X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/chloroplast13.git/blobdiff_plain/66d1141218f190b9d6a8997af7d8ef784db3208e..9771923779498f5cbf4e21e9389062ac5d5cbb11:/discussion.tex

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@@ -1,3 +1,9 @@
+The first endiosymbiosis ended in a great diversification of 
+a lineage comprising \textit{Red Algae, Green Algae} and \textit{Land Plants} (terrestrial).
+Several Second Enbiosymbioses occurred then: two involving a Red 
+Algae and other heterotrophic eucaryotes and giving birth to both Brown 
+Algae and Dinoflagellates lineages; another involving a Green Algae and 
+a heterotrophic eucaryot and giving birth to Euglens.\\
 The interesting with the tree produced (especially from DOGMA) is 
 that organisms resulting from the first endosymbiosis are distributed in 
 every of the lineage found in the chloroplast genome structure 
@@ -13,22 +19,25 @@ theories of chloroplasts (and so photosynthetic ability) origins in
 different Eucaryotic lineages.
 Interestingly, The sole organisms included that possesses a 
 chloroplast (and so a chloroplastic genome) but that have lost the 
-photosynthetic ability (being parasitic plant) are found at the base of 
+photosynthetic ability (being parasitic plants) are found at the base of 
 the tree, and not together with its related species phylogenetically, 
 meaning that functional chloroplast genes are evolutionnary constrained 
 when used in photosynthetic process, but loose rapidly their efficiency 
 when not used. They are Cuscuta-grovonii an Angiosperm (flowering plant) 
 at the base of the DOGMA Angiosperm-Conifers branch, and 
 Epipactis-virginiana also an Angiosperm at the complete base of the tree.
-Another interesting result in your work is that Land Plants that 
+Another interesting result is that land plants that 
 represent single sublineage originating from the large and diverse 
-lineage of Green Algae in Eucaryots history are present in two different 
+lineage of green algae in Eucaryots history are present in two different 
 branches of the DOGMA tree, associated with Green Algae, one branch 
-comprising the "inferior" Land Plants (mosses and ferns) and the second 
-comprising the "superior" Land Plants (Conifers and flowering plants). 
+comprising the basal grade of land plants (mosses and ferns) and the second 
+comprising the most internal lineage of land plants (Conifers and flowering plants). 
 But independently of their split in two distinct branches of the DOGMA 
 tree, the Land Plants always show a higher number of functional genes in 
-their chloroplasts than their related Green Algae, probably meaning that 
+their chloroplasts than the green algae from which they emerged, probably meaning that 
 terrestrial way of life necessitates more functional genes for an 
 optimal photosynthesis than marine way of life. But a more detailed 
-analysis of selected genes is necessary to better understad the reasons why.
+analysis of selected genes is necessary to better understad the reasons why?
+
+
+