Abstract
The objective of this study was to evaluate the role of the antioxidative defense system in imparting tolerance against drought-induced oxidative stress in seven chickpea comprising of two drought tolerant (desi-PDG 3 and PDG 4) and five drought susceptible (desi-PBG 1, GPF 2, PBG 5 and kabuli-L 550 and BG 1053) cultivars, when subjected to field drought stress. The study was conducted in reproductive tissues (podwall and seed) at 10, 20, 30 and 40 days after flowering (DAF) under irrigated and rainfed conditions. Drought susceptibility index (DSI) in the tolerant cultivars was comparatively lower than susceptible cultivars. Effect of water deficit conditions on plant growth led to decline in harvest index of all chickpea culitvars. However, in tolerant cultivars decline in harvest index was lower. During early pod development, the activities of antioxidative enzymes SOD, CAT, GR, POX and APX were more and as development progressed towards maturity the activities declined. Drought resulted in an increase in H2O2 accumulation and lipid peroxidation at different reproductive developmental stages. Drought-tolerant cultivars have higher antioxidant enzymes activities as compared to that of susceptible cultivars resulting in maintenance of lower H2O2 content and lipid peroxidation and higher growth, yield and yield components under water stress condition. In developing pods, susceptible cultivars failed to modulate the activities of antioxidative enzymes according to the ROS under field drought. Poor capacity of the antioxidative defense system in reproductive tissues of susceptible cultivars seems to be partly responsible for reduced yield potential under drought stress. Moreover, the higher status of antioxidative enzymes in pod wall of tolerant cultivars might protect the developing seeds from deleterious effects of drought.
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Claims 11
Claim · model-written summary
Drought susceptibility index was lower in tolerant cultivars.
- Taxon
- Chickpea
Cicer arietinumt0 - Material
- tolerant cultivarse0
- Outcome
- Drought susceptibility index (DSI)e0
- Direction
- lowere0
- Comparator
- susceptible cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought susceptibility index (DSI) in the tolerant cultivars was comparatively lower than susceptible cultivars”
t0“Chickpea”
Claim · model-written summary
Water deficit reduced harvest index in all cultivars.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- water deficit conditionse0
- Outcome
- harvest indexe0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effect of water deficit conditions on plant growth led to decline in harvest index of all chickpea culitvars”
Claim · model-written summary
The harvest index decline was smaller in tolerant cultivars.
- Taxon
- ChickpeaCicer arietinumt0
- Material
- tolerant cultivarse0
- Outcome
- harvest indexe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in tolerant cultivars decline in harvest index was lower”
t0“Chickpea”
Claim · model-written summary
Antioxidative enzyme activities were higher during early pod development and declined toward maturity.
- Taxon
- ChickpeaCicer arietinumt0
- Organ / stage
- early pod developmente0
- Outcome
- activities of antioxidative enzymes SOD, CAT, GR, POX and APXe0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During early pod development, the activities of antioxidative enzymes SOD, CAT, GR, POX and APX were more and as development progressed towards maturity the activities declined”
t0“Chickpea”
Claim · model-written summary
Drought increased H2O2 accumulation and lipid peroxidation.
- Taxon
- ChickpeaCicer arietinumt0
- Organ / stage
- reproductive developmental stagese0
- Treatment
- Droughte0
- Outcome
- H2O2 accumulation and lipid peroxidatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought resulted in an increase in H2O2 accumulation and lipid peroxidation at different reproductive developmental stages”
t0“Chickpea”
Claim · model-written summary
Tolerant cultivars had higher antioxidant enzyme activities than susceptible cultivars.
- Taxon
- ChickpeaCicer arietinumt0
- Material
- Drought-tolerant cultivarse0
- Outcome
- antioxidant enzymes activitiese0
- Direction
- highere0
- Comparator
- susceptible cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-tolerant cultivars have higher antioxidant enzymes activities as compared to that of susceptible cultivars”
t0“Chickpea”
Claim · model-written summary
Tolerant cultivars maintained lower H2O2 content and lipid peroxidation.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- H2O2 content and lipid peroxidatione0
- Direction
- lowere0
- Qualifier
- water stress conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintenance of lower H2O2 content and lipid peroxidation and higher growth, yield and yield components under water stress condition”
t0“Chickpea”
Claim · model-written summary
Tolerant cultivars maintained higher growth, yield and yield components under water stress.
- Taxon
- ChickpeaCicer arietinumt0
- Outcome
- growth, yield and yield componentse0
- Direction
- highere0
- Qualifier
- water stress conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher growth, yield and yield components under water stress condition”
t0“Chickpea”
Claim · model-written summary
Susceptible cultivars failed to modulate antioxidant enzyme activities according to ROS during field drought.
- Taxon
- ChickpeaCicer arietinumt0
- Material
- susceptible cultivarse0
- Outcome
- failed to modulate the activities of antioxidative enzymese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“susceptible cultivars failed to modulate the activities of antioxidative enzymes according to the ROS under field drought”
t0“Chickpea”
Claim · model-written summary
Authors suggest weak antioxidative defense partly explains reduced drought yield potential in susceptible cultivars.
- Taxon
- ChickpeaCicer arietinumt0
- Organ / stage
- reproductive tissuese0
- Outcome
- reduced yield potentiale0
- Qualifier
- Poor capacity of the antioxidative defense systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Poor capacity of the antioxidative defense system in reproductive tissues of susceptible cultivars seems to be partly responsible for reduced yield potential under drought stress”
t0“Chickpea”
Claim · model-written summary
Authors suggest higher pod wall antioxidant status might protect developing seeds under drought.
- Taxon
- ChickpeaCicer arietinumt0
- Organ / stage
- pod walle0
- Outcome
- protect the developing seedse0
- Qualifier
- higher status of antioxidative enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher status of antioxidative enzymes in pod wall of tolerant cultivars might protect the developing seeds from deleterious effects of drought”
t0“Chickpea”
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See all 19 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.