Abstract
We examined the responses of the photosynthetic and respiratory electron transport and antioxidant systems in cell organelles of cucumber (Cucumis sativus L.) and tomato (Lycopersicon esculentum Mill.) leaves to infection of cucumber mosaic virus (CMV) by comparing the gas exchange, Chl fluorescence, respiratory electron transport, superoxide dismutase (SOD, EC 1.15.1.1) and ascorbate-glutathione (AsA-GSH) cycle enzymes and the production of H(2)O(2) in chloroplasts, mitochondria and soluble fraction in virus-infected and non-infected leaves. Long-term CMV infection resulted in decreased photosynthesis and respiration rates. Photosynthetic electron flux to carbon reduction, respiratory electron transport via both complex I and complex II and also the Cyt respiration rate all significantly decreased, while photosynthetic alternative electron flux and alternative respiration significantly increased. These changes in electron transport were accompanied by a general increase in the activities of SOD/AsA-GSH cycle enzymes followed by an increased H(2)O(2) accumulation in chloroplasts and mitochondria. These results demonstrated that disturbance of photosynthetic and respiratory electron transport by CMV also affected the antioxidative systems, thereby leading to oxidative stress in various organelles.
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Claims 8
Claim · model-written summary
Long-term CMV infection decreased photosynthesis and respiration rates in cucumber and tomato leaves.
- Taxon
- cucumber and tomato
Cucumis sativus
Solanum lycopersicumt0 - Treatment
- CMV infectione0
- Interactor
- cucumber mosaic virus
cucumber mosaic cucumoviruse1pathogen - Outcome
- photosynthesis and respiration ratese0
- Direction
- decreasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Long-term CMV infection resulted in decreased photosynthesis and respiration rates.”
t0“cucumber and tomato leaves”
e1“cucumber mosaic virus (CMV)”
e2“virus-infected and non-infected leaves”
Claim · model-written summary
CMV infection significantly decreased photosynthetic electron flux to carbon reduction.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- Photosynthetic electron flux to carbon reductione0
- Direction
- decreasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic electron flux to carbon reduction, respiratory electron transport via both complex I and complex II and also the Cyt respiration rate all significantly decreased”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV infection significantly decreased respiratory electron transport through complexes I and II.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- respiratory electron transport via both complex I and complex IIe0
- Direction
- decreasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“respiratory electron transport via both complex I and complex II and also the Cyt respiration rate all significantly decreased”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV infection significantly decreased Cyt respiration rate.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- Cyt respiration ratee0
- Direction
- decreasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cyt respiration rate all significantly decreased”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV infection significantly increased alternative photosynthetic electron flux and respiration.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- photosynthetic alternative electron flux and alternative respiratione0
- Direction
- increasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic alternative electron flux and alternative respiration significantly increased.”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV infection generally increased SOD and AsA-GSH cycle enzyme activities.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- activities of SOD/AsA-GSH cycle enzymese0
- Direction
- increasee0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a general increase in the activities of SOD/AsA-GSH cycle enzymes”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV infection increased H(2)O(2) accumulation in chloroplasts and mitochondria.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Organ / stage
- chloroplasts and mitochondriae0
- Treatment
- CMV infectione1
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse3pathogen
- Outcome
- H(2)O(2) accumulatione0
- Direction
- increasede0
- Comparator
- non-infected leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased H(2)O(2) accumulation in chloroplasts and mitochondria.”
t0“cucumber and tomato leaves”
e1“CMV infection”
e2“virus-infected and non-infected leaves”
e3“cucumber mosaic virus (CMV)”
Claim · model-written summary
Authors infer that CMV-disturbed electron transport affects antioxidant systems and leads to organelle oxidative stress.
- Taxon
- cucumber and tomatoCucumis sativusSolanum lycopersicumt0
- Interactor
- cucumber mosaic viruscucumber mosaic cucumoviruse1pathogen
- Outcome
- oxidative stress in various organellese0
- Qualifier
- disturbance of photosynthetic and respiratory electron transporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“disturbance of photosynthetic and respiratory electron transport by CMV also affected the antioxidative systems, thereby leading to oxidative stress in various organelles.”
t0“cucumber and tomato leaves”
e1“cucumber mosaic virus (CMV)”
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See all 7 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.