Abstract
BACKGROUND: The present investigation aimed to evaluate the role of Plant Growth- Promoting Rhizobacteria (PGPR) and Ag-nanoparticles on two varieties (American variety, Poinsett 76 and Desi variety, Sialkot selection) of cucumber plants. METHODS: Cucumber seeds prior to sowing, were inoculated with two strains of PGPR, Pseudomonas putida (KX574857) and Pseudomonas stutzeri (KX574858) at the rate of 106 cells/ml. Agnanoparticles (5ppm) were sprayed on the plant at early vegetative phase 27 d after sowing. RESULTS: The proline, sugar, protein, phenolics, flavonoids, chlorophyll and carotenoids contents of leaves of plants and the activities of Phenylalanine Ammonia-Lyase (PAL), Superoxide Dismutase (SOD) and Catalase (CAT) were determined from leaves of plants at early vegetative phase. After 3 months of seeds sowing, Ag-nanoparticles enhanced the length of root but decreased the length of shoot and fresh weight of root and shoot as compared to control whereas, the leaf protein, proline, phenolics, flavonoids, chlorophyll b, total chlorophyll, sugar and Phenylalanine Ammonia-Lyase (PAL) activity of plants were increased significantly over control. Ag-nanoparticles also suppressed the effect of PGPR for root, shoot length but augmented the protein and phenolics contents of leaves of both the varieties. CONCLUSION: The combined treatment of Ag-nanoparticles and PGPR enhanced flavonoids content of leaves and the activities of PAL, SOD and CAT in leaves of plants over control. Agnanoparticles effectively increased the Phenylalanine Ammonia-Lyase (PAL), Catalase (CAT) and superoxide dismutase (SOD) activities in leaves of both the varieties. Pseudomonas putida may be used either alone or in combination with Ag-nanoparticles to enhance the antioxidant and defense enzyme activities. Hence, the plant can tolerate the diseases and stresses in a much better way with higher protein and phenolics content.
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Claims 9
Claim · model-written summary
Silver nanoparticles increased cucumber root length after three months.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- Ag-nanoparticlese0
- Outcome
- length of roote0
- Direction
- enhancede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ag-nanoparticles enhanced the length of root but decreased the length of shoot and fresh weight of root and shoot as compared to control”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles decreased cucumber shoot length and root and shoot fresh weight.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese0
- Outcome
- length of shoot and fresh weight of root and shoote0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ag-nanoparticles enhanced the length of root but decreased the length of shoot and fresh weight of root and shoot as compared to control”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles significantly increased cucumber leaf protein, proline and phenolics.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese1
- Outcome
- leaf protein, proline, phenolicse0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf protein, proline, phenolics, flavonoids, chlorophyll b, total chlorophyll, sugar and Phenylalanine Ammonia-Lyase (PAL) activity of plants were increased significantly over control.”
e1“Ag-nanoparticles also suppressed”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles significantly increased cucumber leaf flavonoids, chlorophyll b and total chlorophyll.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese1
- Outcome
- flavonoids, chlorophyll b, total chlorophylle0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flavonoids, chlorophyll b, total chlorophyll, sugar and Phenylalanine Ammonia-Lyase (PAL) activity of plants were increased significantly over control.”
e1“Ag-nanoparticles also suppressed”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles significantly increased cucumber leaf sugar and PAL activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese1
- Outcome
- sugar and Phenylalanine Ammonia-Lyase (PAL) activitye0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugar and Phenylalanine Ammonia-Lyase (PAL) activity of plants were increased significantly over control.”
e1“Ag-nanoparticles also suppressed”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles suppressed PGPR effects on cucumber root and shoot length.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese0
- Interactor
- PGPRe0symbiont
- Outcome
- root, shoot lengthe0
- Direction
- suppressede0
- Comparator
- PGPRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ag-nanoparticles also suppressed the effect of PGPR for root, shoot length but augmented the protein and phenolics contents of leaves of both the varieties.”
t0“Cucumber”
Claim · model-written summary
Silver nanoparticles augmented leaf protein and phenolics in both cucumber varieties with PGPR.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ag-nanoparticlese0
- Interactor
- PGPRe0symbiont
- Outcome
- protein and phenolics contents of leavese0
- Direction
- augmentede0
- Comparator
- PGPRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ag-nanoparticles also suppressed the effect of PGPR for root, shoot length but augmented the protein and phenolics contents of leaves of both the varieties.”
t0“Cucumber”
Claim · model-written summary
Combined nanoparticles and PGPR increased cucumber leaf flavonoids and PAL, SOD and CAT activities versus control.
- Taxon
- CucumberCucumis sativust0
- Treatment
- combined treatment of Ag-nanoparticles and PGPRe0
- Interactor
- PGPRe0symbiont
- Outcome
- flavonoids content of leaves and the activities of PAL, SOD and CATe0
- Direction
- enhancede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined treatment of Ag-nanoparticles and PGPR enhanced flavonoids content of leaves and the activities of PAL, SOD and CAT in leaves of plants over control.”
t0“Cucumber”
Claim · model-written summary
Pseudomonas putida was recommended alone or with nanoparticles to enhance antioxidant and defense enzyme activities.
- Taxon
- CucumberCucumis sativust0
- Interactor
- Pseudomonas putida
Pseudomonas putidae0symbiont - Outcome
- enhance the antioxidant and defense enzyme activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas putida may be used either alone or in combination with Ag-nanoparticles to enhance the antioxidant and defense enzyme activities.”
t0“Cucumber”
The same questions in other papers
inoculation · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Results agree
21 papers in the same direction as this paper
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See all 22 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.