Full TGIF Record # 6767
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Web URL(s):http://www.jstor.org/stable/2432063
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http://www.jstor.org/stable/pdfplus/2432063.pdf
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Publication Type:
i
Refereed
Author(s):Foster, R. C.
Author Affiliation:Division of Soils, CSIRO, Glen Osmond, South Australia
Title:The ultrastructure and histochemistry of the rhizosphere
Source:New Phytologist. Vol. 89, No. 2, October 1981, p. 263-273.
Publishing Information:Oxford, England, United Kingdom: Blackwell Publishing, for the New Phytologist Trust
# of Pages:18
Related Web URL:http://www.jstor.org/stable/info/2432063
    Last checked: 08/14/2012
    Access conditions: Document is within a limited-access website
    Notes: Abstract only
Keywords:TIC Keywords: Paspalum notatum; Roots; Plant anatomy; Histochemical methods
Abstract/Contents:"Histochemical tests were applied at the ultrastructural level to the rhizospheres of mature roots which had been fixed in situ in the undisturbed soil fabrics in which they had grown in the field. The polysaccharides produced by soil fungi and bacteria were localized and distinguished from those secreted by the epidermal cell of roots. Differential hydrolysis of the carbohydrates in situ showed that of the gels deposited in the rhizosphere, those secreted by the fungi were most stable, and those secreted by the roots were the least stable to chemical hydrolysis. The histochemical tests were used to distinguish between the carbohydrates in the granular mucilage of the outer primary cell wall layer and those of the inner multilamellate secondary layers of the wall. A variety of tests showed that under field conditions, the primary wall was initially bounded externally by a thin cuticle, but that this was soon ruptured by the mechanical action of the soil or by the lytic activities of soil micro-organisms. The breakdown of the cuticle allowed the mucilage from the primary wall layer of the epidermal cells to escape into the soil and encloser nearby soil colloids to form 'mucigel'. The epidermal mucilages were therefore part of the cell wall and not a morphologically distinct layer at the root surface."
Language:English
References:50
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Foster, R. C. 1981. The ultrastructure and histochemistry of the rhizosphere. New Phytol. 89(2):p. 263-273.
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Web URL(s):
http://www.jstor.org/stable/2432063
    Last checked: 08/14/2012
    Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/pdfplus/2432063.pdf
    Last checked: 08/14/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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