ISSN:
1573-5036
Keywords:
Ectomycorrhiza
;
Flooding
;
Michigan
;
Peat
;
Phosphorus
;
Salix
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Willows growing in a north central Michigan wetland were found to be ectomycorrhizal throughout the 1978 growing season on each of two sites (one water-saturated, one relatively drier). Each site was dominated by a mix of sedges (Carex spp.) and willows (Salix spp.). On both sites, phosphorus was added at two levels (20 or 200 kg P ha−1) to simulate potential inputs from the disposal of secondarily-treated municipal wastewater. The intensity of willow root infection was determined by scoring root tips on a 0 to 4 scale based on mantle-, intercellular hyphae-, and root epidermal cell characteristics. Infection on the wet site remained uniformly heavy in July and August when P was added, but it declined significantly during August for control plants at both sites. When water levels increased during September, the intensity of mycorrhizal infection increased on control plants on the wet site. On the drier site, mycorrhizal intensity decreased on controls and on plants exposed to the highest P levels. Between August and September samplings, mycorrhizal intensity increased considerably on dry-site controls but did not change on plants exposed to added P.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02184550
