The Xanthophyta or Heterokontae are commonly known as yellow-green algae include only one class Xanthophyceae. This division has close relationship with the Ghlorophyta comprising both marine and fresh-water forms. Certain species grow on drying mud, on trunk of trees, on damp walls, and similar other habitat. There are varied forms of vegetative body ranging from unicellular coccoid, siphonaceous to filamentous [...]
The following points highlight the three families under which volvocales has been classified. The families are:- 1. Chlamtdomonadaceae 2. Sphaerellaceae 3. Volvocaceae. Family # 1. Chlamtdomonadaceae: This family includes algae possessing unicellular biflagellate vegetative cells. Asexual reproduction is by zoospores and hypnospores and sexual reproduction ranges from—isogamy, anisogamy to simple and advanced oogamy. Genus Chlamydomonas: The genus Chlamydomonas represents one [...]
In this article we will discuss about the classification of ulvales. Family Ulvaceae: Plants are usually tubular or parenchymatous thalloid, capillary to broad, occasionally reduced to one or two rows of cells; attached or becoming free-floating; one or two cells in thickness. Cells possess one or two large lateral chromatophores with pyrenoids and single nucleus. Sexual and asexual plants are [...]