AGRC1021 Lecture 11: Soil and Plant Nutrition L11
6 Aug 2018
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Concept 37. 3 plant nutrition often involves relationships w. The roots of plants belong to subterranean communities that interact with. Among these are certain species of bacteria and fungi that have coe relationships with roots that enhance the nutrition of both partners. The two most important examples of mutualistic interactions are nitro bacteria) and the formation of mycorrhizae (symbiosis of plant roots. Some plant species form symbiotic relationships with nitrogen-fixing bacte. This provides their roots with a built-in source of fixed nitrogen for assi. Much of the research on this symbiosis has focused on the agricultu including peas, beans, soybeans, peanuts, alfalfa, and clover. A legume"s roots have swellings called nodules, composed of plant cells genus rhizobium. Inside the nodule, rhizobium bacteria assume a form called bacterio formed by the root cell. Legume-rhizobium symbioses produce more usable nitrogen for pla farmers. Subsequent crops can also benefit from the usable nitrogen. Lignified external layers of the nodule limit gas exchange.
