Table I.

Plant growth (dry wt) and P uptake (mg P)a per pot (two plants) of flax, medic, and tomato in symbiosis with three arbuscular mycorrhizal fungi, G. rosea, G. caledonium, or G. intraradices. Values are means and ses of means of three replicate pots, except for NM flax and tomato for which there were four replicates.

Plant NM G. roseaG. caledoniumG. intraradices
Dry Wt P Dry Wt P Dry Wt P Dry Wt P
g mg g mg g mg g mg
Flax 0.4 ± 0.0 0.4 ± 0.03 0.8 ± 0.1 1.2 ± 0.1 4.8 ± 0.1 4.7 ± 0.2 6.1 ± 0.1 7.8 ± 0.1
Medic 1.5 ± 0.1 2.1 ± 0.2 1.0 ± 0.1 2.2 ± 0.1 4.8 ± 0.2 6.3 ± 0.3 4.8 ± 0.3 8.2 ± 0.1
Tomato 7.5 ± 0.4 9.0 ± 0.35 5.1 ± 0.4 6.6 ± 0.5 6.6 ± 0.2 8.1 ± 0.3 6.1 ± 0.1 8.6 ± 0.2
  • a Dried ground plant material was digested in nitric:perchloric acid (4:1, v:v). Total P content of the extracts was measured by the molybdate blue method (Murphy and Riley, 1962) on a Technicon Autoanalyser II (Analytical Instrument Recycle, Golden, CO).