The greatest difference in health between two groups of plants of the same species, one group with mycorrhizae and one group without mycorrhizae, would be in an environment in which the soil is relatively deficient in mineral nutrients.
How do differentiate between mycorrhizae and one group without mycorrhizae?
- In mycorrhizal roots, separate active colonization zones (infection units) roots seldom combine and can be clearly identified by histochemical labeling of fungal succinate dehydrogenase activity (vital staining).
- Mycorrhizal fungi are present in the majority of mineral soils, but frequently at levels that are insufficient for effective colonization.
- This is particularly true in areas with depleted soils, such as newly planted gardens, tilled fields, overworked landscapes, and vacant ground for new home developments.
- When the soil is significantly poor in mineral nutrients, the health of two groups of the same type of plants—one with mycorrhizae and the other without—will differ most.
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