Azolla plant. Coloured scanning electron micrograph (SEM) of part of an Azolla (water fern) plant. This plant has a symbiotic relationship with Anabaena cyanobacteria,where the cyanobacteria doubles the rate of photosynthesis and fulfils the nitrogen requirements of the plant. Both these factors give the water fern a competitive advantage over other water plants,a factor spotted by the Chinese 2000 years ago. The Anabaena-Azolla association is used as a green manure for rice crops. Anabaena is a filamentous organism,which,apart from vegetative cells,forms heterocysts and akinetes | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Diller, Stefan |
Bildgröße: | 3556 px × 4981 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |