Rhizosphere


Also found in: Dictionary, Medical, Wikipedia.

rhizosphere

[′rī·zə‚sfir]
(geology)
The soil region subject to the influence of plant roots and characterized by a zone of increased microbiological activity.

Rhizosphere

 

the layer of soil (2-3 mm) that surrounds the root of a plant and is inhabited by a large number of microorganisms.

The composition of the microflora of the rhizosphere depends on the soil type, ecological conditions, and the age of the plant. The surface of the root is inhabited by microorganisms predominantly of the epiphytic microflora of the seed. The microorganisms, which together are called the rhizoplane, play various roles: they convert certain compounds that are difficult for the plant to assimilate into readily assimilable ones, they synthesize biologically active substances, they enter into symbiosis with the plant, they excrete toxins, and they participate in the process of denitrification. Some representatives of the microflora parasitize plants.

References in periodicals archive ?
For the mycorrhizal treatment, different dosages like 100, 150 and 200 g of rhizosphere soil colonized by mycorrhizal fungus were added.
sativum rhizosphere soil samples were collected from a cultivation area used for growing vegetables, where the replacement of organic matter is continuous, providing sufficient nutrient to supply the needs of the plants and to maintain a microbial community in the rhizosphere.
Interestingly, the effects of LED were mostly observed on the in vivo formation of AMF propagules in plant rhizosphere and outside, as in the glass beads section.
Those microorganisms that are able to colonize the rhizosphere area around the plants roots and causing their bio-control potential are a natural factor to protect farming products against fungus that are soil borne [7,10, 25].
The first dataset was used to explore the effect of plant identity on soil biochemistry and the relationship between rhizosphere soil and foliage.
In this survey, carried out in the municipality of Oiapoque, it was observed that there were nematodes associated with the peach palm plant rhizosphere but none found in the roots of the plants.
VBC also has research agreements in place with BioMar, LidoChem, and Rhizobacter, all established leaders in emerging biorational technology for the rhizosphere and beyond.
Soil rhizobacteria may have also directly influenced metal solubility by changing heavy metal speciation in the rhizosphere of tall fescue, similar to what has been reported earlier by Jing et al.