Abstract
Drought stress is one of the major abiotic stresses in agriculture worldwide. This study was carried out to investigate the effect of drought stress on proline content, chlorophyll content, photosynthesis and transpiration, stomatal conductance and yield characteristics in three varieties of chickpea (drought tolerant Bivaniej and ILC482 and drought sensitive Pirouz). A field experiment with four irrigation regimes was carried out in a randomized complete block design with three replications. Treatments included control (no drought), drought stress imposed during the vegetative phase, drought stress imposed during anthesis and drought stress during the vegetative phase and during anthesis. All physiological parameters were affected by drought stress. Drought stress imposed during vegetative growth or anthesis significantly decreased chlorophyll a, chlorophyll b and total chlorophyll content. Proline accumulation was higher in ‘ILC482 ’ than in ‘Pirouz ’ both under control and drought stress conditions. Photosynthesis, transpiration, stomatal conductance and yield were higher but sub-stomatal CO2 concentration was lower under drought stress conditions than under control conditions. The results showed that mesophyll resistance is the basic determinate of rate of phototosynthesis under drought stress conditions. Under drought conditions the drought tolerant variety ‘Bivaniej ’ gave the highest yield whereas the drought sensitive variety ‘Pirouz ’ gave the lowest yield. Drought stress at anthesis phase reduced seed yield more severe than that on vegetative stage.
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Claims 9
Claim · model-written summary
Vegetative or anthesis drought significantly reduced chlorophyll a, b and total content.
- Taxon
- chickpea
Cicer arietinumt0 - Treatment
- Drought stress imposed during vegetative growth or anthesise0
- Outcome
- chlorophyll a, chlorophyll b and total chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress imposed during vegetative growth or anthesis significantly decreased chlorophyll a, chlorophyll b and total chlorophyll content”
t0“chickpea”
Claim · model-written summary
ILC482 accumulated more proline than Pirouz under control and drought.
- Taxon
- chickpeaCicer arietinumt0
- Material
- ‘ILC482 ’e0
- Outcome
- Proline accumulatione0
- Direction
- highere0
- Qualifier
- both under control and drought stress conditionse0
- Comparator
- ‘Pirouz ’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proline accumulation was higher in ‘ILC482 ’ than in ‘Pirouz ’ both under control and drought stress conditions”
t0“chickpea”
Claim · model-written summary
Under drought, photosynthesis, transpiration and stomatal conductance were higher than under control.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- drought stress conditionse0
- Outcome
- Photosynthesis, transpiration, stomatal conductancee0
- Direction
- highere0
- Comparator
- control conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthesis, transpiration, stomatal conductance and yield were higher but sub-stomatal CO2 concentration was lower under drought stress conditions than under control conditions”
t0“chickpea”
Claim · model-written summary
Yield under drought was higher than under control.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- drought stress conditionse0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- control conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthesis, transpiration, stomatal conductance and yield were higher but sub-stomatal CO2 concentration was lower under drought stress conditions than under control conditions”
t0“chickpea”
Claim · model-written summary
Sub-stomatal CO2 concentration under drought was lower than control.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- drought stress conditionse0
- Outcome
- sub-stomatal CO2 concentratione0
- Direction
- lowere0
- Comparator
- control conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sub-stomatal CO2 concentration was lower under drought stress conditions than under control conditions”
t0“chickpea”
Claim · model-written summary
Authors identified mesophyll resistance as determining photosynthesis rate under drought.
- Taxon
- chickpeaCicer arietinumt0
- Outcome
- rate of phototosynthesise0
- Qualifier
- mesophyll resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mesophyll resistance is the basic determinate of rate of phototosynthesis under drought stress conditions”
t0“chickpea”
Claim · model-written summary
Bivaniej had the highest yield under drought.
- Taxon
- chickpeaCicer arietinumt0
- Material
- ‘Bivaniej ’e0
- Outcome
- yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought conditions the drought tolerant variety ‘Bivaniej ’ gave the highest yield”
t0“chickpea”
Claim · model-written summary
Pirouz had the lowest yield under drought.
- Taxon
- chickpeaCicer arietinumt0
- Material
- ‘Pirouz ’e0
- Outcome
- yielde0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the drought sensitive variety ‘Pirouz ’ gave the lowest yield”
t0“chickpea”
Claim · model-written summary
Drought at anthesis reduced seed yield more than drought at the vegetative stage.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- Drought stress at anthesis phasee0
- Outcome
- seed yielde0
- Direction
- reducede0
- Comparator
- vegetative stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress at anthesis phase reduced seed yield more severe than that on vegetative stage”
t0“chickpea”
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