Coelastrella

<***藻Coelastrella Chodat , 1922

綠藻門Chlorophyta 綠藻綱Chlorophyceae 環藻目Sphaeropleales 柵藻科 Scenedesmaceae ***藻屬Coelastrella

 

描述：Thalli microscopic, unicellular or in few-celled aggregations. Cell wall hyaline to brownish with 16-40 longitudinal striations with polar thickenings absent or poorly developed; ultrastructurally, cell wall with inner, mostly polysaccharide layer and outer trilamellate layer created by coalescence of trilaminar plates produced via ER-derived vesicles; outer cell wall layer with undulate outline. Cell walls contain acetoresistant material, often thicken and peel off. Cells with numerous conspicuous vacuoles. Cells uninucleate, apparently without centrioles; chloroplast single and parietal consisting of polygonal, parietal plates or strips; pyrenoid single per cell with homogeneous stroma and surrounded by starch grains. Mature cultures brick red. Asexual reproduction by autospores, 2-16 per cell; released by rupture of parental cell wall. Flagellated stages and sexual reproduction unknown. 此圖只是Coelastrella其中一種形態。