Abstract
Drought is a global phenomenon that endangers agricultural production by creating water scarcity. Selecting drought-tolerant cultivars, varieties, and species is essential for maintaining the food supply and advancing breeding efforts. The study aimed to compare red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.) for drought tolerance at the early growth stage considering morpho-physiological and stomatal parameters. Three red beet cultivars (Bicores, BT Pancina, and Yakut) and three sugar beet cultivars (Mohican, Orthega KWS, and Valentina) were subjected to various drought stress (Control, 10%, and 20% PEG-6000) for 30 days at the four-leaf stage. Fresh and dry plant weight, leaf area, dry matter, chlorophyll content (SPAD), leaf temperature, relative water content, membrane stability index, stomatal density, and size were investigated. The results revealed that the cultivars exhibited different responses to drought stress, and a greater percentage reduction in morphological parameters was observed in red beet cultivars. Drought markedly reduced the fresh and dry weights, leaf area, relative water content, membrane stability, and stomatal size. Enhanced dry matter and stomatal density were identified. The stomatal density increased from 158 to 215 mm −2 while the stomatal size decreased from 433 to 342 µm 2 in the plants subjected to 20% PEG. Moderate drought stress effectively distinguished drought-tolerant sugar beet and red beet genotypes. It was concluded that sugar beet appeared to be more drought-tolerant than red beet and that the membrane stability index, relative water content, and stomatal density could be effectively used for selecting drought-tolerant beet genotypes.
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Claims 9
Claim · model-written summary
Red beet cultivars had greater percentage reductions in morphological parameters under drought.
Verbatim
e0“a greater percentage reduction in morphological parameters was observed in red beet cultivars.”
e1“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Drought reduced fresh and dry weights and leaf area.
Not reportedComparator
Verbatim
e0“Drought markedly reduced the fresh and dry weights, leaf area, relative water content, membrane stability, and stomatal size.”
e1“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Drought reduced relative water content and membrane stability.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise1 - Treatment
- Droughte0
- Outcome
- relative water content, membrane stabilitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought markedly reduced the fresh and dry weights, leaf area, relative water content, membrane stability, and stomatal size.”
e1“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Stomatal size decreased from 433 to 342 µm 2 under 20% PEG.
- Taxon
- red beete1
- Treatment
- 20% PEGe0
- Outcome
- stomatal sizee0
- Direction
- decreasede0
- Value
- 342 µm 2e0
- Qualifier
- 433e0
Not reportedComparator
Verbatim
e0“the stomatal size decreased from 433 to 342 µm 2 in the plants subjected to 20% PEG.”
e1“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Dry matter increased under drought.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise2
- Treatment
- drought stresse1
- Outcome
- dry mattere0
- Direction
- Enhancede0
- Comparator
- Controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhanced dry matter and stomatal density were identified.”
e1“various drought stress (Control, 10%, and 20% PEG-6000)”
e2“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Stomatal density increased from 158 to 215 mm −2 under 20% PEG.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- 20% PEGe0
- Outcome
- stomatal densitye0
- Direction
- increasede0
- Value
- 215 mm −2e0
- Qualifier
- 158e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stomatal density increased from 158 to 215 mm −2 while the stomatal size decreased from 433 to 342 µm 2 in the plants subjected to 20% PEG.”
e1“red beet ( Beta vulgaris L. var. cruenta ) and sugar beet ( B. vulgaris L. var. altissima Döll.)”
Claim · model-written summary
Moderate drought distinguished drought tolerant sugar beet and red beet genotypes.
- Taxon
- sugar beet and red beete0
- Outcome
- distinguished drought-tolerant sugar beet and red beet genotypese0
Not reportedComparatorValue
Verbatim
e0“Moderate drought stress effectively distinguished drought-tolerant sugar beet and red beet genotypes.”
Claim · model-written summary
Sugar beet appeared more drought tolerant than red beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- drought-tolerante0
- Direction
- moree0
- Comparator
- red beete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugar beet appeared to be more drought-tolerant than red beet”
Claim · model-written summary
Membrane stability index, relative water content and stomatal density were proposed for selecting drought tolerant beet genotypes.
- Taxon
- beet
Beta vulgarise0 - Outcome
- selecting drought-tolerant beet genotypese0
- Qualifier
- membrane stability index, relative water content, and stomatal densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the membrane stability index, relative water content, and stomatal density could be effectively used for selecting drought-tolerant beet genotypes.”
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