Calcium-45 and 32P were injected into soil 4.5 cm from onion root surfaces at rates designed to label available pools of Ca and P at equivalent specific activities. Both tracers were detected in mycorrhizal but not anonmycorrhizal plants after 5 days. Calcium-45 was detected less frequently and in much lower amounts than 32P, indicating that Ca is not translocated to roots through mycorrhizal hyphae as readily as P.
No takes yet. Share an insight, caveat, or question.
Rhodes et al. (1978) studied this question.