Studies on the salivary gland of Drosophila: II. Changes in nuclear and nucleolar volumes and their possible significance

An analysis of the nuclear and nucleolar volumes suggests: 1) There is a close correlation between cytoplasmic basophilia and nucleolar size, 2) the nucleolus and the RNA system is directly concerned with secretion and 3) there appears to be an equally direct connection between nuclear size and the degree of chromosome polyteny.