Abstract
Isolated and interactive effects of angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca) plants. Gas exchange was measured on 37, 44, 51, and 58 d after planting using a portable photosynthesis system. The inoculation of plants with P. griseola (P), U. appendiculatus (U), and the combination of both pathogens (P+U) caused a significant reduction of net photosynthetic rate (PN) and yield. The reduction of stomatal conductance (gs), PN, and yield was higher under P and combination of P+U than under U treatment. By effect of U, the reduction on yield was higher than the reductions on gas exchange parameters. On the treatment P+U, a reduction of 23 % in PN and a correspondent reduction of 32 % in yield was observed. The interactive effects of the pathogens on yield could be explained in part by the decreases in gs and in PN of diseased bean leaves. The combined effect of both diseases on yield and gas exchange parameters suggests an antagonistic interaction.
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Claims 7
Claim · model-written summary
Inoculation with angular leaf spot pathogen significantly reduced net photosynthetic rate and yield of common bean
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise0 - Material
- Cariocae0
- Treatment
- inoculation of plants with P. griseola (P)e1
- Interactor
- Phaeoisariopsis griseola
_Figure_19.jpg?width=60)
Pseudocercospora griseolae0pathogene1 - Outcome
- net photosynthetic rate (PN) and yielde1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_19.jpg?width=500)
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e1“The inoculation of plants with P. griseola (P), U. appendiculatus (U), and the combination of both pathogens (P+U) caused a significant reduction of net photosynthetic rate (PN) and yield”
Claim · model-written summary
Reduction of stomatal conductance, net photosynthesis and yield was higher under angular leaf spot alone and combined infection than under rust alone
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- P and combination of P+Ue2
- Interactor
- Phaeoisariopsis griseolaPseudocercospora griseolae0pathogen
- Second interactor
- Uromyces appendiculatus
.jpg?width=60)
Uromyces appendiculatuse0pathogen - Outcome
- stomatal conductance (gs), PN, and yielde2
- Direction
- highere2
- Comparator
- U treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e2“The reduction of stomatal conductance (gs), PN, and yield was higher under P and combination of P+U than under U treatment”
Claim · model-written summary
Rust alone reduced yield more than it reduced gas exchange parameters
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- Ue3
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse0pathogen
- Outcome
- reduction on yielde3
- Direction
- highere3
- Comparator
- gas exchange parameterse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e3“By effect of U, the reduction on yield was higher than the reductions on gas exchange parameters”
Claim · model-written summary
Combined infection reduced net photosynthetic rate by 23 % in common bean
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- P+Ue4
- Interactor
- Phaeoisariopsis griseolaPseudocercospora griseolae0pathogen
- Second interactor
- Uromyces appendiculatusUromyces appendiculatuse0pathogen
- Outcome
- PNe4
- Direction
- reductione4
- Value
- 23 %e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e4“On the treatment P+U, a reduction of 23 % in PN and a correspondent reduction of 32 % in yield was observed”
Claim · model-written summary
Combined infection reduced yield by 32 % in common bean
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- P+Ue4
- Interactor
- Phaeoisariopsis griseolaPseudocercospora griseolae0pathogen
- Second interactor
- Uromyces appendiculatusUromyces appendiculatuse0pathogen
- Outcome
- yielde4
- Direction
- reductione4
- Value
- 32 %e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e4“On the treatment P+U, a reduction of 23 % in PN and a correspondent reduction of 32 % in yield was observed”
Claim · model-written summary
The combined effect of both diseases on yield and gas exchange suggests an antagonistic interaction
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Treatment
- both diseasese5
- Interactor
- Phaeoisariopsis griseolaPseudocercospora griseolae0pathogen
- Second interactor
- Uromyces appendiculatusUromyces appendiculatuse0pathogen
- Outcome
- yield and gas exchange parameterse5
- Direction
- antagonistice5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e5“The combined effect of both diseases on yield and gas exchange parameters suggests an antagonistic interaction”
Claim · model-written summary
Interactive effects of the two pathogens on yield may be explained in part by decreases in stomatal conductance and net photosynthesis
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Outcome
- yielde6
- Qualifier
- decreases in gs and in PNe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“angular leaf spot (caused by Phaeoisariopsis griseola) and rust (caused by Uromyces appendiculatus) on leaf gas exchange and yield was studied in common bean (Phaseolus vulgaris L. cv. Carioca)”
e6“The interactive effects of the pathogens on yield could be explained in part by the decreases in gs and in PN of diseased bean leaves”
The same questions in other papers
inoculation · physiology: photosynthesis · Phaseolus vulgaris (common bean)Positive and negative results
4 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 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.