Do various crops have different root exudates?
Do crops produce and release different root exudates during various growth stage?
Yes that's right
For example, leguminous plants before infection with root nodule bacteria, their secretions differ after infection
Yes.
The quantity and quality of root exudates depends on
plant species, cultivar, growth stage and environ-
mental factors. Root exudates from some plant species
can inhibit potential soil-borne pathogens by releasing
allelochemicals, while other promote the growth of
pathogens.
Plant root exudates are fluids emitted through the roots of plants. These secretion influence the rhizosphere around the roots to inhibit harmful microbes and promote the grow of self and kin plants. Root exudates provide favorable environment for soil microbes by providing them nutrients, which in return provide nutrients and plant growth promoting hormones, induce systemic resistance against biotic and abiotic stress and produce VOCs that improve plant growth and roots architecture. Root exudation is a complex phenomenon encompassing processes that drive C transport to roots and exudation from roots to soil. root exudates of different plants such as maize, wheat, rape, and Medicago truncatula grown under similar conditions play vital role in determining the bacterial community
A number of methods have been defined for analyzing of the plant root exudate compositions. In one method, the exudates of mature trees . However, since this method lacks sterile conditions therefore, microbial populations can lead to major impact. The other method uses flavonoid glucosides degradationunder two types of soils for legume cultivations In addition, the other alternate methods based axenic hydroponic systems have been used These methods are easy to control. However hydroponic systems are artificial in nature and may represent stress response due to oxygen restraint and lack of proper root support. Still, hydroponics systems are better for sampling of exudates. In a study, on Arabidopsis thaliana root exudates, by LC-MS analysis, discovered that majority biomolecules are produced late . Several other factors, such as host plant genotype, type of soil, and methods of cultivation, play vital role in determining the microbial community structure . Using a stable isotope probing (SIP) method, Haichar et al. discovered that root exudates of different plants such as maize, wheat, rape, and Medicago truncatula grown under similar conditions play vital role in determining the bacterial community
Yes that's right
For example, leguminous plants before infection with root nodule bacteria, their secretions differ after infection
Yes, thats the reason , why the rhizosphere or endophyte microbiome is so different from one crop to another....it is simply the function of composition of root exudates...
@Elaheh
Yes, thats right.
The amount of root exudates that are released, differs from crop to crop depending on the little or extensive root/rhizome system.
Root exudation varies with different crop growth stages. And, crops have maximum root exudation at reproductive stages (flowering) compared to vegetative and maturity stages.
Please have a look: https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/root-exudates
Yes, Root exudates help the symbiosis of plant rhizobia and chelation of soil nutrients. Root exudates composition depends on the plant environment, plant species, and microbial composition of rhizosphere
Thats why , we say, every plant recruits a definite microbial community according to its metabolic requirement where root exudates dictate the type of one microbial community dominating over orher communities. ...In a way , it contains the signaling molecules in the crosstalk between microbe and interacting plant....
Yes, obviously there have different root exudates in different crops. For instance, it is distinctly appeared in leguminous crops than others.
please have a look at an excellent work enclosed , what we discussed previously , give more conviction .. but decoding the type of signals involved in interaction betweeen plants and an environment ...or even between two plants or plant and rhizsophere microbes...
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