AKRA Azotobacter

Bacteria of the genus Azotobacter form loose associations in the rhizosphere with a wide range of crops and belong to the group known as Plant Growth-Promoting Bacteria (PGPB). They are stimulated by root exudates and, in return, can contribute to nutrient supply through nitrogen fixation, without having to form a true symbiotic relationship such as that of nodule bacteria. This makes them considerably more versatile, as they can associate with a much wider range of plant species, whereas true symbionts such as nodule bacteria are generally specialised to particular host plants or groups of plants. Under favourable conditions, they contribute to biological nitrogen fixation and can therefore support crops such as maize, sugar beet, potatoes, oilseed rape and sunflowers. Azotobacter and other PGPBs promote root growth, improve access to nutrients and support plants under stress – for healthy crops and soils.