Free Amino Acid Composition of the Plant Root Environment Under Field Conditions

Ivarson, K. C.; Sowden, F. J.

doi:10.4141/cjss69-014

Cited by 47 publications

(21 citation statements)

References 4 publications

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“…In the case of mineral nutrients, their concentrations fluctuate with season and this has been attributed to fluctuations of microbial activity which are themselves in turn influenced by changes of climatic factors (Gupta & Sowden & Ivarson (1966); 2, Ivarson & Sowden (1969);3, Read & Bajwa (1985); 4, Present study.…”

Section: A Comparison Of the Results Obtained By Hplc And Ninhydrinmentioning

confidence: 99%

“…A number of workers have indicated that non-amino acid compounds can be included in ninhydrin assays. Thus, the ninhydrin method was found by Ivarson & Sowden (1969) to give slightly higher values than did the Technicon amino-acid auto-analyser. They reported that the ratios of the ninhydrin to the autoanalyser method varied from 10 to 1'4.…”

Section: Quantitative Analysis Of Individual Amino Acids By Hplcmentioning

confidence: 99%

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The biology of mycorrhiza in the Ericaceae

Abuarghub

Read

1988

New Phytologist

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SUMMARYThe results of qualitative and quantitative analysis of the individual 'free' amino acids of a Calluna heathland soil are reported. The distribution of each identified amino acid is described in relation both to its position in the soil profile and to time of year. The amino aeids occurred in the following order of quantitative importance, histidine, glutamie acid, alanine, serine, aspartic acid, leucine, valine, glycine, arginine, isoleucine, lysine, phenylalanine, and tyrosine.The concentrations of total free amino aeids obtained by summing the individual values agreed remarkably closely with those obtained by the ninhydrin procedure. Analysis of the amino acids in terms of acidic, neutral and basic categories indicated that the neutral category was quantitatively the most important. The results are compared with those obtained in previous qualitative and quantitative analysis of individual amino acids from organic soils and their significance is discussed in relation to the myeorrhizal status of ericaceous plants.

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Section: A Comparison Of the Results Obtained By Hplc And Ninhydrinmentioning

confidence: 99%

Section: Quantitative Analysis Of Individual Amino Acids By Hplcmentioning

confidence: 99%

The biology of mycorrhiza in the Ericaceae

Abuarghub

Read

1988

New Phytologist

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show abstract

“…(See Saxby, 1969;Spakhov and Spakhova, 1970;Greaves and Wilson, 1969;Kowalenko and McKercher, 1971;Ivarson and Sowden, 1969;and Kononova, 1966, for more complete discussions of the organic compounds in soils. )…”

Section: Organic Chemistry Of Lead In Natural Water Systemsmentioning

confidence: 99%

Lead in the environment

Lovering¹

1976

Professional Paper

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“…Recently, in their studies using a non-sterile environment, Ivarson and Sowden (8) showed that under field conditions larger quantities of amino acids are found in the rhizosphere than in the non-rhizosphere. That study led to the present experiment which was designed to investigate the effect of growth stage, fertility and soil temperature on the amino acids of the rhizosphere as found under conditions approachinlg those of the natural environment.…”

Section: Introductionmentioning

confidence: 99%