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The Effects of Sulphur Dioxide on Phloem Transport in Two Cereals

R. P. GOULD, P. E. H. MINCHIN and P. C. YOUNG
Journal of Experimental Botany
Vol. 39, No. 205 (August 1988), pp. 997-1007
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/23692037
Page Count: 11
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The Effects of Sulphur Dioxide on Phloem Transport in Two Cereals
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Abstract

In vivo investigations using 11C-labelled photosynthate revealed that there is a change in the patterns of tracer profiles when cereal leaves are exposed to SO2. The change after exposure to SO2 was interpreted in terms of a decrease in lateral water flow into the sieve tubes brought about by reduced phloem loading along the length of a leaf. Analysis also revealed that the speed of translocation was reduced, as expected by the Münch model of phloem transport.

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