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Bangia
''Bangia'' is an extant genus of division Rhodophyta that grows in marine or freshwater habitats. ''Bangia'' has small thalli with rapid growth and high reproductive output, and exhibits behavior characteristic of r-selected species. The plants are attached by down-growing rhizoids, usually in dense purple-black to rust-colored clumps. The chloroplasts of ''Bangia'', like others in the division Rhodophyta, contain chlorophyll a and sometimes chlorophyll d, as well as accessory pigments such as phycobilin pigments and xanthophylls. Depending on the relative proportions of these pigments and the light conditions, the overall color of the plant can range from green to red to purple to grey; however, the red pigment, phycoerythrin, is usually dominant.
== Species ==
''Bangia atropurpurea'' (Maertens ex Roth) C.Agardh.〔Boelens, G., Boelens, R., Minchin, B. and Minchin, D. 2014 ''Bangia atropurpurea'' (Maertens ex Roth) C. Agardh (Rhodophyta) in the Grand Canal, Ireland. ''Ir Nat. J.'' 33: 128 - 129〕
=== Description ===
''Bangia'' is a red alga that arises from a discoid holdfast and short stipe consisting of the extensions of rhizoidal cells. Bangia has unbranched, erect thalli forming initially uniseriate filaments becoming multiseriate at maturity. The plant is composed of filiform, unbranched cylinders of cells embedded in a firm gelatinous matrix. The cell contains a stellate chloroplast with prominent pyrenoid, as well as single thylakoids (characteristic of division Rhodophyta). The growth of ''Bangia'' is diffuse and intercalary, and each cell is quadrate to rectangular in shape. Primary pitt connections are absent in all but the conchocelis stage.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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