Metabolic Activity of Bacterial Isolates From Wheat Rhizosphere and Control Soil

Zagallo, A. C.; Katznelson, H.

doi:10.1128/jb.73.6.760-764.1957

Cited by 30 publications

(2 citation statements)

References 17 publications

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“…Warburg metabolic studies with several substrates showed a much greater activity in the rhizosphere than in the non-rhizosphere soil. This difference was more pronounced than that indicated by the numbers of organisms, thus agreeing with the reports for higher physiological activity of rhizosphere organisms (Lochhead 1940, Zagallo andKatznelson 1957). The activities of these soils were greatly increased when remoistened after being kept airdried for 2 months in the laboratory.…”

Section: Discussionsupporting

confidence: 91%

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Studies on the Rhizosphere of Tall Fescue

Zagallo¹,

Bollen²

1962

Ecology

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Section: Discussionsupporting

confidence: 91%

“…Endogenous respiration of the rhizosphere was particularly high. This is attributable to greater numbers and greater physiological activity of the rhizosphere population, as has been observed by Zagallo and Katznelson ( 1957). and Katznelson and Rouatt ( 1957) with other plants.…”

Section: Resultssupporting

confidence: 54%

Studies on the Rhizosphere of Tall Fescue

Zagallo¹,

Bollen²

1962

Ecology

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Contribution of organic acids to the acidification of the rhizosphere of maize seedlings

Petersen

Böttger

1991

Plant Soil

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The participation of organic acids in the process of soil acidification was related to other H + pumping processes. The ratio between efflux of organic acids and proton secretion of maize roots was determined with the use of a pH-stat combined with a collecting system for organic acids. Changes in the composition of carboxylic acids influenced by nitrogen supply were monitored by HPLC and via enzymatic conversion. The following substances were found to be secreted by maize roots: glycolate, glyoxylate, fumarate, 2-oxoglutarate and oxalate. Malate, however, could not be detected.There is no organic acid dominantly secreted by the roots, but changes are observed during aging which might result from deficiencies of nutrients e.g.P.Fertilization of N-deficient plants with urea leads to a significant change in the composition of acids secreted. In this case, oxalate was additionally detected with a concomitant increase in glyoxylate, indicating important changes in metabolism.Acidification of the rhizosphere is predominantly maintained by secretion of protons, not by efflux of organic acids, which contributed 0.2 to 0.3% to this process only. The role of organic acids in nutrient uptake is discussed.

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Untersuchungen zur Frage wechselseitiger Beziehungen zwischen keimenden Samen und Mikroorganismen in Samenn�he

Mueller

1962

Archiv. Mikrobiol.

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Metabolic Activity of Bacterial Isolates From Wheat Rhizosphere and Control Soil

Cited by 30 publications

References 17 publications

Studies on the Rhizosphere of Tall Fescue

Studies on the Rhizosphere of Tall Fescue

Contribution of organic acids to the acidification of the rhizosphere of maize seedlings

Untersuchungen zur Frage wechselseitiger Beziehungen zwischen keimenden Samen und Mikroorganismen in Samenn�he

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