Summary
In a continuing search for field sources of endomycorrhizal fungi that tolerate high levels of available phosphorus in soil, samples were obtained from long-established liberally fertilized hops (Humulus lupulus L.) and peppermint (Mentha piperita L.) fields. In hops fields, where extractable P (Bray) levels ranged from 21–196 ppm, spores of twoAcaulospora spp. and sixGlomus spp. were isolated. From peppermint fields with P levels of 44 to 244 ppm, spores of oneAcaulospora sp., fourGlomus spp. and oneGigaspora sp. were obtained. Vesicular-arbuscular mycorrhizal (VAM) fungi were found colonizing most roots to some extent, despite the very high fertility of several sites. Although percentages of colonization in hops tended to be low, ranging from 0 to 9.3%, colonizations in peppermint roots were considerably higher averaging 26.5% between the sampled fields, notwithstanding P levels as high as 244 ppm. Curiously, considerable external VAM hyphae were found adherent to or entangling roots in many cases, even where percentage of root length with internal VAM structures was low. The functional benefit, neutrality, or detriment to plants of such high-P tolerant species remains to be determined.
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References
Abbott L K and Robson A D 1982 Infectivity of vesicular-arbuscular mycorrhizal fungi in agricultural soils. Aust. J. Agric. Res. 33, 1049–1059.
Berg M G and Gardner E H 1978 Methods of soil analysis used in the soil testing laboratory at Oregon State University. Oregon State Univ. Agric. Exp. Stn. Special Report No. 321.
Biermann B and Linderman R G 1981 Quantifying vesicular-arbuscular mycorrhizae: a proposed method towards standardization. New phytol. 87, 63–67.
Davis E A, Young J L and Linderman R G 1983 Soil lime level (pH) and VA-Mycorrhiza effects on growth responses of sweetgum seedlings. Soil. Sci. Soc. Am. J. 47, 251–256.
Hayman D S 1981 Influence of soils and fertility on activity and survival of vesiculararbuscular mycorrhizal fungi. Phytopathology 72, 1119–1125.
Hayman D S 1983 The physiology of vesicular-arbuscular endomycorrhizal symbiosis. Can. J. Bot. 61, 944–963.
Kormanik P P, Bryan W C and Shultz R C 1980 Procedure and equipment for staining large numbers of plant root samples for endomycorrhizal assay. Can. J. Microbiol. 26, 536–538.
Phillips J M and Hayman D S 1970 Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular fungi for rapid assessment of infection. Trans. Brit. Mycol. Soc. 55, 158–160.
Powell C L 1977 Mycorrhizas in hill-country soils. I. Spore-bearing mycorrhizal fungi in thirty-seven soils. N. Z. J. Agric. Res. 20, 53–57.
Rose S L and Young J L 1983 VA Mycorrhizae users key. Abstracts, Northwest Scientific Association, 56th Annual Meetings. 24–26 March 1983 Olympia, WA. No. 35.
Russell R S 1977 Plant Root Systems: their Function and Interaction with the soil. McGraw-Hill Book Co., UK. p 49–50.
Saif S R and Khan A G 1975 The influence of season and stage of development of plant onEndogone mycorrhiza of field-grown wheat. Can. J. Microbiol. 21, 1020–1024.
Young J L, Davis E A and Rose S L 1984 Endomycorrhizal fungi in field-grown breeder wheats and triticale cultivars. Agron. J. (Submitted).
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Contribution from the USDA-ARS, Horticultural Crops Research Laboratory and the Dept. of Soil Science, Oregon State University, in cooperation with the Oregon State University Agricultural Experiment Station, Corvallis, OR 97331. Technical paper no. 6979 of the latter
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Davis, E.A., Young, J.L. & Rose, S.L. Detection of high-phosphorus tolerant VAM-fungi colonizing hops and peppermint. Plant Soil 81, 29–36 (1984). https://doi.org/10.1007/BF02206891
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DOI: https://doi.org/10.1007/BF02206891