Abstract
Abstract The effect of soil pH 4.3, 4.6, and 5.9 on the pathogenicity of Heterodera glycines and Meloidogyne incognita on acid soiladapted soybean genotypes (Davis and PI 416937) was investigated in three glasshouse experiments over 28 days after inoculation with 0 or 1000 (Experiments 1 and 2) and 0 or 5000 (Experiment 3) second-stage juveniles. Although nematodes of both species infected both genotypes at all of the soil pH, the numbers decreased with decreasing soil pH. Both genotypes seem to be better hosts for M. incognita than for H. glycines, Davis more so than PI 416937. Both nematodes decreased shoot weight at high inoculum levels, indicating that H. glycines may be more pathogenic than M. incognita. Nematode development after infection of roots was not affected by soil pH or by genotypes. Overall, the results suggest that adaptation of these nematodes should be considered in breeding programmes to develop low pH tolerant soybean cultivars.
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Claims 9
Claim · model-written summary
Both nematode species infected both soybean genotypes across all tested pH levels.
- Taxon
- Glycine max
Glycine maxt0 - Material
- Davis and PI 416937e1
- Interactor
- Heterodera glycines
Heterodera glycinest0pathogen - Outcome
- infected both genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although nematodes of both species infected both genotypes at all of the soil pH”
e1“soybean genotypes (Davis and PI 416937)”
t0“Heterodera glycines and Meloidogyne incognita on Glycine max genotypes”
Claim · model-written summary
Nematode infection numbers fell as soil pH decreased.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- soil pHt0
- Outcome
- numberse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the numbers decreased with decreasing soil pH”
t0“soil pH on the pathogenesis of Heterodera glycines and Meloidogyne incognita on Glycine max genotypes”
Claim · model-written summary
Both genotypes appeared better hosts for M. incognita than H. glycines.
- Taxon
- Glycine maxGlycine maxt0
- Material
- Davise0
- Interactor
- M. incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pathogen - Second interactor
- H. glycinesHeterodera glycinese0pathogen
- Outcome
- better hosts for M. incognita than for H. glycinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“Both genotypes seem to be better hosts for M. incognita than for H. glycines, Davis more so than PI 416937”
t0“Glycine max genotypes”
Claim · model-written summary
Davis was a better host relative to PI 416937.
- Taxon
- Glycine maxGlycine maxt0
- Material
- Davise0
- Outcome
- more soe0
- Comparator
- PI 416937e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Davis more so than PI 416937”
t0“Glycine max genotypes”
Claim · model-written summary
High inocula of both nematodes decreased soybean shoot weight.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- high inoculum levelse0
- Interactor
- Heterodera glycinesHeterodera glycinest0pathogen
- Outcome
- shoot weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both nematodes decreased shoot weight at high inoculum levels”
t0“Heterodera glycines and Meloidogyne incognita on Glycine max genotypes”
Claim · model-written summary
H. glycines may be more pathogenic than M. incognita.
- Taxon
- Glycine maxGlycine maxt0
- Interactor
- H. glycinesHeterodera glycinese0pathogen
- Second interactor
- M. incognitaMeloidogyne incognitae0pathogen
- Outcome
- more pathogenice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating that H. glycines may be more pathogenic than M. incognita”
t0“Glycine max genotypes”
Claim · model-written summary
Soil pH did not affect nematode development after root infection.
- Taxon
- Glycine maxGlycine maxt0
- Treatment
- soil pHe0
- Outcome
- Nematode development after infection of rootse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematode development after infection of roots was not affected by soil pH or by genotypes”
t0“Glycine max genotypes”
Claim · model-written summary
Soybean genotype did not affect nematode development after infection.
- Taxon
- Glycine maxGlycine maxt0
- Material
- genotypese0
- Outcome
- Nematode development after infection of rootse0
- Direction
- not affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematode development after infection of roots was not affected by soil pH or by genotypes”
t0“Glycine max genotypes”
Claim · model-written summary
Breeding low pH tolerant soybean should consider nematode adaptation.
- Taxon
- soybeanGlycine maxe0
- Outcome
- adaptation of these nematodes should be considered in breeding programmese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adaptation of these nematodes should be considered in breeding programmes to develop low pH tolerant soybean cultivars”
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See all 34 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.