YEAST LACTOSE AGAR

Description

Symbiotic nitrogen fixation is accomplished by bacteria of the genus Rhizobium in association with legumes (plants that bear seeds in pods). These bacteria infect the root system of the legumes and further invade the host plant cells via an infection thread. Some of the cells of the plant are thus infected causing cell enlargement and an increased rate of cell division, leading to the formation of abnormal growth (nodules) on the root system. The legume, the bacteria and the nodule together constitute the nitrogen fixing system. The bacteria make nitrogen available to the plant, and in turn the bacteria derive nutrients from the tissues of the plant. Yeast Lactose Agar is used for cultivation of soil microorganisms such as Rhizobium species.