Abstract
Abstract Drought stress limits the growth and performance of plants. Considering the increasing drought stress worldwide, the selection of resistant cultivars is important. Grapes (Vitis vinifera L.) are drought-tolerant and often cultivars unknown. The grape cultivars of Khuzestan, Iran, are among those that have not been extensively studied for their drought tolerance. Our initial studies have shown that some of these cultivars exhibit high drought tolerance indices, even compared to globally tolerant cultivars. In the present study, the effect of drought stress at four levels (20, 50, 75, and 100% of field capacity) was investigated on eight cultivars (native Khuzestan cultivars: ‘Bangi’, ‘Yershi’, ‘Soltani’, and non-native cultivars grown in Khuzestan: ‘Perlette’, ‘Flame Seedless’, ‘Yaghouti Ghermez’, and ‘Yaghouti Sabz’, and ‘Asgari’). The experiment was conducted in a factorial design with three replications in a completely randomized design. The results showed that with increasing drought stress, a decrease in root and shoot growth was observed in all cultivars. Additionally, membrane stability index, relative water content, and protein content decreased. Conversely, Total soluble solids, proline, glycine betaine, and malondialdehyde increased. This increase was observed in all cultivars, although the magnitude of increase varied among cultivars. The increase in antioxidant enzyme activities of catalase and peroxidase was also significant. Native cultivars, especially ‘Soltani’, ‘Yershi’, and ‘Bangi’, had less decrease in membrane stability index and relative water content compared to other cultivars. Additionally, these native cultivars showed a greater increase in Total soluble solids level and catalase and peroxidase activities compared to other cultivars. Overall, based on the conducted study and comparison with previous studies, it appears that ‘Soltani’, ‘Yershi’, and ‘Bangi’ cultivars have a high degree of drought tolerance.
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Claims 8
Claim · model-written summary
Increasing drought stress reduced root and shoot growth in all grape cultivars.
Not reportedComparator
Verbatim
e0“with increasing drought stress, a decrease in root and shoot growth was observed in all cultivars”
t0“Grape Cultivars”
Claim · model-written summary
Drought stress reduced membrane stability index, relative water content, and protein content.
- Taxon
- Grapet0
- Treatment
- Drought Stresst0
- Outcome
- membrane stability index, relative water content, and protein contente0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“membrane stability index, relative water content, and protein content decreased”
t0“Drought Stress on Some Morphophysiological Characteristics of Grape”
Claim · model-written summary
Drought stress increased total soluble solids, proline, and glycine betaine in all cultivars.
- Taxon
- Grapet0
- Treatment
- Drought Stresst0
- Outcome
- Total soluble solids, proline, glycine betainee0
- Direction
- increasede0
- Qualifier
- all cultivarse0
Not reportedComparator
Verbatim
e0“Total soluble solids, proline, glycine betaine, and malondialdehyde increased. This increase was observed in all cultivars”
t0“Drought Stress on Some Morphophysiological Characteristics of Grape”
Claim · model-written summary
Drought stress increased malondialdehyde in all cultivars.
Not reportedComparator
Verbatim
e0“Total soluble solids, proline, glycine betaine, and malondialdehyde increased. This increase was observed in all cultivars”
t0“Drought Stress on Some Morphophysiological Characteristics of Grape”
Claim · model-written summary
Drought stress significantly increased catalase and peroxidase activity.
- Taxon
- Grapet0
- Treatment
- Drought Stresst0
- Outcome
- antioxidant enzyme activities of catalase and peroxidasee0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“The increase in antioxidant enzyme activities of catalase and peroxidase was also significant”
t0“Drought Stress on Some Morphophysiological Characteristics of Grape”
Claim · model-written summary
Native cultivars Soltani, Yershi, and Bangi lost less membrane stability and water content than other cultivars.
Verbatim
e0“Native cultivars, especially ‘Soltani’, ‘Yershi’, and ‘Bangi’, had less decrease in membrane stability index and relative water content compared to other cultivars”
t0“Grape Cultivars”
Claim · model-written summary
These native cultivars had greater gains in soluble solids and antioxidant enzyme activities than other cultivars.
Verbatim
e0“these native cultivars showed a greater increase in Total soluble solids level and catalase and peroxidase activities compared to other cultivars”
t0“Grape Cultivars”
Claim · model-written summary
Soltani, Yershi, and Bangi were judged highly drought tolerant.
Verbatim
e0“‘Soltani’, ‘Yershi’, and ‘Bangi’ cultivars have a high degree of drought tolerance”
t0“Grape Cultivars”
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