Department of Plant and Soil Science, University of Aberdeen, Aberdeen, Aberdeen, AB9 2UE, Scotland, UK.
Distribution of photosynthetically fixed carbon within root systems of Eucalyptus pilularis plants ectomycorrhizal with Pisolithus tinctorius
Article first published online: 28 APR 2006
Volume 112, Issue 4, pages 495–500, August 1989
How to Cite
CAIRNEY, J. W. G., ASHFORD, A. E. and ALLAWAY, W. G. (1989), Distribution of photosynthetically fixed carbon within root systems of Eucalyptus pilularis plants ectomycorrhizal with Pisolithus tinctorius. New Phytologist, 112: 495–500. doi: 10.1111/j.1469-8137.1989.tb00343.x
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- (Received 6 February 1989; accepted 2 May 1989)
- carbon transfer;
In intact seedlings of Eucalyptus pilularis Stn. ectomycorrhizal with Pisolithus tinctorius (Pers.) Coker & Couch in growth pouches, and labelled photosynthetically with 14C4 more radioactivity was translocated into mycorrhizal than to non-mycorrhizal roots. Results from autoradiography of intact root systems were supported by data from scintillation counting of individual root tips. Greater 14C accumulation occurred in young than in older mycorrhizas. It is proposed that individual mycorrhizal roots act most strongly as carbon sinks early in their life and that there is a progressive reduction in the amount of photosynthate translocated to them as they age.