%0 Journal Article
%T <i>Chroococcidiorella tianjinensis</i> gen. et sp. nov. (Trebouxiophyceae, Chlorophyta), a Green Alga Arises from the Cyanobacterium TDX16
%A Qinglin Dong
%A Xiangying Xing
%J American Journal of Plant Sciences
%P 1814-1826
%@ 2158-2750
%D 2020
%I Scientific Research Publishing
%R 10.4236/ajps.2020.1111130
%X All algae documented so far
are of unknown origin. Here, we provide a taxonomic description of the first
origin-known alga TDX16-DE that arises from the <i><span style=\"font-family:Verdana;\">Chroococcidiopsis</span></i><span style=\"font-family:Verdana;\">-like endosymbiotic cyanobacterium
TDX16 by de novo organelle biogenesis after acquiring its green algal host</span><i><span style=\"font-family:Verdana;\"> Haematococcus pluvialis</span></i><span style=\"font-family:Verdana;\">¡¯s DNA. TDX16-DE
is spherical or oval, with a diameter of 2.0-3.6 ¦Ìm, containing typical
chlorophyte pigments of chlorophyll a, chlorophyll b and lutein and reproducing
by autosporulation, whose 18S rRNA gene sequence shows the highest similarity
of 99.7% to that of </span><i><span style=\"font-family:Verdana;\">Chlorella vulgaris</span></i><span style=\"font-family:Verdana;\">.
However, TDX16-DE is only about half the size of</span><i><span style=\"font-family:Verdana;\"> C. vulgaris </span></i><span style=\"font-family:Verdana;\">and structurally similar to</span><i><span style=\"font-family:Verdana;\"> C. vulgaris</span></i><span style=\"font-family:Verdana;\"> only in having a chloroplast-localized pyrenoid, but
differs from</span><i><span style=\"font-family:Verdana;\"> C. vulgaris</span></i><span style=\"font-family:Verdana;\"> in that 1)
it possesses a double-membraned cytoplasmic envelope but lacks endoplasmic
reticulum and Golgi apparatus; and 2) its nuc</span><span style=\"font-family:Verdana;\">leus
is enclosed by two sets of envelopes (four</span><span style=\"font-family:;\" \"=\"\"> </span><span style=\"font-family:Verdana;\">unit membranes). Therefore</span><span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\">, based on these characters and the cyanobacterial
origin, we describe TDX16-DE as a new genus and species, </span><i><span style=\"font-family:Verdana;\">Chroococcidiorella tianjinensis</span></i><span style=\"font-family:Verdana;\"> gen. et sp. nov., which sets the
basis for multidisciplinary research.</span></span>
%K Green Algae
%K Cyanobacterial Origin
%K &lt
%K i&gt
%K Chroococcidiorella tianjinensis&lt
%K /i&gt
%K 18S rRNA Gene Sequence
%K Ultrastructure
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=104515