The group of the métabiontes ( Metabionta ) consists of organizations Autotrophe S, carrying out the Photosynthèse. Coarsely, one can say that they are the Algue S reds (Rhodobionte S) and the plants green (Chlorobionte S). The métabiontes can be pluricellular, and even of big size (the Arbre S…). Here an outline of the characters specific to the métabiontes :

• the wall of peptido-glycanes of the Chloroplaste is absent. It is still present at the brother group of the Glaucophyte S. This absence is thus a secondary loss. The Chloroplaste thus has a double membrane: the membrane interns which would result from the Cyanobactérie at the origin of the endosymbiose, and the external membrane coming from the Vacuole of Endocytose of the cell host.
• the Molécule S circulars of DNA chloroplastic are concentrated in many nucleoids distributed everywhere in the chloroplast.
• There is possibility of organization pluricellular .
• the Gène of elongation EF-2 carries derived characters specific to the métabiontes .

Classification

According to Luc Brouillet (2004) the group of the métabiontes includes/understands tax them suivants :

• Rhodobionte S ( Rhodophyta )
• Chlorobionte S strictly speaking or plants true ( Viridiplantae )
• Micromonadophyte S ( Micromonadophyta )
• Ulvophyte S ( Ulvophyta )
• Chlorophycée S ( Chlorophyceae )
• Ulvophycée S ( Ulvophyceae )
• Pleurastrophycée S ( Pleurastrophyceae )
• Streptophyte S strictly speaking ( Streptophytina )
• Chlorokybophyte S ( Chlorokybophyta )
• Klebsormidiophyte S ( Klebsormidiophyta )
• Phragmoplastophyte S ( Phragmoplastophyta )
• Zygnématophyte S ( Zygnaematophyta )
• Plasmodesmophyte S ( Plasmodesmophyta )
• Chétosphéridiophyte S ( Chaetosphaeridiophyta )
• Coléochaetophyte S ( Colaeochaetophyta )
• Charophyte S ( Charophyta )
• Embryophyte S ( Embryophyta )  : the major part of the species Végétal be ( Plantae ) terrestrial

Phylogenetic tree

┌───────────────────────────────────────────────────────── Glaucophytes green Line ┌─────────────────────────────────────────── Rhodobiontes └─ Métabiontes ─┤ ┌───────────────────────────────── Micromonadophytes └─ Chlorobiontes ┌──────────────────── Chlorophycées ├─ Ulvophyte s─┼──────────────────── Ulvophycées │ └──────────────────── Pleurastrophycées │ ┌───────────────── Chlorokybophytes └─ Streptophyte s─┼───────────────── Klebsormidiophytes │ ┌─────────── Zygnématophytes └─ Phragmoplastophytes └─ Plasmodesmophytes ├───── Chaetosphaeridiophytes ├───── Coléochaetophytes ├───── Charophytes └───── Embryophytes

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