Abstract
A series of hydroponics experiments were performed in a controlled rice-Magnaporthe grisea pathosystem to study the effects of silicon(Si) on disease development,plant growth,activities of peroxidase(POD),polyphenoloxidase (PPO) and phenylalanine ammonia-lyase(PAL).Si application significantly decreased rice blast incidence and severity index,with control efficiency of 60.59%.Shoot dry weight of rice plants amended with 1.7 mmol/L Si was significantly higher than that of the non-Si-amended plants by 10 d after inoculation with M.grisea.However,No significant difference was observed in root dry weight between the Si+(with Si added) and Si-(without Si added) treatments.Application of silicon was beneficial for rice growth and alleviated damage resulting from infection by M.grisea.POD activity increased after inoculation and reached a maximum by 5 d.POD activity in leaves of Si+plants was significantly lower than that of Si-plants after inoculation.The result showed that the change of POD activity was not directly related to rice blast resistance,but might be directly related to damage degree of rice leaves infected by M.grisea.PPO activity in Si+ and Si-rice plants both slowly increased after inoculation and had a peak by 5 d.PPO activity in leaves of Si+ plants was significantly higher than in Si-plants from 4 d and onward.PAL activity in Si+ and Si- rice plants rapidly increased after inoculation and had a peak by 24 h,thereafter began to decline.However,PAL activity in Si+ plants was 1.44-fold higher than in Si-plants.It is hypothesized that silicon can mediate activities of key defense enzymes to induce some natural defense responses in rice and play an active and physiological role in enhancing resistance to rice blast.
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Claims 12
Claim · model-written summary
Si application significantly decreased rice blast incidence and severity index in the rice-Magnaporthe grisea pathosystem, with a control efficiency of 60.59%.
- Taxon
- rice
Oryza sativae0 - Treatment
- Si applicatione0
- Interactor
- Magnaporthe grisea
Pyricularia griseat0pathogen - Outcome
- rice blast incidence and severity indexe0
- Direction
- decreasede0
- Value
- 60.59%e0
- Qualifier
- control efficiencye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application significantly decreased rice blast incidence and severity index,with control efficiency of 60.59%”
t0“Magnaporthe grisea”
Claim · model-written summary
Rice plants amended with 1.7 mmol/L Si had significantly higher shoot dry weight than non-Si-amended plants by 10 d after inoculation with M.grisea.
- Taxon
- riceOryza sativae0
- Treatment
- 1.7 mmol/L Sie0
- Interactor
- M.griseaPyricularia griseae0pathogen
- Outcome
- Shoot dry weighte0
- Direction
- highere0
- Qualifier
- by 10 d after inoculatione0
- Comparator
- non-Si-amended plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight of rice plants amended with 1.7 mmol/L Si was significantly higher than that of the non-Si-amended plants by 10 d after inoculation with M.grisea”
Claim · model-written summary
No significant difference in root dry weight was observed between Si-added and no-Si treatments of rice.
- Taxon
- riceOryza sativat1
- Treatment
- Si+(with Si added)e0
- Outcome
- root dry weighte0
- Direction
- no_changeinferrede0
- Comparator
- Si-(without Si added)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant difference was observed in root dry weight between the Si+(with Si added) and Si-(without Si added) treatments”
t1“rice leaves”
Claim · model-written summary
POD activity in rice leaves increased after inoculation and reached a maximum by 5 d.
- Taxon
- riceOryza sativat1
- Outcome
- POD activitye0
- Direction
- increasede0
- Qualifier
- reached a maximum by 5 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity increased after inoculation and reached a maximum by 5 d”
t1“rice leaves”
Claim · model-written summary
After inoculation, POD activity in leaves of Si+ rice plants was significantly lower than in Si- plants.
- Taxon
- riceOryza sativat1
- Organ / stage
- leavese0
- Treatment
- Si+plantse0
- Outcome
- POD activitye0
- Direction
- lowere0
- Comparator
- Si-plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity in leaves of Si+plants was significantly lower than that of Si-plants after inoculation”
t1“rice leaves”
Claim · model-written summary
The authors conclude that the change in POD activity was not directly related to rice blast resistance but might be directly related to the damage degree of leaves infected by M.grisea.
- Taxon
- riceOryza sativae0
- Interactor
- M.griseaPyricularia griseae0pathogen
- Outcome
- rice blast resistancee0
- Qualifier
- the change of POD activitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the change of POD activity was not directly related to rice blast resistance,but might be directly related to damage degree of rice leaves infected by M.grisea”
Claim · model-written summary
PPO activity in leaves of Si+ rice plants was significantly higher than in Si- plants from 4 d after inoculation onward.
- Taxon
- riceOryza sativat1
- Organ / stage
- leavese0
- Treatment
- Si+ plantse0
- Outcome
- PPO activitye0
- Direction
- highere0
- Qualifier
- from 4 d and onwarde0
- Comparator
- Si-plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PPO activity in leaves of Si+ plants was significantly higher than in Si-plants from 4 d and onward”
t1“rice leaves”
Claim · model-written summary
PPO activity in both Si+ and Si- rice plants increased slowly after inoculation and peaked by 5 d.
- Taxon
- riceOryza sativae0
- Outcome
- PPO activitye0
- Direction
- increasede0
- Qualifier
- had a peak by 5 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PPO activity in Si+ and Si-rice plants both slowly increased after inoculation and had a peak by 5 d”
Claim · model-written summary
PAL activity in both Si+ and Si- rice plants increased rapidly after inoculation, peaked by 24 h, and then began to decline.
- Taxon
- riceOryza sativae0
- Outcome
- PAL activitye0
- Direction
- increasede0
- Qualifier
- thereafter began to declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PAL activity in Si+ and Si- rice plants rapidly increased after inoculation and had a peak by 24 h,thereafter began to decline”
Claim · model-written summary
PAL activity in Si+ rice plants was 1.44-fold higher than in Si- plants.
- Taxon
- riceOryza sativat1
- Treatment
- Si+ plantse0
- Outcome
- PAL activitye0
- Direction
- highere0
- Value
- 1.44-folde0
- Comparator
- Si-plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PAL activity in Si+ plants was 1.44-fold higher than in Si-plants”
t1“rice leaves”
Claim · model-written summary
Application of silicon was beneficial for rice growth and alleviated the damage resulting from infection by M.grisea.
- Taxon
- riceOryza sativae0
- Treatment
- Application of silicone0
- Interactor
- M.griseaPyricularia griseae0pathogen
- Outcome
- damage resulting from infection by M.griseae0
- Direction
- alleviatede0
- Qualifier
- beneficial for rice growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of silicon was beneficial for rice growth and alleviated damage resulting from infection by M.grisea”
Claim · model-written summary
It is hypothesized that silicon mediates activities of key defense enzymes to induce natural defense responses in rice and so enhances resistance to rice blast.
- Taxon
- riceOryza sativae0
- Treatment
- silicone0
- Outcome
- resistance to rice blaste0
- Qualifier
- mediate activities of key defense enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicon can mediate activities of key defense enzymes to induce some natural defense responses in rice and play an active and physiological role in enhancing resistance to rice blast”
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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.