IN SITU DISTRIBUTION AND CONFIGURATION OF rDNA IN THE NUCLEOLUS OF PISUM SATIVUM
LONG Hong SUN Hai Jing ZENG Xian Lu JIAO Ming Da HAO Shui (College of Life Sciences , Nankai University, Tianjin 300071; Institute of Genetics and Ceil Biology, Changchun 130024)
Distribution and configuration of nucleolar DNA in the nucleolus of pea ( Pisum sativum) were analyzed using cytochemical NAMA-Ur DNA specific stain method. The results showed that nucleolar DNA distributed in FC and juncture of FC/DFC in the forms of surrounding FC. rDNA in different positions existed in either condensed or uncondensed forms. Nucleolus-associal-ed chromatin outside nucleolus extended in the periphery of FC via channels in the nucleolus.