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Pigment Concentrations and Ratios of Aleppo Pine Seedlings Exposed to Ozone

Authors
  • Manninen, S.1
  • Le Thiec, D.2
  • Rose, C.2
  • Nourrisson, G.2
  • Radnai, F.2
  • Garrec, J.P.2
  • Huttunen, S.1
  • 1 University of Oulu, Department of Biology, Oulu, 90401, Finland , Oulu
  • 2 INRA-Centre de Recherches Forestières, Unité d'Ecophysiologie Forestière-Equipe de Pollution Atmosphérique, Champenoux, 54280, France , Champenoux
Type
Published Article
Journal
Water Air & Soil Pollution
Publisher
Springer-Verlag
Publication Date
Nov 01, 1999
Volume
116
Issue
1-2
Pages
333–338
Identifiers
DOI: 10.1023/A:1005233025368
Source
Springer Nature
Keywords
License
Yellow

Abstract

Two-year-old Aleppo pine (Pinus halepensis Mill.) seedlings were exposed to ambient air+50 ppb O3 in open-top chambers (24 hours/day, 7 days/week) during May-October 1997 and to ambient air+70 ppb O3 from May 1998 onwards. One growing season fumigation with ozone did not affect the pigment concentrations of the current-year (c) needles, nor were there any differences in photosynthesis or stomatal conductance. In May 1998, however, a marked carry-over effect was seen in the chlorophyll a and b and total carotenoid concentrations of the O3-fumigated one-year-old (c+1) needles. The chlorophyll a and b and total carotenoid concentrations of newly flushed needles of the O3-fumigated seedlings also seemed to be slightly decreased, as was their net photosynthesis when compared to the values of the filtered-air control needles. The chlorotic mottle and the changes in chloroplast pigments and photosynthesis of the c and/or c+1 needles of the NFA+O33 seedlings in May 1998 indicate that frequent episodes of ozone concentrations of ≥100 ppb, especially when they also occur during the evening and night hours, as in some areas in southern Europe, may result in visible needle damage on Aleppo pine.

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