L'analyse des électrons Microphotographie (SEM) de Rhodospirillum rubrum, Gram-négatif, bactérie pourpre non sulfureuses. Sa couleur provient de pigments caroténoïdes, rho

• Contributeur: Science Photo Library / Alamy Banque D'Images
• ID de l’image: 2ADCE61
• Taille du fichier: 25 MB (1,2 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 2725 x 3207 px | 23,1 x 27,2 cm | 9,1 x 10,7 inches | 300dpi
• Date de la prise de vue: 21 août 2017
• Photographe: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Informations supplémentaires

Scanning electron micrograph (SEM) of Rhodospirillum rubrum, Gram-negative, purple nonsulfur bacterium. Its colour comes from carotenoid pigments, rhodovibrin and spirilloxanthin. It is a spiral-shaped bacterium that has polar flagella and can live both anaerobically and aerobically. Under anaerobic growth conditions (without oxygen) it can photosynthesize using light (phototroph). As a phototroph, R. rubrum can grow autotrophically or heterotrophically. Photosynthesis by R. rubrum differs from that of plants, it does not have chlorophyll a, but bacteriochlorophyll. The carotenoids also help gather light energy for photosynthesis. Under aerobic growth conditions (with oxygen) it is called a chemotroph. R. rubrum is considered both heterotrophic and autotrophic. It is found in mud, pond water, and sewage samples. Magnification: x2, 600 when shortest axis printed at 25 millimetres.

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• 03bactéries
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• bactéries photosynthétiques
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• gram negativi
• rhodospirillum
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• spirale
• spirilla
• spirillum