Effects of summer frost oh the gas exchange of field‐grownPinus sylvestrisL. seedlings
作者:
Tomas Lundmark,
Jan‐Erik Hällgren,
Christer Degermark,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1988)
卷期:
Volume 3,
issue 1-4
页码: 441-448
ISSN:0282-7581
年代: 1988
DOI:10.1080/02827588809382530
出版商: Taylor & Francis Group
关键词: Pinus sylvestris. photosynthesis;stomatal conductance;intercellular carbon dioxide concentration
数据来源: Taylor
摘要:
The effect of night temperatures on the gas exchange of naturally established Scots pine(Pinus sylvestrisL.) seedlings was investigated at a site with frequent summer frosts in northern Sweden. During the growing season, a reversible inhibition of light‐saturated rates of CO2‐assimilation was observed after nightfrosts. Stomatal conductance decreased or increased in parallel with changes in the CO2‐assimilation rate. The inhibition of photosynthesis was not primarily the result of stomatal closure, since intercellular CO2‐concentration increased after night frosts. Naturally regenerated Scots pine seedlings survived repeated frosts during the growing season and showed no visible damage although air temperatures as low as ‐8.2°C were recorded during the period of shoot elongation
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