What is it about?

The rhizosphere is home to a vast array of microorganisms that associates with plants and positively or negatively influences plant growth, whereas the rhizosheath is defined as soil strongly attached to plant root surfaces. The rhizosphere is home to numerous fungal and bacterial species that positively or negatively influence plant growth, while the rhizosheath is defined as the soil that is strongly attached to the plant root surfaces. The plant's rhizosphere can be considered as the root microbiome as well as the site for cellular communication.between prokaryotic and eukaryotic organisms.

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Why is it important?

This article describes the close interaction between macro- and microorganisms and the importance of the rhizosphere as a matrix for thinking of plant and microbe interactions as a microbiome that leads to a interaction between biotic and abiotic factors produces by the genomes of all its living partners--its hologenome.


The interactions of biotic factors from plants and microbes with the abiotic components of the environment, especially soil makes this scientific approach novel and timely in terms of thinking about soil preservation, soil restoration, and plant growth promotion for the future. Potential effects of neglecting the interplay of abiotic and biotic interactions that promote plant growth when soils are healthy can quickly change under conditions of reduced soil fertility, especially in heavily agriculturized areas, which cannot only reduced crop growth but also lead to desertification. Microbes, especially mycorrhizal fungi and nitrogen-fixing bacteria can fill the gap that nitrogen and phosphate deficiency lead to and help restore healthy soils. By treating the soil as a hologenome unit with a vast variety of beneficial microbes, we can hope to overcome the dysbiosls brought about by over-fertilization, especially of N and P, and other assaults to the soil that have occurred since the Green Revolution. It was an experiment that did not work.

Professor Ann M. Hirsch
University of California Los Angeles

Read the Original

This page is a summary of: The Hologenome Hypothesis and Its Application to Plant-Microbe Interactions on an Evolutionary Scale, January 2021, Springer Science + Business Media,
DOI: 10.1007/978-3-030-63512-1_21.
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