Abstract
One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant and grown under controlled conditions (21°C, 14 h day at 400 μE.m-2.s-1, 16°C, 10 h night cycle). At intervals up to 28 d after inoculation, morphological and physiological characteristics of the bean plants were measured using destructive and nondestructive assays. Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two. Chlorophyll content and photosynthetic rate for all treatments decreased with time. The interaction between the physiological and chronological age of the nematode and host in relation to the diminished productivity of infected plants is discussed.
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Claims 8
Claim · model-written summary
Nematode inoculation significantly decreased total carbon, hydrogen and nitrogen content from day 8.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise1 - Treatment
- inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plante1
- Interactor
- Meloidogyne incognita
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Meloidogyne incognitae1pest - Outcome
- total carbon, hydrogen, and nitrogen contente0
- Direction
- decreasede0
- Qualifier
- from 8 de0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Nematodes significantly decreased plant dry weight from day 8.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plante1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- plant dry weighte0
- Direction
- decreasede0
- Qualifier
- from 8 de0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Nematodes decreased flowers, pods and seeds after day 15.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plante1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- flowers, pods, seedse0
- Direction
- decreasede2
- Qualifier
- after 15 de0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flowers, pods, seeds and leaf area after 15 d”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Nematodes decreased leaf area after day 15.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plante1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- leaf areae0
- Direction
- decreasede2
- Qualifier
- after 15 de0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flowers, pods, seeds and leaf area after 15 d”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Nematode infection did not significantly change plant respiration rate.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- nematode infectione0
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- Plant respiration ratee0
- Direction
- not significantly changede0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant respiration rate was not significantly changed by nematode infection”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Photosynthetic rate decreased within one week of infection.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- nematode infectione2
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
- Qualifier
- within one wke0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Chlorophyll content decreased within two weeks of infection.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- nematode infectione2
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae1pest
- Outcome
- chlorophyll contente0
- Direction
- decreasede2
- Qualifier
- within twoe0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll content within two”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
Claim · model-written summary
Chlorophyll content and photosynthetic rate declined over time in all treatments.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- all treatmentse0
- Outcome
- Chlorophyll content and photosynthetic ratee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content and photosynthetic rate for all treatments decreased with time”
e1“One week-old Phaseolus vulgaris plants were inoculated with 0, 2000, 4000 & 8000 Meloidogyne incognita juveniles/plant”
e2“Nematodes significantly decreased total carbon, hydrogen, and nitrogen content, and plant dry weight from 8 d, and flowers, pods, seeds and leaf area after 15 d. Plant respiration rate was not significantly changed by nematode infection, but photosynthetic rate, based on leaf area and/or chlorophyll and nitrogen content decreased within one wk and chlorophyll content within two.”
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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.