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Air pollution by SO 2 amplifies the effects of water stress on enzymes and total soluble proteins of spruce needles
Author(s) -
Pierre Michèle,
Queiroz Orlando
Publication year - 1988
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1988.tb00619.x
Subject(s) - picea abies , phytotron , pollution , chemistry , glutamate synthase , phosphate , glutamine synthetase , horticulture , environmental chemistry , botany , biochemistry , biology , glutamine , ecology , amino acid
Measurements of soluble protein levels and catalytic capacity (maximum extractable activity) of isocitrate, glucose‐6‐phosphate and glutamate dehydrogenases were performed in needles of Picea abies L. Karst. under phytotron‐controlled conditions in filtered or SO 2 polluted (0.08 ppm, 3.1 μmol m −3 ) air. In watered plants, pollution had no significant effects, although sulphur accumulated in the needles. Water deprivation (1 or 2 weeks depending on the experiments) of non‐polluted plants decreased protein concentration and modified enzyme capacity, particularly for isocitrate and glucose‐6‐phosphate dehydrogenases. These effects were amplified in the polluted plants. Visible damage occurred only in plants subjected to both pollution and water stress. The results indicate that in spruce needles vulnerability of cell metabolism to the effects of a drought period is increased when water deprivation occurs under SO 2 pollution.