INFLOW OF PHOSPHATE INTO MYCORRHIZAL AND NON‐MYCORRHIZAL PLANTS OF <i>TRIFOLIUM SUBTERRANEUM</i> AT DIFFERENT LEVELS OF SOIL PHOSPHATE
New PhytologistPublished 1 February 1982Open access
Sally E. Smith
Citations106
SJR quartileQ1
SJR score3.29
SNIP2.42
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TL;DR
Rapid growth of roots at high levels of Na2HPO4 resulted in reductions in percentage root length infected by mycorrhizas, and high rates of uptake were associated with reductions in root: shoot dry wt ratios.
Abstract
S ummary During early growth of mycorrhizal and non‐mycorrhizal plants of Trifolium subterraneum fertilized with soluble (Na 2 HPO 4 ) phosphate, inflow of phosphate (moles P absorbed per unit length root per unit time) into mycorrhizal roots from soil exceeded that into non‐mycorrhizal roots over a range of levels of phosphate. High rates of uptake (up to 45 × 10 −15 mol phosphate cm −1 s −1 ) were associated with reductions in root: shoot dry wt ratios. The length of mycorrhizal root per plant was little affected by fertilization with phosphate. However, rapid growth of roots at high levels of Na 2 HPO 4 resulted in reductions in percentage root length infected by mycorrhizas. Results are discussed with respect to rates of uptake by whole plants and to differences in distribution of phosphate between roots and shoots in mycorrhizal and non‐mycorrhizal plants.
Keywords
Agricultural and Biological Sciences
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