Abstract
Background: Drought stress is one of the most common and important environmental factors affecting crop growth and production. Sugar Beet (Beta vulgaris L.) is a temperate halophyte crop, but it is sensitive to water scarcity, which can reduce its growth and yield. Methods: To study the performance of tropical sugar beet under water deficit conditions, a pot experiment was conducted in January to May 2021, using a completely randomized design with three replicates. First and second cycles of drought stress were imposed on seven-week-old sugar beet plants (LS-6 tropical variety). The first phase of stress involved with 5, 10, 15 and 20 days of irrigation withholding to 8 treatments, followed by 15 days of normal watering. Then, half of the treatments were subjected to a second cycle of drought by imposing 3 days of stress. Drought effects were studied in terms of growth, physiological, biochemical and yield characteristics. Result: Water deficit hampered plant growth by reducing leaf area and leaf area index. A marked decrease in relative water content and chlorophyll stability index was also observed. Proline and total soluble carbohydrate content increased compared to the control, while starch content was decreased. However, after 15 days of watering under the second duration of stress, all parameters recovered against control, with a slight effect compared to single-stressed treatments. Yield reduction was observed under severe stress 20 days water withholding, whereas the drought effect was not significant on the harvest index.
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Claims 7
Claim · model-written summary
Water deficit reduced leaf area and leaf area index.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Water deficite0
- Outcome
- leaf area and leaf area indexe0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit hampered plant growth by reducing leaf area and leaf area index.”
t0“Sugar Beet”
Claim · model-written summary
Water deficit decreased relative water content and chlorophyll stability index.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Water deficite1
- Outcome
- relative water content and chlorophyll stability indexe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A marked decrease in relative water content and chlorophyll stability index was also observed.”
t0“Sugar Beet”
e1“Water deficit hampered plant growth by reducing leaf area and leaf area index.”
Claim · model-written summary
Proline and total soluble carbohydrate content increased relative to control.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Water deficite1
- Outcome
- Proline and total soluble carbohydrate contente0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proline and total soluble carbohydrate content increased compared to the control”
t0“Sugar Beet”
e1“Water deficit hampered plant growth by reducing leaf area and leaf area index.”
Claim · model-written summary
Starch content decreased relative to control.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- Water deficite1
- Outcome
- starch contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while starch content was decreased.”
t0“Sugar Beet”
e1“Water deficit hampered plant growth by reducing leaf area and leaf area index.”
Claim · model-written summary
After 15 days of watering under the second stress duration, all parameters recovered against control.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- 15 days of watering under the second duration of stresse0
- Outcome
- all parameterse0
- Direction
- recoverede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 15 days of watering under the second duration of stress, all parameters recovered against control”
t0“Sugar Beet”
Claim · model-written summary
Severe 20 day water withholding reduced yield.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- severe stress 20 days water withholdinge0
- Outcome
- Yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield reduction was observed under severe stress 20 days water withholding”
t0“Sugar Beet”
Claim · model-written summary
Drought had no significant effect on harvest index.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- droughte0
- Outcome
- harvest indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the drought effect was not significant on the harvest index”
t0“Sugar Beet”
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