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Cross-reactivity of birch anthers and leaves with birch pollen antigens and allergens. A fine-structural immunocytochemical study using the post-embedding protein-A-gold technique

M Grote and HG Fromme

Ultra-thin sections of vegetative tissues from birch (anthers and leaves) were labeled for pollen antigens and allergens using a commercial rabbit IgG antibody preparation directed against birch pollen antigens and allergens. Antibody binding sites were visualized using the protein A-gold technique. Specific labeling occurred in anther tissue (tape-tum cells, anther wall cells) as well as in the birch leaf (assimilation parenchyma). In both types of tissue, antigens and allergens were detected throughout the living protoplast (including cell organelles such as nuclei, mitochondria, and plastids). The cellulose cell walls were always free from anti-birch-pollen IgG- binding sites. The immunological controls (normal rabbit IgG) showed a low degree of nonspecific labeling. In plant tissues belonging to genera quite different from birch (tulip anther, rhododendron leaves), after incubation with the specific IgG weak labeling was observed. The immunological basis for these results is discussed.

Volume 34, Issue 11, pp. 1459-1464, 11/01/1986
Copyright © 1986 by The Histochemical Society


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