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SITES OF EXUDATION OF 14 C‐LABELLED COMPOUNDS FROM WHEAT ROOTS
Author(s) -
McDOUGALL BARBARA M.,
ROVIRA A. D.
Publication year - 1970
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1970.tb02479.x
Subject(s) - rhizosphere , plant roots , microorganism , botany , chemistry , biology , bacteria , genetics
S ummary The combination of autoradiography and a filter paper ‘sandwich’technique using wheat plants labelled with 14 C has shown that roots of wheat exude two types of compounds, viz. (a) non‐diffusible material released from the apices of both primary and lateral roots and (b) diffusible material released along the whole length of the roots. The high amount of non‐diffusible material compared with diffusible material suggests that the former may be more significant than previously anticipated in relation to root functions and microorganisms in the rhizosphere.