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Distribution of photosynthetically fixed carbon within root systems of Eucalyptus pilularis plants ectomycorrhizal with Pisolithus tinctorius
Author(s) -
CAIRNEY J. W. G.,
ASHFORD A. E.,
ALLAWAY W. G.
Publication year - 1989
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.1469-8137.1989.tb00343.x
Subject(s) - pisolithus , botany , eucalyptus , ectomycorrhiza , biology , mycorrhizal fungi , mycorrhiza , carbon fibers , ectosymbiosis , symbiosis , horticulture , materials science , composite number , composite material , genetics , bacteria , inoculation
summary In intact seedlings of Eucalyptus pilularis Stn . ectomycorrhizal with Pisolithus tinctorius (Pers.) Coker & Couch in growth pouches, and labelled photosynthetically with 14 C 4 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 14 C 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.