INTERPHASE NUCLEAR-STRUCTURE AND HETEROCHROMATIN IN 6 SPECIES OF CROTALARIA

Interphase nuclear organization and heterochromatin were studied in si x species of Crotalaria. All the species showed chromocentric nuclear organization instead of reticulate organization. The number of chromoc entres and treatment duration with acid or alkali were found to be spe cies specific. Percentage heterochromation values determined by two di fferent techniques were somewhat high in meristematic cells than those in differentiated cells. On the basis of heterochromatin values in bo th meristematic and differentiated cells, C. alata may be considered a s primitive of the six Crotalaria species.