Talk:Rhizosphere

message: I reverted, removing the following underlined text:
Rhizosphere as a tree's root zone. It is the region of soil that is directly influenced by plant roots. Generally, well developed rhizosphere's have quicker mineral weathering rates and slower landscape erosion rates. Size of the rhizosphere is directly related to site water charactersitics, topography, and the type of vegetation present. In terms of water, areas of water surplus (more rainfall than evaporation) thicker rhizosphere's are found than in drier climates. Topography acts as a control of water availability where steeper sites shed water and soil, thus reducing the capacity for a deep rhizosphere to develop. the type of vegetation is a critical factor in determining depth of the rhizosphere, namely due to the level of carbon cycling associated with different plants. Deciduous plants shed leaves annually, and this input of carbon is vital in developing deeper root zones.
This effect is by transfer of root exudates and root tissue to soil. This process is termed rhizodeposition. In the rhizosphere, soil microorganisms (such as mycorrhiza, worms, nematodes, and springtails), burrowing fauna (such as wombats, moles, and rabbits) and the plant function of roots are critical for the rhizosphere. Mycorrhiza is a fungal association with root surfaces that are observed terrestrially via toadstools (reproductive heads). These organisms break down mineral surfaces and free up nutrients for plant functionality. Worms and nematodes perform similar functions, however, they dissolve minerals through digestive processes associated with enzymes. These organisms and other burrowing fauna are important in the rhizosphere as they penetrate soil colloids creating soil pores (gaps between soil aggregates). Aggregation of soil is essential for the input of surface water and air, both of which maintain soil health. Root interaction within the rhizosphere is characterised by the exudation of organic compunds (namely organic anions), and the transference of organic tissue matter into the soil. This process is termed rhizodeposition and is essentially a soil "building" process. In nutrient deficient or nutrient toxic areas, this process reduces the impact that the stress is having on the plant.
The rhizosphere is not synonymous with root zone, plant rooting depth or rooting soil depth. It is a component within the root zone.  The root zone is made up of both rhizospheric soil and bulk  soil. Perhaps the above can be used to create a new article: root zone. -- Paleorthid 19:23, 3 July 2006 (UTC)
thread_title:  Root zone 

message: Hello fellow Wikipedians,
I have just added archive links to  on Rhizosphere. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20070312061312/http://uwstudentweb.uwyo.edu:80/T/Twhite/ to http://uwstudentweb.uwyo.edu/T/Twhite/
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thread_title:  External links modified 

message: Beginning with reference 4, which is,http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.0040226 and source 5, which is,http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.0040239 I included information to back up previously written material concerning bacterial integration into leguminous root nodules and Mycorrhizal fungi. 
Additionally, I think that the article could benefit from fleshing out in the direction of (1) how roots chemically interact with the soil and the impacts this has on nutrient uptake (2) and the ecology of pathogenic and symbiotic microbes in the rhizosphere. These will be covered by (1),http://link.springer.com/article/10.1023/A:1004356007312,http://link.springer.com.ezproxy.lib.purdue.edu/article/10.1023/A%3A1013351617532 (2)http://www.annualreviews.org/doi/pdf/10.1146/annurev.py.26.090188.002115,,http://annualreviews.org/doi/abs/10.1146/annurev.phyto.36.1.453,http://annualreviews.org/doi/pdf/10.1146/annurev.arplant.57.032905.105159 and.http://www.sciencedirect.com/science/article/pii/S0038071797001247 These are just beginning sources and I will continue to find more applicable information as time goes on.
Randalj16 (talk) 03:59, 19 February 2017 (UTC)
thread_title:  New sources for expansion of the article 

message: I came upon the term "endorhiza" while reading about the microbiome of plant roots. However, when I search Wikipedia, the term surprisingly doesn't show up! So I went on a little search adventure, and now I'm more confused than ever. The definition here says the rhisozphere is a "narrow region of soil or substrate that is directly influenced by root secretions and associated soil microorganisms." However, I'm landing on other definitions and contradictions. The Encyclopedia of Microbiology, page 336, seems to haphazardly define the rhizosphere in a different manner in Figure 1: "The rhizosphere includes the root interior (endorhiza), the root epidermal surface (rhizoplane), and closely associated soul influenced by root exudates." This definition doesn't jive with the current Wikipedia definition. Microbial Diversity in Ecosystem Sustainability and Biotechnological Applications, pages 286 and 287, describe the rhizosphere as "the soil-plant interface," with the endorhiza as a sub-grouped microenvironment of the rhizosphere. This paper by Backman and Sikora, however, seems to separate the endorhiza out from the rhizosphere: "Microbial communities in the endorhiza, both bacterial and fungal, have been shown to be important regulators of root health, whether they are obligate symbionts or saprophytic mutualists. Their presence has been shown to have a greater impact on plant health than those active in the rhizosphere." Unfortunately they don't actually define either microregion. Montoya et al. (the paper that sparked all this) also separate the endorhiza out from the rhizosphere. Similarly, Winston et al. seem to classify the endorhiza separate from the rhizosphere. This suggests the Encyclopedia of Microbiology definition may be non-standard? Interestingly, Walker et al. seem to say the most about the endorhiza of anything else I've found and may make a good source for any added content concerning this microregion.
The Wikipedia definition seems to based off the Walker et al. definition. The difference between these two regions has been queried before, but questions remain. It's further complicated by varying dictionary definitions which describe the endorhiza simply as "any monocotyledonous plant."
This leads me to ask:
# Is the current Wikipedia definition of the rhizosphere accurate? and
# What do we say about the endorhiza, and where do we say it?
My guess is the endorhiza microregion is separate from the rhiosphere, and the current definition is still largely correct. But if that's true, does that mean a new article for the endorhiza needs to be created, despite the dearth of sources that exclusively discuss it? Hopefully someone with significant botany experience can help sort this out! Lostraven (talk) 21:26, 14 September 2020 (UTC)
thread_title:  Questions regarding the accuracy of definition and where to discuss the endorhiza 

message: Hi  I don't know enough about this to be sure, but I get the impression I would oppose this because these are inherently separable subjects. In other words, if DSS just became a redirect here then it would still be a . It seems to me that turning it into a  would be going backwards. In other words DSS should be improved, not just done away with. (But no, I don't know enough about this to improve it myself.) Invasive Spices (talk) 21:18, 20 February 2021 (UTC)
replies: text: Hello Invasive Spices I added tag (don't know why its not listed for discussion) - it seemed to me at the time that it was just yet another entry name for the sake of a page creation, which could be covered on the rhizosphere page. Perhaps a better home for it could be on the Soil page or better still in view of that page's length merged with similar items from there to a new page. I may just remove the merge tag as it hasn't been properly listed. A possibility is to mention DSS on rhizosphere page and see if it later lends itself to a redirect.? --Iztwoz (talk) 09:49, 21 February 2021 (UTC)

text: Since disease suppressive soils is confined to the influence of bacteria, the article would more comfortably merge with root microbiome — Epipelagic (talk) 04:59, 7 March 2021 (UTC)

text: * I'm very much under the impression that bacterial antagonism of fungi is just the most common subject in what we know of DSS, but that some fungi are also suppressive. Invasive Spices (talk) 19:57, 18 October 2021 (UTC)
thread_title:  Proposed merge with Disease suppressive soils 

message: I propose completely moving the methods section of this article, as the information contained there is not necessarily relevant to the topic. For example, most of the bullet points are neither sufficiently explained or specific to rhizosphere research. Does anyone have any thoughts on this? Fuchs190 (talk) 06:20, 6 March 2024 (UTC)
thread_title:  Proposed deletion of "methods" section