Rhodobacter

Abstract

Rho.do.bac' ter . Gr. n. rhodon the rose; M.L. masc. n. bacter equivalent of Gr. neut. n. bakterion a rod; M.L. masc. n. Rhodobacter red rod. Proteobacteria / Alphaproteobacteria / Rhodobacterales / Rhodobacteraceae / Rhodobacter Cells are ovoid or rod‐shaped , motile by polar flagella or non‐motile, divide by binary fission or budding, may produce capsules and slime, and may form chains of cells. Gram negative ; belong to the Alphaproteobacteria . Phototrophically grown cells form vesicular or lamellar internal photosynthetic membranes . The color of phototrophic cultures is yellow‐green to yellow‐brown, while aerobic cultures are pink to red. Photosynthetic pigments are bacteriochlorophyll a ( esterified with phytol ) and carotenoids of the spheroidene series . Ubiquinone 10 is the major quinone . Major fatty acids are C 18 and C 16 saturated and monounsaturated fatty acids with C 18 : 1 as predominant component. The mol % G + C of the DNA is : 64.4–73.2. Type species : Rhodobacter capsulatus (Molisch 1907) Imhoff, Trüper and Pfennig 1984, 342 ( Rhodonostoc capsulatum Molisch 1907, 23; Rhodopseudomonas capsulata (Molisch 1907) van Niel 1944, 92.)

Mussels and Local Conditions Interact to Influence Microbial Communities in Mussel Beds

“…Then, much of the sulfide formed by SRB in sediments is oxidized back to sulfate by sulfur-oxidizing bacteria (SOB; Jørgensen and Nelson, 2004 ). Among the bacteria that distinguish shell bacterial communities from other microhabitats, we find SOB in the genera Novosphingobium and Rhodobacter ( Table 2 ; Imhoff et al, 1984 ; Imhoff, 2015 ; Haosagul et al, 2020 ). We also see the family Comamonadaceae associated more strongly with mussel biodeposits than other microhabitats and this family has also been shown to oxidize sulfur compounds ( Zhang et al, 2017 ).…”

Screening and Characterization of Anoxigenic Photosynthetic Bacteria as Producer of Caroteniod Pigments From Palm Liquid Sewages

“…Selanjutnya untuk sifat fisiologi yaitu sel berbentuk batang, tergolong Gram negatif, katalase negatif, sulfida positif (memproduksi H2S), indol negatif, motil maupun nonmotil, TSIA positif maupun negatif, gelatin positif maupun negatif, sitrat negatif, dan starch agar positif. Hal ini diperkuat oleh penelitian Suresh et al, (2017) bahwa ciri morfologi spesies Rhodobacter azollae dan Rhodobacter lacus menghasilkan kultur merah, berbentuk batang, motil dan bersifat Gram negatif dan untuk Rhodobacter velkampii tidak menghasilkan mukus (Imhoff, 2015). Rhodopseudomonas, Guchanon (1992) menjabarkan ciri morfologi genus Rhodopseudomonas memiliki bentuk batang, motil maupun nonmotil, Gram negatif, menghasilkan pigmen karotenoid merah, hijau hingga cokelat kekuningan, menghasilkan vitamin, suhu optimum pertumbuhan sekitar 25 o C -35 o C dan pH optimum 5,5 -7,5.…”

Massilia litorea sp. nov., Marinobacter salinisoli sp. nov. and Rhodobacter xanthinilyticus sp. nov., isolated from coastal environments

“…Cells of the genus Rhodobacter are Gram-negative, ovoid or rod-shaped, motile by polar flagella or non-motile. Phototrophic growth occurs under anoxic conditions in the light and chemotrophic growth occur by aerobic respiration [9]. At the time of writing, the genus Rhodobacter comprises 15 species with valid published names [5].…”