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What is Rhizosphere biology about?

The release of easily decomposable root exudates leads to higher microbial abundance and activity in the rhizosphere compared to the bulk soil. In this chapter the colonization of roots by microorganisms is outlined followed by discussion about how these microorganisms either enhance or reduce nutrient availability to plants. Important microorganisms with respect to plant nutrition are mycorrhizal fungi, which improve plant uptake of poorly mobile nutrients such as P and Zn via the network of hyphae extending into the surrounding soil. This chapter also discusses other beneficial effects of mycorrhiza such as increased tolerance to metals and drought and resistance to diseases. The reasons for differential responsiveness of plants to mycorrhizal colonization are outlined. General The rhizosphere is a dynamic system, changing over time scales ranging from diurnal to annual or longer . It is the site of signal exchange between plants and soil microbes that affect plant growth and microbial community structure and activity . The release of easily decomposable low-molecular-weight exudates by roots attracts soil microorganisms into the rhizosphere where they proliferate to densities th

Author

Petra Marschner

Publisher

Elsevier LTD

Published

2023

Language

EN

ISBN

9780323853521