title: Changes in DNA composition during cell differentiation in a green alga.
abstract: In the coenobia-forming green alga, Hydrodictyon reticulatum, changes in DNA composition during growth and differentiation of reproductive cells were followed. A "loss" of DNA per nucleus could be attributed to underreplication of an amplified DNA fraction being part of a (GC)-rich satellite band in CsCl gradients of DNA from young coenobia. This (GC)-rich satellite DNA contains up to 3 % unique DNA sequences intermingled with repetitive DNA. It does not (or nearly not) contain ribosomal DNA. A possible role of this DNA fraction in differentiation is suggested.
authors.affiliation: Pflanzenphysiologisches Institut, Universität Göttingen, Untere Karspüle 2, D-3400, Göttingen, FRG.
authors.forename: V
authors.initials: V
authors.lastname: Ssymank