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Independent photosynthetic response of exposed and unexposed twigs of the same spruce tree to car exhaust
Author(s) -
ZieglerJöns A.,
Kammerbauer H.,
Drenkard S.,
Hock B.,
Knoppik D.
Publication year - 1990
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1990.tb01150.x
Subject(s) - transpiration , photosynthesis , botany , chlorophyll fluorescence , horticulture , picea abies , environmental science , chemistry , biology
In the present paper, we address the question whether the injuries of acute toxic concentrations of exhaust emissions are due to systemic effects or are rather the result of localized and direct effects upon the needles. Twigs from exposed spruce trees, which had been prevented from contact with the exhaust emissions, did not show any decrease of photosynthetic or transpiration rates within four weeks. Chlorophyll fluorescence was also not affected in these parts, while it was severely impaired in the exposed twigs.