage to the rhizome.

Original languageEnglish
Pages (from-to)681-686
Number of pages6
JournalHydrobiologia
Volume506-509
Publication statusPublished - Nov 15 2003

Fingerprint

Phragmites australis
dieback
pigment
pigments
lakes
lake
leaves
summer
rhizome
stomatal conductance
carotenoid
ventilation systems
intertidal environment
ventilation
littoral zone
carotenes
chlorophyll
lutein
photosystem II
rhizomes

Keywords

  • Chlorophyll fluorescence
  • Lake Fertõ
  • Photosynthesis
  • Phragmites australis
  • Reed decline
  • Shallow lakes

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Variations in leaf pigment content and photosynthetic activity of Phragmites australis in healthy and die-back reed stands of Lake Fertö/Neusiedlersee. / Mészáros, I.; Veres, Szilvia; Dinka, Mária; Lakatos, G.

In: Hydrobiologia, Vol. 506-509, 15.11.2003, p. 681-686.

Research output: Contribution to journalArticle

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abstract = "The photosynthetic capacity of the common reed (Phragmites australis /Cav./ Trin. ex Steudel) was studied in various reed stands in the littoral zone of Lake Fert{\~o}. Measurements were performed in three healthy and two die-back reed stands in the summer of 1997. In the leaves of declining reeds, the chlorophyll content was lower than in the vigorous sites. In the former sites, there was a significant rise in the total carotenoid pool (320 - 480 mmol mol-1 ch1 (a + b)) as compared to that of the vigorous sites (250- 350 mmol mol-1 ch1 (a + b). The size of the xanthophyll cycle pool and the β-carotene content of leaves significantly increased in the die-back sites. In early summer, the potential photochemical quantum efficiency of Photosystem II (Fv/Fm) did not differ considerably (0.79-0.81) from site to site, yet by August it significantly decreased (0.74-0.77) in the die-back sites as compared to the vigorous sites. The maximum CO2 assimilation rate measured on the 3rd and 4th leaves ranged from 11 to 17 CO2μmol m-2 s-1 and from 9 to 12 CO 2μmol m-2 s-1 in the vigorous sites and the die-back sites, respectively. The stomatal conductance was also lower in the die-back sites (200-350 mmol H2O m-2 s-1) than in the vigorous reed stands (380-510 mmol H2O m-2s -1) which might result in the functional impairment of the gas ventilation system of the declining reeds, and consequently in oxygen deficiency and damage to the rhizome.",
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AB - The photosynthetic capacity of the common reed (Phragmites australis /Cav./ Trin. ex Steudel) was studied in various reed stands in the littoral zone of Lake Fertõ. Measurements were performed in three healthy and two die-back reed stands in the summer of 1997. In the leaves of declining reeds, the chlorophyll content was lower than in the vigorous sites. In the former sites, there was a significant rise in the total carotenoid pool (320 - 480 mmol mol-1 ch1 (a + b)) as compared to that of the vigorous sites (250- 350 mmol mol-1 ch1 (a + b). The size of the xanthophyll cycle pool and the β-carotene content of leaves significantly increased in the die-back sites. In early summer, the potential photochemical quantum efficiency of Photosystem II (Fv/Fm) did not differ considerably (0.79-0.81) from site to site, yet by August it significantly decreased (0.74-0.77) in the die-back sites as compared to the vigorous sites. The maximum CO2 assimilation rate measured on the 3rd and 4th leaves ranged from 11 to 17 CO2μmol m-2 s-1 and from 9 to 12 CO 2μmol m-2 s-1 in the vigorous sites and the die-back sites, respectively. The stomatal conductance was also lower in the die-back sites (200-350 mmol H2O m-2 s-1) than in the vigorous reed stands (380-510 mmol H2O m-2s -1) which might result in the functional impairment of the gas ventilation system of the declining reeds, and consequently in oxygen deficiency and damage to the rhizome.

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