BACKGROUND AND AIMS Consensus higher-level molecular phylogenies present a compelling case that an ancient divergence separates eukaryotic green algae into two major monophyletic lineages, Chlorophyta and Streptophyta, and a residuum of green algae, which have been referred to prasinophytes or micromonadophytes. Nuclear DNA content estimates have been published for less than 1% of the described...

As a means to understand the emergence of individuality at a new higher level, a model about the transition from undifferentiated cell-groups to multicellular organisms with germ-soma separation is developed. We argue that the increase in complexity is a consequence of the trade-offs between the two basic fitness components –fecundity and viability– as size increases. We use volvocalean green a...

The phylum Streptophyta comprises all land plants and six monophyletic groups of charophycean green algae (Mesostigmatales, Chlorokybales, Klebsormidiales, Zygnematales, Coleochaetales, and Charales). Phylogenetic analyses of four genes encoded in three cellular compartments suggest that the Charales are sister to land plants and that charophycean green algae evolved progressively toward an inc...

The extracts from 30 species of the green algae were examined for hemagglutination activity with a variety different animal and human erythrocytes which untreated treated enzymes. Almost all showed at least toward one type tested. Strong was detected in 5 Chlorophyta (Anadyomene plicata, Avrainvillea erecta, Boodlea struveoides, Halimeda velasquezii discoidea) enzyme-treated rabbit sheep erythr...