Wheat responses to aggressive and non-aggressive arbuscular mycorrhizal fungi.
We predicted AMF that aggressively colonize wheat roots at low P supply would also aggressively colonize at high P supply, but provide no additional P uptake benefit and reduce growth. Kojonup loamy sand was supplied with P to provide suboptimal and supraoptimal P for growth of NM wheat in this soil. At low P supply, wheat growth was limited by P availability. All AMF isolates colonized wheat roots at 14 days after emergence of seedlings. This group, termed 'non-aggressive colonizers', included Acaulospora spp.