Freebase(0.00 / 0 votes)Rate this definition: Root nodule. Root nodules occur on the roots of plants that associate with symbiotic nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia.
Ayurvedic health benefits of bottle gourd/lau/ lauki: 1  Ayurveda recommends cooked lauki or bottle gourd for better digestion. It is cooling, calming, diuretic and anti-bilious (reduces bile and stops indigestion).
Along with potassium, bitter gourd possesses a number of nutrients that promote overall health. Bitter gourds contain an insulin called polypeptide-P, which helps keep blood sugar in check. They are also rich in vitamin C, an antioxidant that helps prevent cancer by battling free radicals in the body.long with potassium, bitter gourd possesses a number of nutrients that promote overall health. Bitter gourds contain an insulin called polypeptide-P, which helps keep blood sugar in check. They are also rich in vitamin C, an antioxidant that helps prevent cancer by battling free radicals in the body.