Abstract
The survival and rate of growth of nymphs of Myzus persicae and Macrosiphum euphorbiae were adversely affected by ingestion of cystatins in artificial diet assays. Prolonged exposure to cystatins in diets produced a reduction in the rate of development, survival time and fecundity of M. persicae adults. However, when aphids were caged on transgenic potato expressing chicken egg white cystatin (CEWc) there was no adverse effect on aphid fitness. Similarly, there were no significant differences in field populations of aphids between control and CEWc-expressing potato grown under field conditions, although the levels of expression were sufficient to provide control of potato cyst nematodes. The results highlight that tissue-specific levels of expression are important in determining the effects of cystatins on different invertebrates and it is suggested that aphids feeding on transgenic plants may provide a route via which various natural enemies are exposed to cystatins.
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Claims 8
Claim · model-written summary
Cystatins in artificial diet adversely affected Myzus persicae nymph survival and growth.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- ingestion of cystatinse0
- Interactor
- Myzus persicae
Myzus persicaee0pest - Outcome
- survival and rate of growth of nymphs of Myzus persicaee0
- Direction
- adversely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The survival and rate of growth of nymphs of Myzus persicae and Macrosiphum euphorbiae were adversely affected by ingestion of cystatins in artificial diet assays.”
t0“potato”
Claim · model-written summary
Cystatins in artificial diet adversely affected Macrosiphum euphorbiae nymph survival and growth.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ingestion of cystatinse0
- Interactor
- Macrosiphum euphorbiae
Macrosiphum euphorbiaee0pest - Outcome
- survival and rate of growth of nymphse0
- Direction
- adversely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The survival and rate of growth of nymphs of Myzus persicae and Macrosiphum euphorbiae were adversely affected by ingestion of cystatins in artificial diet assays.”
t0“potato”
Claim · model-written summary
Prolonged dietary cystatin exposure reduced M. persicae adult development rate, survival time and fecundity.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Prolonged exposure to cystatins in dietse0
- Interactor
- M. persicaeMyzus persicaee0pest
- Outcome
- rate of development, survival time and fecundity of M. persicae adultse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prolonged exposure to cystatins in diets produced a reduction in the rate of development, survival time and fecundity of M. persicae adults.”
t0“potato”
Claim · model-written summary
Aphids caged on CEWc-expressing potato showed no adverse effect on fitness.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- transgenic potato expressing chicken egg white cystatin (CEWc)e0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- aphid fitnesse0
- Direction
- no adverse effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when aphids were caged on transgenic potato expressing chicken egg white cystatin (CEWc) there was no adverse effect on aphid fitness.”
Claim · model-written summary
Field aphid populations did not differ significantly between control and CEWc-expressing potato.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- CEWc-expressing potatoe0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- field populations of aphidse0
- Direction
- no significant differencese0
- Comparator
- controle0
- Setting
- field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no significant differences in field populations of aphids between control and CEWc-expressing potato grown under field conditions”
Claim · model-written summary
CEWc expression levels provided control of potato cyst nematodes.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- levels of expressione0
- Interactor
- potato cyst nematodese0pest
- Outcome
- control of potato cyst nematodese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the levels of expression were sufficient to provide control of potato cyst nematodes.”
t0“potato”
Claim · model-written summary
The authors infer tissue-specific expression levels determine cystatin effects on different invertebrates.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- effects of cystatins on different invertebratese0
- Qualifier
- tissue-specific levels of expressione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue-specific levels of expression are important in determining the effects of cystatins on different invertebrates”
t0“potato”
Claim · model-written summary
The authors suggest aphids on transgenic plants may expose natural enemies to cystatins.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- aphidsAphidomorphae0pest
- Second interactor
- natural enemiese0biocontrol_agent
- Outcome
- various natural enemies are exposed to cystatinse0
- Qualifier
- aphids feeding on transgenic plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aphids feeding on transgenic plants may provide a route via which various natural enemies are exposed to cystatins.”
t0“potato”
The same questions in other papers
transgenic · Aphidomorpha · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- 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.