Archaeplastida

The group Archaeplastida (or green Line according to Guyader and Lecointre) gathers living beings capable of Photosynthèse, as what one can call the red algas and the green plants…

The group is since many characteristics are shared by the whole of the members of this Taxon. , as well with regard to the nuclear material as chloroplastic or mitochondrial.

The group would not be monophyletic according to other studies of phylogenetic: according to Van de Peer & De Wachter (1997), Nozaki and Al (2003, 2005), Yoon and Al (2004), the Rhodophyta are not the group-brother of the house plants, and would be at the base of vast a taxon including/understanding groups previously attached to the protists as well as the Straménopiles.

Here an outline of the characters shared by the members of Archaeplastida :

Presence of Chloroplast (S) . They are the descendants of the organization which carried out the chloroplastic first endosymbiose. Others endosymbioses occurred thereafter, but the host retained a photosynthetic endosymbiote then Eucaryote, as it was the case for the members of the brown Lignée…
This chloroplast presents a fine wall consisted of Peptidoglycane and is contained in a particular Vacuole. That would result from the ancestral integration of a Cyanobactérie as a chloroplast.
the Thylakoïde S (or thylacoïdes ) are originally separated in an equidistant way between them.
Of the Pigment S accessories is contained in Phycobilisome S attached to the thylakoïdes.
the chloroplasts contain Chlorophylle has .
the Glucide S are stored outside the chloroplast in the form of Amidon.
the chloroplastic DNA is located at the center of the Organite . It is circular.
the DNA chloroplastic presents two repetitions opposite containing ribosomal ARN .
the two sub-units of the RuBisCo (Ribulose 1,5-bisphosphate) are coded by the DNA chloroplastic.
the whipped cells are always biflagellées (the absence of whips is regarded as a secondary loss).
both whip of a cell are always isochontes (of identical structure, even if they are different sizes).
whip Them present two filamentous lines of expansion .
a spangled structure mark the transition between whips and the basal Corps.

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