Plant Diseases Division, D.S.I.R., Private Bag, Auckland, New Zealand.
TRANSLOCATION AND TRANSFER OF NUTRIENTS IN VESICULAR-ARBUSCULAR MYCORRHIZAS
II. UPTAKE AND TRANSLOCATION OF PHOSPHORUS, ZINC AND SULPHUR
Article first published online: 2 MAY 2006
Volume 81, Issue 1, pages 43–52, January 1978
How to Cite
COOPER, K. M. and TINKER, P. B. (1978), TRANSLOCATION AND TRANSFER OF NUTRIENTS IN VESICULAR-ARBUSCULAR MYCORRHIZAS. New Phytologist, 81: 43–52. doi: 10.1111/j.1469-8137.1978.tb01602.x
- Issue published online: 2 MAY 2006
- Article first published online: 2 MAY 2006
- (Received 11 January 1978)
Trifolium repens (white clover) or Allium cepa (onion) infected with the mycorrhizal fungus Glomus mosseae were grown in split-plate cultures, so that nutrients could be supplied to the external hyphae only. The uptake and translocation of 32P, 65Zn and 35S by hyphae of the fungus was measured.
A lag phase of 2-3 days in the appearance of 32P in the shoot was caused by a delay in the uptake and translocation of P by the hyphae, rather than in transfer from fungus to host.
The calculated maximum translocation rate of P for onion was 6.4 × 10−16 mole s−1, and the P flux in the hyphae about 2 × 10−10 mole cm−2 s−1. The molar amounts of P, S and Zn translocated were in the ratio of 35:5:1 and the mean fluxes in the ratio of 50:8:1 with clover.