Abstract

In the glandular cells of the petiolary glands of Impatiens holstii, acid phosphatase is present in endoplasmic reticulum, Golgi apparatus, cytosomes, vacuoles, some nuclei and mitochondria. Only a few plasmalemma and cell walls are lightly marked except in the region of sieve tubes and “transfer cells” where there are heavy deposits of lead phosphate. We note two fundamental types of vacuoles: autophagic vacuoles which are heavily marked and others which have lead deposits only in their tonoplast.

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