Abstract
The effect of arbuscular mycorrhizal fungi (AMF) on antioxidative system in drought tolerant (WH 1025) and drought susceptible (WH 1105) wheat varieties was investigated in screen house under control and stress conditions. Mycorrhizal and non-mycorrhizal wheat (Triticum aestivum L.) plants were subjected to water stress by withholding irrigation at different stages of plant growth (i.e. jointing and heading stages). The antioxidant and antioxidative enzymes were estimated in leaves of water stressed and control plants. It was found that drought tolerant and drought susceptible varieties showed different response under drought conditions. Variety WH 1105 suffered greater damage to cellular membrane due to high level of reactive oxygen species (ROS) as indicated by superoxide radical (O.-), hydrogen peroxide (H2O2) and malondialdehyde (MDA) content under stress conditions. Antioxidative enzymes viz. superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT) and peroxidase (POX) were higher in drought tolerant variety. Antioxidative metabolites viz. ascorbic acid and glutathione content was increased in both tolerant and susceptible variety under water stress but with higher magnitude in WH 1025 than WH 1105. Results showed that under water stress conditions, mycorrhizal inoculation significantly decreased the O2 .-, H2O2, and MDA content and enhance the activities of antioxidative enzymes in both the varieties. But it was found that the activity was higher in tolerant variety than susceptible variety under water stress conditions. Hence, overall results suggest that mycorrhizal symbiosis play a vital role in enhancing the activities of antioxidative enzymes and decreasing the ROS content that enables the host plant to sustain the drought conditions.
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Claims 6
Claim · model-written summary
Drought susceptible WH 1105 had greater cellular membrane damage under drought.
- Taxon
- wheat (Triticum aestivum)
Triticum aestivumt0 - Material
- WH 1105e0
- Outcome
- damage to cellular membranee0
- Direction
- greatere0
- Qualifier
- under stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variety WH 1105 suffered greater damage to cellular membrane due to high level of reactive oxygen species (ROS) as indicated by superoxide radical (O.-), hydrogen peroxide (H2O2) and malondialdehyde (MDA) content under stress conditions”
t0“wheat (Triticum aestivum)”
Claim · model-written summary
SOD, APX, GR, CAT and POX activities were higher in drought tolerant wheat.
- Taxon
- wheat (Triticum aestivum)Triticum aestivumt0
- Outcome
- Antioxidative enzymese0
- Direction
- highere0
- Qualifier
- drought tolerant varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidative enzymes viz. superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT) and peroxidase (POX) were higher in drought tolerant variety”
t0“wheat (Triticum aestivum)”
Claim · model-written summary
Water stress increased ascorbic acid and glutathione in both varieties, more in WH 1025.
- Taxon
- wheat (Triticum aestivum)Triticum aestivumt0
- Material
- WH 1025e0
- Treatment
- water stresse0
- Outcome
- ascorbic acid and glutathione contente0
- Direction
- increasede0
- Comparator
- WH 1105e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidative metabolites viz. ascorbic acid and glutathione content was increased in both tolerant and susceptible variety under water stress but with higher magnitude in WH 1025 than WH 1105”
t0“wheat (Triticum aestivum)”
Claim · model-written summary
Mycorrhizal inoculation decreased superoxide, hydrogen peroxide and MDA under water stress.
- Taxon
- wheat (Triticum aestivum)Triticum aestivumt0
- Treatment
- mycorrhizal inoculatione0
- Interactor
- arbuscular mycorrhizat0symbiont
- Outcome
- O2 .-, H2O2, and MDA contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under water stress conditions, mycorrhizal inoculation significantly decreased the O2 .-, H2O2, and MDA content”
t0“arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum)”
Claim · model-written summary
Mycorrhizal inoculation enhanced antioxidative enzyme activities under water stress.
- Taxon
- wheat (Triticum aestivum)Triticum aestivumt0
- Treatment
- mycorrhizal inoculatione0
- Interactor
- arbuscular mycorrhizat0symbiont
- Outcome
- activities of antioxidative enzymese0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mycorrhizal inoculation significantly decreased the O2 .-, H2O2, and MDA content and enhance the activities of antioxidative enzymes in both the varieties”
t0“arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum)”
Claim · model-written summary
Antioxidative enzyme activity under water stress was higher in the tolerant variety.
- Taxon
- wheat (Triticum aestivum)Triticum aestivumt0
- Outcome
- activitye0
- Direction
- highere0
- Qualifier
- under water stress conditionse0
- Comparator
- susceptible varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity was higher in tolerant variety than susceptible variety under water stress conditions”
t0“wheat (Triticum aestivum)”
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