Abstract
summary Experiments were conducted to determine correlation between sporulation by an arbuscular mycorrhizal (AM) fungus to proliferation of arbuscules or intercellular hyphae. Paspalum notatum Flugge seedlings were inoculated with the AM fungus Gigaspora margarita Becker & Hall and treated with either tap water, nutrient solution without P, or nutrient solution with P to manipulate colonization levels. Plants receiving the nutrient solution without P tended to have greater colonization than plants receiving water only (e.g. 62 vs 54%, respectively at week 7) but lesser percentage root length with arbuscules (e.g. 27 vs 38% respectively at week 7). Mycorrhizas receiving the nutrient solution without P sporulated sooner (week 7) than the water only treatment and had larger spore populations (e.g. 20.9 vs 14.2 spores cm −3 at week 13). Nutrient solution with P did not completely inhibit colonization, and though these plants had total colonized root lengths similar to those of the water treatment, spore populations were much less (2.9 cm −3 at week 13), Spore populations correlated equally well with total root length as with root length colonized and root length with arbuscules in the water and nutrient solution without P treatments. Populations were not correlated to these measures for the nutrient solution with P, indicating that the host may have limited the ability of a unit length of colonization to produce spores in this treatment.
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Claims 9
Claim · model-written summary
Nutrient solution without P tended to increase colonization relative to water.
Verbatim
e0“Plants receiving the nutrient solution without P tended to have greater colonization than plants receiving water only (e.g. 62 vs 54%, respectively at week 7)”
Claim · model-written summary
Nutrient solution without P lowered root length with arbuscules relative to water.
Not reportedTaxonTreatmentComparator
Verbatim
e0“but lesser percentage root length with arbuscules (e.g. 27 vs 38% respectively at week 7)”
Claim · model-written summary
Mycorrhizas without P sporulated sooner than water only treatment.
- Treatment
- nutrient solution without Pe0
- Outcome
- sporulatede0
- Direction
- soonere0
- Value
- week 7e0
- Comparator
- water only treatmente0
Not reportedTaxon
Verbatim
e0“Mycorrhizas receiving the nutrient solution without P sporulated sooner (week 7) than the water only treatment”
Claim · model-written summary
Without P, spore populations were larger than with water.
Not reportedTaxonTreatmentComparator
Verbatim
e0“had larger spore populations (e.g. 20.9 vs 14.2 spores cm −3 at week 13)”
Claim · model-written summary
Nutrient solution with P did not completely inhibit colonization.
Not reportedTaxonComparator
Verbatim
e0“Nutrient solution with P did not completely inhibit colonization”
Claim · model-written summary
With P, colonized root lengths resembled the water treatment.
- Taxon
- plantsViridiplantaee0
- Outcome
- total colonized root lengthse0
- Direction
- similare0
- Comparator
- water treatmente0
Not reportedTreatment
Verbatim
e0“these plants had total colonized root lengths similar to those of the water treatment”
Claim · model-written summary
With P, spore populations were much lower at week 13.
Not reportedTaxonTreatmentComparator
Verbatim
e0“spore populations were much less (2.9 cm −3 at week 13)”
Claim · model-written summary
Spore populations correlated with total root length, colonized root length and arbuscule length without P.
Not reportedTaxonDirection
Verbatim
e0“Spore populations correlated equally well with total root length as with root length colonized and root length with arbuscules in the water and nutrient solution without P treatments”
Claim · model-written summary
With P, spore populations did not correlate with those root measures.
Not reportedTaxonDirection
Verbatim
e0“Populations were not correlated to these measures for the nutrient solution with P”
The same questions in other papers
fertilization · disease · Viridiplantae (plants)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.