Studies on Nucleolus and Nucleolar Chromosomes in Angiosperms

VI. Nucleolar organization in genus Tulipa L. (Liliaceae)

Abstract

In tulips secondary constrictions have been reported in very few species and these reports are highly controversial. Diploid, var. chrvsantha and tetraploid, var. stellata of Tulipa clusiana respectively have 8 and 11 NORs per complement which is confirmed by the formation of as many nucleoli in root tip nuclei. The disparity in the reports made so far is on account of the terminal position (in long arm) and minute size of the satellites. They can conveniently be revealed by Feulgen staining.