Abstract
Inoculation experiments with various viruses were performed with Capsicum annuum L. Plants were used with known cytoplasmic and genotypic characters concerning pollen fertility (Table 1). The results with a set of three F1 hybrids, having identical genotypes for pollen fertility and identical genetic backgrounds, have revealed that it is the cytoplasm which is primarily responsible for the reduction of pollen fertility after infection by specific viruses.Progeny tests have provided more evidence (Tables 2 and 3) indicating that pollen fertility in plants having (S) cytoplasm and Rfrf genotype, and should be pollen fertile, was reduced following infection with specific viruses.It is concluded that a certain interaction between specific viruses and a particular cytoplasm (S) is responsible for the reduced pollen fertility. In other words, the specific cytoplasm (S) modifies the action of Rf-gene by interacting with specific viruses.Since it is evident that a cytoplasmic entity reacts in this way with specific viruses, its nature and origin were discussed, and the following speculation was proposed. A cytoplasmic entity for male sterility in Capsicum could have originated from an exogeneous virus in the course of evolution followed by the loss of infectivity. Then it may be supposed to have arrived at a state of a kind of plasmon or plasmid of RNA nature.
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Claims 4
Claim · model-written summary
Specific virus infection reduced pollen fertility in otherwise fertile plants with (S) cytoplasm and Rfrf genotype.
- Taxon
- Capsicum annuum L.
Capsicum annuumt0 - Material
- (S) cytoplasm and Rfrf genotypee0
- Treatment
- infection with specific virusese0
- Interactor
- specific virusese0pathogen
- Outcome
- pollen fertilitye0
- Direction
- reducede0
- Comparator
- should be pollen fertilee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pollen fertility in plants having (S) cytoplasm and Rfrf genotype, and should be pollen fertile, was reduced following infection with specific viruses”
t0“CAPSICUM ANNUUM L.”
Claim · model-written summary
The authors attributed virus-induced reduction of pollen fertility primarily to the cytoplasm in three F1 hybrids.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Interactor
- specific virusese0pathogen
- Outcome
- reduction of pollen fertilitye0
- Qualifier
- cytoplasme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is the cytoplasm which is primarily responsible for the reduction of pollen fertility after infection by specific viruses”
t0“CAPSICUM ANNUUM L.”
Claim · model-written summary
The authors concluded that (S) cytoplasm modifies Rf-gene action through interaction with specific viruses.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Interactor
- specific virusese0pathogen
- Gene
- Rf-genee0
- Outcome
- action of Rf-genee0
- Qualifier
- specific cytoplasm (S)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the specific cytoplasm (S) modifies the action of Rf-gene by interacting with specific viruses”
t0“CAPSICUM ANNUUM L.”
Claim · model-written summary
The authors speculated that a Capsicum male sterility entity arose from an exogenous virus and later lost infectivity.
CapsicumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A cytoplasmic entity for male sterility in Capsicum could have originated from an exogeneous virus in the course of evolution followed by the loss of infectivity”
The same questions in other papers
infection · yield · Capsicum annuum (sweet pepper)Results agree
1 paper in the same direction as this paper
- no effect
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.