Abstract
Water shortage is the main limitation for agricultural production in many parts of the world. Drought or unavailability of water may seriously limit plant growth as well as yield. A pot experiment was carried out to evaluate the effects of various irrigation strategies, i.e., Full (FI), deficit (DI) and partial root-zone drying (PRD) on physiological, biochemical and yield-related attributes of cotton crop. Irrigation treatments started 60 days after planting and lasted for 60 days. For FI and DI, 100% and 50% of evapotranspiration (ET) was replaced by irrigating the entire pot surface every 4–5 days. For PRD, root system was split into two equal halves and during each irrigation event, only one-half of the root system was irrigated with the same amount of water as applied to DI, and subsequently, irrigation was switched to the second half.PRD irrigation significantly improved WUE, which was 21% and 26% higher than FI and DI, respectively. Higher ABA production under PRD reduced stomatal conductance and net photosynthesis. The activity of antioxidant enzymes namely superoxide dismutase, peroxidase, catalase and ascorbate peroxidase was significantly higher under PRD than DI and FI. Magnitude of osmotic adjustment (i.e. total sugar and proline content) was lowest and highest under FI and PRD, respectively. However, PRD reduced chlorophyll content index, seed cotton yield and fiber quality (fiber strength, fiber length, fiber fineness) as compared to FI. The results indicated that despite improving the WUE, PRD tended to compromise the yield and quality of cotton crop. Results imply that PRD treatment can be an option under water shortage; however, its suitability and efficacy should further be tested under field conditions by applying irrigation water in alternate rows.
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Claims 10
Claim · model-written summary
PRD raised cotton water use efficiency by 21% over FI.
- Taxon
- Cotton Crop
Gossypium hirsutumt0 - Treatment
- PRDe0
- Outcome
- WUEe0
- Direction
- highere0
- Value
- 21%e0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRD irrigation significantly improved WUE, which was 21% and 26% higher than FI and DI, respectively.”
t0“Cotton Crop”
Claim · model-written summary
PRD raised cotton water use efficiency by 26% over DI.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Outcome
- WUEe0
- Direction
- highere0
- Value
- 26%e0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRD irrigation significantly improved WUE, which was 21% and 26% higher than FI and DI, respectively.”
t0“Cotton Crop”
Claim · model-written summary
Higher ABA production under PRD reduced stomatal conductance.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Compound
- ABAe0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher ABA production under PRD reduced stomatal conductance and net photosynthesis.”
t0“Cotton Crop”
Claim · model-written summary
Higher ABA production under PRD reduced net photosynthesis.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Compound
- ABAe0
- Outcome
- net photosynthesise0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher ABA production under PRD reduced stomatal conductance and net photosynthesis.”
t0“Cotton Crop”
Claim · model-written summary
PRD raised antioxidant enzyme activity relative to DI and FI.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Gene
- superoxide dismutase, peroxidase, catalase and ascorbate peroxidasee0
- Outcome
- activity of antioxidant enzymese0
- Direction
- highere0
- Comparator
- DI and FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of antioxidant enzymes namely superoxide dismutase, peroxidase, catalase and ascorbate peroxidase was significantly higher under PRD than DI and FI.”
t0“Cotton Crop”
Claim · model-written summary
Osmotic adjustment was lowest under FI and highest under PRD.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Outcome
- Magnitude of osmotic adjustment (i.e. total sugar and proline content)e0
- Direction
- higheste0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Magnitude of osmotic adjustment (i.e. total sugar and proline content) was lowest and highest under FI and PRD, respectively.”
t0“Cotton Crop”
Claim · model-written summary
PRD reduced cotton chlorophyll content index against FI.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Outcome
- chlorophyll content indexe0
- Direction
- reducede0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRD reduced chlorophyll content index, seed cotton yield and fiber quality (fiber strength, fiber length, fiber fineness) as compared to FI.”
t0“Cotton Crop”
Claim · model-written summary
PRD reduced seed cotton yield against FI.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Outcome
- seed cotton yielde0
- Direction
- reducede0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRD reduced chlorophyll content index, seed cotton yield and fiber quality (fiber strength, fiber length, fiber fineness) as compared to FI.”
t0“Cotton Crop”
Claim · model-written summary
PRD reduced cotton fiber strength, length and fineness against FI.
- Taxon
- Cotton CropGossypium hirsutumt0
- Treatment
- PRDe0
- Outcome
- fiber strength, fiber length, fiber finenesse0
- Direction
- reducede0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRD reduced chlorophyll content index, seed cotton yield and fiber quality (fiber strength, fiber length, fiber fineness) as compared to FI.”
t0“Cotton Crop”
Claim · model-written summary
The authors suggest PRD as an option under water shortage, subject to field testing.
- Taxon
- Cotton CropGossypium hirsutumt0
- Outcome
- PRD treatment can be an option under water shortagee0
- Qualifier
- suitability and efficacy should further be tested under field conditions by applying irrigation water in alternate rowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results imply that PRD treatment can be an option under water shortage; however, its suitability and efficacy should further be tested under field conditions by applying irrigation water in alternate rows.”
t0“Cotton Crop”
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