Roots and nitrogen-fixing nodules. Tangled root system that has numerous nitrogen-fixing nodules (rounded protuberances). Nodules of this type are produced by species of Rhizobium bacteria in the soil entering the roots of leguminous plants. The bacterium benefits from a safe environment within the plant,and the plant benefits from the bacterial ability to fix atmospheric nitrogen within the nodule. This is an example of symbiosis. These roots are part of a Thermopsis rhombifolia flowering plant,found in the USA from the Rocky Mountains to New Mexico | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3626 px × 4835 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |