Abstract
Carbonic anhydrase activity in selected leaves was examined in relation to zinc supply toEucalyptus maculata seedlings andTrifolium subterraneum grown in the glasshouse on a zinc-deficient sand.
In both species, carbonic anhydrase activity was closely related to the zinc supply and fell to 0 in severely-deficient plants. Enzyme activity increased linearly as a function of the leaf zinc concentration. InE. maculata plants supplied with adequate zinc, carbonic anhydrase levels were only 3% of those inT. subterraneum.
It is concluded that foliar zinc analysis is more sensitive than the carbonic anhydrase assay for determining the zinc status ofE. maculata seedlings. Critical zinc concentration for young fully-expandedE. maculata leaves was between 9 and 10 μg g−1 dry matter.
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Dell, B., Wilson, S.A. Zinc nutrition and leaf carbonic anhydrase activity ofEucalyptus maculata seedlings andTrifolium subterraneum . Plant Soil 113, 287–290 (1989). https://doi.org/10.1007/BF02280195
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DOI: https://doi.org/10.1007/BF02280195