Rhizosphere


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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 ?
In returns it increase the root exudates from plant to attracts PGPR and also increases root exudation by loosening plant cell walls which provide nutrients to rhizosphere bacteria (Riera et al., 2017).
We were able to transfer the synthetic signalling pathway to a number of plants, including cereals, and engineer a response by rhizosphere bacteria to rhizopine.'
In this research, we used indigenous PSBs isolated from the sugarcane rhizosphere by Lamizadeh et al.
The rhizosphere microbiome and plant health, Trends Plant Sci.
The pH in water increased with the increasing doses of limestone both in the rhizosphere and bulk soil (Table 3), which was expected.
In particular, we studied how the abundance of bacteria and nirS-type denitrifiers changes in the rhizosphere and rhizoplane of three emergent freshwater macrophytes (Juncus effusus, Peltandra virginica, and Typha latifolia) in two tidal freshwater wetlands.
Plant Growth Promoting Rhizobacteria (PGPR) also do concentrate in the rhizosphere soil and confer the plants with beneficial effects such as solubilization of mineral nutrients, fixation of nitrogen, and disease suppression resulting from plant pathogens [12-17].
The inoculum consisted of rhizosphere soil from 4 months old maize pot cultures containing spores, hyphae and heavily colonized root pieces.
(2017) the soil at Nova Esperanga, a rural farming community located within the limit of Manaus, AM, Brazil, where the Coriandrum sativum (coriander) rhizosphere soil samples were collected, presents a sandy texture and at 10-20 cm depth is considered fertile.
Over the last two years, VBC has made sizeable commitments to rhizosphere technologies including the acquisition of Mycorrhizal Applications, LLC (MA) and several licensing and research agreements designed to accelerate its root zone portfolio.
Various rhizosphere bacteria are potential (micro) biological pesticides which are able to protect plants against disease and improve plant yield [11].