UPTAKE OF 32P BY PINUS RADIATA ROOTS INOCULATED WITH SUILLUS LUTEUS AND CENOCOCCUM GRANIFORME FROM DIFFERENT SOURCES OF AVAILABLE PHOSPHATE

Abstract

The efficiency of the mycorrhizal fungi Cenococcum graniforme and Suillus luteus on young seedlings of Pinus radiata for phosphorus uptake from different sources was investigated using 32P. There was a stimulatory effect of mycorrhizas with Suillus luteus on uptake of phosphorus. Cenococcum graniforme had a stimulatory effect on incorporation of 32P only when most of the phosphorus was in organic form. In the other conditions this symbiont had an inhibitory effect. There was a greater accumulation of phosphate in the roots than in the green parts of the seedlings. Copyright © 1973, Wiley Blackwell. All rights reserved