Phosphorus deficiencies invoke optimal allocation of exoenzymes by ectomycorrhizas

Marty Kranabetter, Justin Meeds, Ieva Zigg, Dave Dunn, Francois Miros, Paul Shipley & Melanie Jones
Ectomycorrhizal (EM) fungi can acquire phosphorus (P) through the production of extracellular hydrolytic enzymes (exoenzymes), but it is unclear as to the manner and extent native EM fungal communities respond to declining soil P availability. We examined the activity of six exoenzymes (xylosidase, N-acetyl glucosaminidase, b-glucosidase, acid phosphomonoesterase, acid phosphodiesterase [APD], laccase) from EM roots of Pseudotsuga menzesii across a soil podzolization gradient of coastal British Columbia. We found APD activity increased 4-fold in a...
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