Taxonomy. The consensus in 2005, when the group consisting of the glaucophytes and red and green algae and land plants was named ‘Archaeplastida’, was that it was a clade, i.e. was monophyletic. To distinguish, the larger group is sometimes known as Plantae sensu lato (“plants in the broad sense”).
What clade is red algae in?
Rhodoplantae
The Rhodoplantae (Clade 1) are the red algae in a broad sense plus the Glaucophytes. They range in form from unicells to complex filaments and thalloid plants.
What are examples of Archaeplastida?
Glaucophyte
Green algaeRed algaeRhodophytae
Archaeplastida/Lower classifications
What groups are included in the Super clade Viridiplantae?
The Viridiplantae are comprised of two clades—the Chlorophyta and the Streptophyta.
Are Archaeplastida heterotrophic or autotrophic?
Molecular evidence supports the hypothesis that all Archaeplastida are descendents of an endosymbiotic relationship between a heterotrophic protist and a cyanobacterium. The protist members of the group include the red algae and green algae.
Are Archaeplastida Colonial?
Volvox aureus is a green alga in the supergroup Archaeplastida. This species exists as a colony, consisting of cells immersed in a gel-like matrix and intertwined with each other via hair-like cytoplasmic extensions. True multicellular organisms, such as the sea lettuce, Ulva, are represented among the chlorophytes.
Why is red algae an Archaeplastida?
Kingdom Archaeplastida is a taxonomic group comprised of land plants, green algae, red algae, and glaucophytes. One of the fundamental and distinctive features of the members of Archaeplastida is the presence of the chloroplasts. They also lack centrioles and have mitochondria. They also have a cell wall and cellulose.
Where are Archaeplastida found?
Red algae are common in tropical waters where they have been detected at depths of 260 meters. Other red algae exist in terrestrial or freshwater environments. The red algae life cycle is an unusual alternation of generations that includes two sporophyte phases, with meiosis occurring only in the second sporophyte.
What are the five supergroups of eukaryotes?
One current classification separates all eukaryotes into five supergroups: Excavata, Chromalveolata, Rhizaria, Archaeplastida and Unikonta. Along with different groups of protists, animals and fungi are placed into the supergroup unikonta and plants are found in archaeplastida.
Is Archaeplastida a kingdom?
Plant
Archaeplastida/Kingdom
Is Archaeplastida alternation of generations?
Alternation of generations (also known as metagenesis or heterogenesis) is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.
Is brown algae an Archaeplastida?
Brown algae have chloroplasts that also contain chlorophyll c and certain yellowish pigments (carotenes and xanthophylls) not found in any Archaeplastida, leading to the hypothesis that these chloroplasts were captured independently.
What is the scientific name for Archaeplastida?
Archaeplastida. The Archaeplastida (or kingdom Plantae sensu lato) are a major group of eukaryotes, comprising the red algae (Rhodophyta), the green algae, and the land plants, together with a small group of freshwater unicellular algae called glaucophytes. The chloroplasts of all these organisms are surrounded by two membranes,…
Why do Archaeplastida form a monophyletic group?
There is usually a cell wall including cellulose, and food is stored in the form of starch. However, these characters are also shared with other eukaryotes. The main evidence the Archaeplastida form a monophyletic group comes from genetic studies, which indicate that plastids probably had a single origin.
How did the archaeplastid acquire its chloroplasts?
Because the ancestral archaeplastid is hypothesized to have acquired its chloroplasts directly by engulfing cyanobacteria, the event is known as a primary endosymbiosis. Evidence for this includes the presence of a double membrane around the chloroplasts; one membrane belonged to the bacterium, and the other to the eukaryote that captured it.
