Abstract
We planted rice plant (Oryza sativa, var. IR 64) with inoculation of Azotobacter vinellandii (SRI Az3) and examined its potency to protect plant from drought stress. We found that it secretes plant growth promoting substances such as IAA, gibberellins, zeatin which helps plant in abiotic stress like drought. The bacteria Azotobacter vinellandii (SRI Az3) significantly promotes the development of root branching, root hairs and primary and secondary lateral roots would increase due to the growth hormones secreted by the Azotobacter spp. along with nitrogen fixation. Agronomic parameters of plants inoculated with Azotobacter vinellandii (SRI Az3) [T4], were studied and compared with rice plants of different treatments [T1, T2 and T3] after drought stress conditions. Endogenous levels of soluble sugar and hormone (GA3, zeatin and IAA) contents were higher in the T4 plants after drought stress condition. The photosynthetic characteristics such as net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 (Ci), chlorophyll (Chl) content were significantly higher in T4 after drought stress as compared with plants of other treatments. The activities of antioxidant enzyme viz. malondialdehyde (MDA) and proline content were significantly higher in T4 as compared with plants of other treatments after drought stress. The higher assimilation of endogenous nutrient like nitrogen, potassium, phosphorus, were found as compared to other plants during stress.
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Claims 7
Claim · model-written summary
Azotobacter secreted IAA, gibberellins and zeatin.
- Taxon
- rice plant
Oryza sativat0 - Interactor
- Azotobacter vinellandii (SRI Az3)t1symbiont
- Outcome
- plant growth promoting substances such as IAA, gibberellins, zeatine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it secretes plant growth promoting substances such as IAA, gibberellins, zeatin”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
Azotobacter significantly promoted rice root branching, hairs, and lateral roots.
- Taxon
- rice plantOryza sativat0
- Treatment
- inoculation of Azotobacter vinellandii (SRI Az3)t1
- Interactor
- Azotobacter vinellandii (SRI Az3)e0symbiont
- Outcome
- development of root branching, root hairs and primary and secondary lateral rootse0
- Direction
- promotese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The bacteria Azotobacter vinellandii (SRI Az3) significantly promotes the development of root branching, root hairs and primary and secondary lateral roots”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
After drought, inoculated T4 rice had higher soluble sugar and hormone contents than other treatments.
- Taxon
- rice plantOryza sativat0
- Treatment
- T4e0
- Interactor
- Azotobacter vinellandii (SRI Az3)e1symbiont
- Outcome
- soluble sugar and hormone (GA3, zeatin and IAA) contentse0
- Direction
- highere0
- Qualifier
- after drought stress conditione0
- Comparator
- T1, T2 and T3t1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Endogenous levels of soluble sugar and hormone (GA3, zeatin and IAA) contents were higher in the T4 plants after drought stress condition.”
t0“to rice plant increases stress tolerance”
t1“T1, T2 and T3”
e1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
After drought, T4 rice had significantly higher photosynthetic rate, stomatal conductance, intercellular CO2 and chlorophyll than other treatments.
- Taxon
- rice plantOryza sativat0
- Treatment
- T4e0
- Interactor
- Azotobacter vinellandii (SRI Az3)t1symbiont
- Outcome
- net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 (Ci)e0
- Direction
- highere0
- Comparator
- plants of other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic characteristics such as net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 (Ci), chlorophyll (Chl) content were significantly higher in T4 after drought stress as compared with plants of other treatments.”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
After drought, T4 rice had significantly higher chlorophyll content than other treatments.
- Taxon
- rice plantOryza sativat0
- Treatment
- T4e0
- Interactor
- Azotobacter vinellandii (SRI Az3)t1symbiont
- Outcome
- chlorophyll (Chl) contente0
- Direction
- highere0
- Comparator
- plants of other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll (Chl) content were significantly higher in T4 after drought stress as compared with plants of other treatments.”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
After drought, T4 rice had significantly higher malondialdehyde and proline content.
- Taxon
- rice plantOryza sativat0
- Treatment
- T4e0
- Interactor
- Azotobacter vinellandii (SRI Az3)t1symbiont
- Outcome
- malondialdehyde (MDA) and proline contente0
- Direction
- highere0
- Comparator
- plants of other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of antioxidant enzyme viz. malondialdehyde (MDA) and proline content were significantly higher in T4 as compared with plants of other treatments after drought stress.”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
Claim · model-written summary
During drought, T4 rice assimilated more nitrogen, potassium and phosphorus than other plants.
- Taxon
- rice plantOryza sativat0
- Treatment
- inoculation of Azotobacter vinellandii (SRI Az3)t1
- Interactor
- Azotobacter vinellandii (SRI Az3)t1symbiont
- Outcome
- assimilation of endogenous nutrient like nitrogen, potassium, phosphoruse0
- Direction
- highere0
- Comparator
- other plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher assimilation of endogenous nutrient like nitrogen, potassium, phosphorus, were found as compared to other plants during stress.”
t0“to rice plant increases stress tolerance”
t1“inoculation of Azotobacter vinellandii (SRI Az3)”
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