BIOL 1030 Chapter Notes - Chapter 29-30: Larix Laricina, Mesozoic, Bryophyte

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Scott Kevin

Document Summary

Concept 29. 1 land plants evolved from green algae. Researchers have identified a lineage of green algae called charophyceans as the closest relatives of land plants. Many key characteristics of land plants also appear in a variety of algal clades. But red, brown, and some green algae also fit this description. So do green algae, dinoflagellates, and brown algae. Plants have chloroplasts with chlorophyll a and b. So do green algae, euglenids, and a few dinoflagellates. Land plants share four key features only with the charophyceans. The plasma membranes of land plants and charophyceans possess rosette cellulose- synthesizing complexes that synthesize the cellulose microfibrils of the cell wall. These complexes contrast with the linear arrays of cellulose-producing proteins in noncharophycean algae. Also, the cell walls of plants and charophyceans contain a higher percentage of cellulose than the cell walls of noncharophycean algae.