B. Girdle-shaped. Within a few hours the characteristic shape, to a casual glance that of a star, has been developed. The life-cycle of Stigeoclonium amoenum Kiitz. Some members have setae (Coleochaete) or hairs (Stigeoclonium) of different types. The chloroplasts and eyespots of the fused gametes remain distinct inside the zygote for less than a day; before they are completely mature only a single irregular chloroplast is to be seen and the eyespots have disappeared. 2006; Brouard et al. Shape of chloroplast in higher plant is. vi. The above algal points provide with some short introductory features of each algae. C. Reticulate. Stigeoclonium: other spp. The chloroplast is a discoid plastid which contains chlorophyll (green pigment) within the thylakoid membranes of the organelle. Two simultaneous runs were performed, each with 16 chains, for 2500000 generations on the SCENZ‐Grid cluster at Landcare Research, Palmerston North, New Zealand. division, the chloroplast of Chlorella is often divided into several parts and such cells resemble Muriella species. 2002; Bélanger et al. When the zygote is turned on its side (Textfigs. Each cylindrical cell of the filament, with the exception of the basal cell that serves as a rootlike holdfast, contains a netlike chloroplast and a large central vacuole. 2006; de Cambiaire et al. Considering this, which type of chloroplast is found in Oedogonium? Antialgal chemicals in Stigeoclonium tenue growth 369 ceils. 4, 6), it is seen that the star is of some thickness with convex upper and lower faces, The life-cycle of Stigeoclonium amoenum Kiitz. In the other media amended with antialgal chemicals, generally there is reduction in length of the cells except This (S. farctum) also appears to have concentric rings in the basal disc, due to the chloroplasts in adjacent filaments being aligned. have a less well-developed basal system than the one illustrated. The cells contain a parietal chloroplast with many pyrenoids. The shape and branch length priors were exponential. It also changes its shape as the cell ages. In the adult cells chloroplast disintegrates into polygonal parts, which differ in size. v. Erect system bears reproductive structures. This organelle is present in the green parts of plants where photosynthesis takes place. iv. iii. Chloroplast is single, parietal and band-shaped and contains one to many pyrenoids. Stigeoclonium basal cells dominate the sparse periphyton in highly shaded forest streams in east Tennessee (Steinman, 1992; Hill et al., 1995). and rounded sides bearing irregular rows of short blunt spines. A. Discoid. Oedogonium filaments are typically unbranched and only one cell thick. 297 and rounded sides bearing irregular rows of short blunt spines. D. Cup-shaped. In accordance with the description, the chloroplast of young cells of Muriella is band-shaped or pot-shaped, later it forms a hollow sphere. Answer. The hairs may be in the form of single elon­gated cell or rows of fine and elongated cells. Stigeoclonium → Draparnaldia → Drapaenaldiopsis → Chara (11-14) ... but those of primary and secondary projecting systems have a curved plate shaped or parietal chloroplasts with many pyrenoids. All four completely sequenced chlorophycean chloroplast genomes, except that of Stigeoclonium, have maintained the widespread quadripartite structure consisting of a large inverted repeat (IR) and two single copies regions (Maul et al.