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PLANT ROOT EXCRETIONS IN RELATION TO THE RHIZOSPHERE EFFECT: 1. THE NATURE OF ROOT EXUDATE FROM OATS AND PEAS

A. D. ROVIRA
Plant and Soil
Vol. 7, No. 2 (January 1956), pp. 178-194
Published by: Springer
Stable URL: http://www.jstor.org/stable/42931676
Page Count: 17
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PLANT ROOT EXCRETIONS IN RELATION TO THE RHIZOSPHERE EFFECT: 1. THE NATURE OF ROOT EXUDATE FROM OATS AND PEAS
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Abstract

The excretory products of roots of peas and oats grown aseptically in quartz sand were studied by paper chromatography. Peas were found to excrete considerable amounts of amino material during 21 days growth with 22 different amino compounds, while oats excreted less consisting of Marnino compounds. The proportions of the various amino acids in the exudates differed between peas and oats. Fructose and glucose were excreted by both plants only during the first ten days of growth. U-V absorbing and fluorescent compounds were also excreted. The approximate amounts of sloughed-off cell material from both peas and oats after 10 and 21 days were also estimated.

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