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Effects of SO2 on the photosynthetic and respiration rates in scots pine seedlings.

Authors
  • Katainen, H S
  • Mäkinen, E
  • Jokinen, J
  • Karjalainen, R
  • Kellomäki, S
Type
Published Article
Journal
Environmental Pollution
Publisher
Elsevier
Publication Date
Jan 01, 1987
Volume
46
Issue
4
Pages
241–251
Identifiers
PMID: 15092722
Source
Medline
License
Unknown

Abstract

Exposure to moderate concentrations (90-500 microg SO(2) m(-3)) of SO(2) for 5-30 days caused a decrease in the photosynthetic rate. Only the lowest concentration (30 microg SO(2) m(-3)) increased photosynthesis. There was hardly any recovery in photosynthesis after the exposure. All exposure concentrations increased dark respiration. However, the lowest concentration had the smallest effect. Exposure to high concentration (2320 microg SO(2) m(-3)) of SO(2) for 5 h caused a strong decrease in the photosynthetic rate but there was a complete recovery within 2 weeks.

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