Abstract
A study was conducted at Universiti Putra Malaysia, Malaysia, glasshouse to determine the inoculation effect of Sb42 (locally isolated diazotroph) with different doses of nitrogen fertiliser (0, 30 and 60kg N ha-1) on hydrolytic enzyme production and the growth of rice variety MR219. Using 16S rRNA partial gene sequencing, Sb42 was identified as Bacillus sp. Plants were harvested at 45 days after transplanting, and specific enzyme activities of endoglucanase (EG) and endopolymethylgalacturonase (EPMG) were determined. Results showed that the growth of rice and hydrolytic enzymes production were significantly (P<0.05) affected by bacterial inoculation and N application. The application of N at concentrations of 30 and 60kg ha-1 to inoculated plants reduced plant growth and specific enzyme activities. Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments. Root colonisation was observed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), which proved that Sb42 is able to colonise at the surface and interior of roots. The ability of Sb42 to produce hydrolytic enzymes and biological nitrogen fixation was affected by the application of N fertiliser.
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Claims 12
Claim · model-written summary
Sb42 was identified as Bacillus sp.
- Taxon
- rice
Oryza sativat0 - Interactor
- Bacillus sp.e0symbiont
- Outcome
- identified as Bacillus sp.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using 16S rRNA partial gene sequencing, Sb42 was identified as Bacillus sp.”
t0“rice”
Claim · model-written summary
Inoculation and N application significantly affected rice growth and hydrolytic enzyme production.
- Taxon
- riceOryza sativae0
- Treatment
- bacterial inoculation and N applicatione0
- Outcome
- growth of rice and hydrolytic enzymes productione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of rice and hydrolytic enzymes production were significantly (P<0.05) affected by bacterial inoculation and N application”
Claim · model-written summary
N applied to inoculated rice reduced growth.
- Taxon
- riceOryza sativat0
- Treatment
- N at concentrations of 30 and 60kg ha-1e0
- Outcome
- plant growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N at concentrations of 30 and 60kg ha-1 to inoculated plants reduced plant growth and specific enzyme activities”
t0“rice”
Claim · model-written summary
N applied to inoculated rice reduced specific enzyme activity.
- Taxon
- riceOryza sativat0
- Treatment
- N at concentrations of 30 and 60kg ha-1e0
- Outcome
- specific enzyme activitiese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N at concentrations of 30 and 60kg ha-1 to inoculated plants reduced plant growth and specific enzyme activities”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher EG activity than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- EGe0
- Direction
- highere0
- Value
- 88.9%e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher EPMG activity than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- EPMGe0
- Direction
- highere0
- Value
- 20.1%e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher biomass than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- plant biomasse0
- Direction
- highere0
- Value
- 72.46%e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher photosynthesis than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- rate of photosynthesise0
- Direction
- highere0
- Value
- 9.38μmolCO2m2s-1e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher leaf N content than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- leaf N contente0
- Direction
- highere0
- Value
- 3.16%e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Without N application, inoculated rice had higher N uptake than non-inoculated rice.
- Taxon
- riceOryza sativat0
- Treatment
- Inoculated plants without N applicatione0
- Outcome
- N uptakee0
- Direction
- highere0
- Value
- 74.59mg plant-1e0
- Comparator
- non-inoculated treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculated plants without N application showed significantly higher (P<0.05) specific hydrolytic enzyme activity (88.9% EG and 20.1% EPMG), plant biomass (72.46%), rate of photosynthesis (9.38μmolCO2m2s-1), leaf N content (3.16%) and N uptake (74.59mg plant-1) compared to non-inoculated treatments”
t0“rice”
Claim · model-written summary
Sb42 colonized rice root surfaces and interiors.
- Taxon
- riceOryza sativat0
- Interactor
- Sb42e0symbiont
- Outcome
- colonise at the surface and interior of rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sb42 is able to colonise at the surface and interior of roots”
t0“rice”
Claim · model-written summary
N fertilizer affected Sb42 hydrolytic enzyme production and nitrogen fixation.
- Taxon
- riceOryza sativat0
- Treatment
- application of N fertilisere0
- Interactor
- Sb42e0symbiont
- Outcome
- ability of Sb42 to produce hydrolytic enzymes and biological nitrogen fixatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ability of Sb42 to produce hydrolytic enzymes and biological nitrogen fixation was affected by the application of N fertiliser”
t0“rice”
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