Current Topics in Root and Rhizosphere Biology

H680 ( 1 credit)

Our understanding of the biology, biochemistry and genetic development of roots has considerably improved during the last decade. In contrast, the processes mediated by roots in the rhizosphere such as the secretion of root border cells and root exudates are not yet well understood. In addition to the classical roles of providing mechanical support and allowing water/nutrient uptake, roots also perform certain specialized roles including the ability to synthesize, accumulate, and secrete a diverse array of compounds. Within the complex and diverse underground world, roots are not simply passive targets for soil organisms. Rather, the compounds secreted by plant roots, known as root exudates, serve important roles as chemical attractants and repellants in the rhizosphere, the narrow zone of soil immediately surrounding the root system. Through the exudation of a wide variety of compounds, roots may regulate the soil microbial community in their immediate vicinity, cope with herbivores, encourage beneficial symbioses, change the chemical and physical properties of the soil, and inhibit the growth of competing plant species.

Root and rhizosphere biology is currently an exciting and dynamic sub discipline; it is also characteristic of the most exciting biological research performed today in that it combines developments and research from several fields, including research performed in my laboratory. Current Topics in Root and Rhizosphere Biology is a 1-credit course offered at the 600 level, and is designed to provide an in-depth overview of the biology, biochemistry and chemical ecology of roots and the rhizospheric processes related to roots. Special emphasis will be placed on understanding the role of root exudates in the underground communication of plants, microbes, and soil.

Prerequisites: Biology/ Botany (BY 103, BZ 120 or BZ CC120) and Chemistry (CCC 107, CCC 108, CCC 111, CCC113, or BC 351), plus permission of the instructor