Variation between Soybean Cultivars in Vesicular-Arbuscular Mycorrhiza Fungi Colonization1
- J. R. Heckman and
- J. S. Angle2
The potential exists for soybean [Glycine max (L.) Merr.] cultivars to be differentially colonized by indigenous soil populations of vesicular-arbuscular mycorrhiza (VAM) fungi. A pot experiment (Typic Palendults) was conducted in a greenhouse to assay the colonization of various soybean cultivars by VAM fungi. Relative colonization of 15 soybean cultivars at two P levels was determined. Individual root systems were compared for the percentage of roots colonized by VAM fungi using an acid fuchsin-lactic acid staining procedure. Colonization was shown to vary significantly with cultivar. The cultivar colonized by the highest percentage was the nonnodulating isoline of Clark rj1 rj1 with 80% of root segments examined being colonized. ‘Williams 82’ exhibited the lowest percentage (57%) of colonization by VAM fungi. The addition of P to the soil reduced the percentage of colonized roots from 68 to 64%, and there was no cultivar ✕ P interaction.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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