Difference between revisions of "Rhizosphere Interactions"

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===Rhizoplane===
 
===Rhizoplane===
The rizoplane refers to the environment in immediate physical contact with the roots. Microbes that live in the rizoplane are closer to the actual roots than the microbes in the risosphere. The functional definition is everything remaining after the roots have been shaken vigorously in water.
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The rizoplane refers to the environment in immediate physical contact with the roots. Microbes that live in the rizoplane are closer to the actual roots than the microbes in the risosphere. The functional definition is everything remaining after the roots have been shaken vigorously in water. There are more microbes (as counted by CFU) in the rizoplane than in the more loosely assoicated [rizosphere]
  
 
===Rhizosphere===
 
===Rhizosphere===

Revision as of 19:19, 9 March 2008

Introduction

The rizosphere refers to the region of soil near plant roots. Compared to the rest of soil, this area is relatively luxurious- nutrients are more plentiful and bacteria abound. Sylvia et al compare the rizosphere to an oasis.

Soil Environment Associated with Plants

Rhizoplane

The rizoplane refers to the environment in immediate physical contact with the roots. Microbes that live in the rizoplane are closer to the actual roots than the microbes in the risosphere. The functional definition is everything remaining after the roots have been shaken vigorously in water. There are more microbes (as counted by CFU) in the rizoplane than in the more loosely assoicated [rizosphere]

Rhizosphere

There are several subjective definitions of “rhizosphere” one is the zone of influence of plant roots- that may vary for the specific influence being tracked and the specific environment. A more general, functional definition is “the dirt that clings to roots after gentle shaking in water”. In general the rizosphere is a metabolically busier, faster moving, more competitive environment than the surrounding soil.

Physical Environment

Plant Exudates

Microbial Communities

Bacteria
Archaea
Fungi

Other

Biotic Interactions in the Rhizosphere

General Impacts on Plants of Rhizosphere Microorganisms

General Impacts on Rhizosphere Microorganisms of Plants

Symbiotic Relationships

Mycorrhizal Fungi

Other

Innoculants

References

  • Sylvia, D., Fuhrmann,J., Hartel, P., Zuberer, D. 2005. Principles and Applications of Soil Microbiology. Pearson Education Inc. New Jersey.

Edited by students of Kate Scow