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- W2149016775 abstract "In a greenhouse experiment, the degree of infectivity as well as effects on shoot hiomass, phosphorus concentration, and drought response in Agropyron smithii Rydb. were compared for species assemblages of vesicular-arbuscular (VA) mycorrhizal fungi. Assemblages were collected from dissimilar soils across a 55 m elevational gradient in the xeric sagebrush-steppe of southwestern Wyoming. Collection sites and soils were designated as ridgetop (RT), midslope (MS), and base (B|. All assemblages of mycorrhizal fungi were tested in their parent soils as well as the other two soils. In the phosphorus (P)-deficient (10 mg kg −1) RT soil, the indigenous mycorrhizal fungi produced significantly greater concentrations of P in the shoot of the host ((0-335 °) than did the fungi from the B site (0-250%). In the non-mycorrhizal plants the concentration of P in the shoot was 0.185%. The RT fungi also generated the highest levels of infection, plus greatest arbuscule and vesicle production in both the RT and MS soils. The B soil had the highest available 1’content (51 mg kg -1) and mean shoot P concentrations were not significantly different among plants of the different treatments grown in this soil. Inefectivity was also reduced in the B soil. This reduction in mycorrhizal activity was attributed to the high-P availability in the H soil. Although shoot dry weight was either unaffected or possibly reduced by mycorrhizas in all soils, stomatal response to drought was not affected by mycorrhizas m any of the soils. The greater effectiveness of the RT inoculum for increasing P concentration in the shoot of A. smithii when grown in the RT soil, as well as the greater infectivity of this inoculum, may indicate adaptation in these mycorrhizal fungi to low-P soil conditions. The relatively low infectivity and effectivity of the B fungi in the RT soil also suggests that these fungi may be less adapted to low-P soil conditions. Thus, differences in ineffectivity and effectivity may occur among native VA mycorrhizal fungi when the parent soils are dissimilar yet contiguous." @default.
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- W2149016775 date "1989-06-01" @default.
- W2149016775 modified "2023-09-25" @default.
- W2149016775 title "Infectivity and effectivity of indigenous vesicular-arbuscular mycorrhizal fungi from contiguous soils in southwestern Wyoming, USA" @default.
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- W2149016775 doi "https://doi.org/10.1111/j.1469-8137.1989.tb02375.x" @default.
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