Abstract
This study aimed to evaluate the effect of stress attenuators on the tolerance and antioxidant activity of watermelon cultivars under water deficit. The experiment was conducted in two stages, Stage I corresponding to water deficit levels (N1 = 0; N2 = −0.1; N3 = −0.2 MPa) and six watermelon cultivars. Stage II comprises two cultivars selected in Stage I (one sensitive and one tolerant) and the combination of water restriction with attenuators (T1 = 0.0 MPa (control), T2 = −0.2 MPa (water deficit), T3 = −0.2 MPa + hydropriming, T4 = −0.2 MPa + gibberellic acid, T5 = −0.2 MPa + salicylic acid, and T6 = −0.2 MPa + hydrogen peroxide). The concentration and exposure times of the attenuators were determined through preliminary tests. In Stage I, physiological and biochemical analyses were performed. In Stage II, in addition to these tests, hydrogen peroxide content, malondialdehyde levels, and the activity of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) were assessed. Water deficit impaired germination and seedling vigor of watermelon, with Crimson Sweet, Omaru, Charleston Gray, and Congo being the most sensitive cultivars, while Fairfax was the most tolerant. For Crimson Sweet, pre-germination treatments reduced oxidative stress and enhanced tolerance by stimulating antioxidant enzyme activity, with GA and H2O2 providing the most effective results. For Fairfax, greater tolerance was associated with osmotic adjustment through the accumulation of compatible solutes, a mechanism further enhanced by the use of attenuators.
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Claims 9
Claim · model-written summary
Water deficit impaired watermelon germination and seedling vigor.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- Water deficite0
- Outcome
- germination and seedling vigore0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit impaired germination and seedling vigor of watermelon”
Claim · model-written summary
Crimson Sweet, Omaru, Charleston Gray and Congo were the most sensitive watermelon cultivars under water deficit.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweet, Omaru, Charleston Gray, and Congoe0
- Outcome
- most sensitive cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with Crimson Sweet, Omaru, Charleston Gray, and Congo being the most sensitive cultivars”
t0“Watermelon Cultivars”
Claim · model-written summary
Fairfax was the most tolerant watermelon cultivar under water deficit.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Fairfaxe0
- Outcome
- most tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while Fairfax was the most tolerant”
t0“Watermelon Cultivars”
Claim · model-written summary
Pregermination treatments reduced oxidative stress in Crimson Sweet.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweete0
- Treatment
- pre-germination treatmentse0
- Outcome
- oxidative stresse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For Crimson Sweet, pre-germination treatments reduced oxidative stress”
t0“Watermelon Cultivars”
Claim · model-written summary
Pregermination treatments enhanced Crimson Sweet tolerance by stimulating antioxidant enzyme activity.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweete0
- Treatment
- pre-germination treatmentse0
- Outcome
- tolerancee0
- Direction
- enhancede0
- Qualifier
- stimulating antioxidant enzyme activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For Crimson Sweet, pre-germination treatments reduced oxidative stress and enhanced tolerance by stimulating antioxidant enzyme activity”
t0“Watermelon Cultivars”
Claim · model-written summary
GA gave among the most effective results for Crimson Sweet tolerance.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweete1
- Treatment
- GAe0
- Outcome
- most effective resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with GA and H2O2 providing the most effective results”
e1“For Crimson Sweet”
t0“Watermelon Cultivars”
Claim · model-written summary
H2O2 gave among the most effective results for Crimson Sweet tolerance.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweete1
- Treatment
- H2O2e0
- Outcome
- most effective resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with GA and H2O2 providing the most effective results”
e1“For Crimson Sweet”
t0“Watermelon Cultivars”
Claim · model-written summary
Greater Fairfax tolerance was associated with osmotic adjustment through compatible solute accumulation.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Fairfaxe0
- Outcome
- greater tolerancee0
- Qualifier
- osmotic adjustment through the accumulation of compatible solutese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For Fairfax, greater tolerance was associated with osmotic adjustment through the accumulation of compatible solutes”
t0“Watermelon Cultivars”
Claim · model-written summary
Attenuators further enhanced the osmotic adjustment mechanism in Fairfax.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- attenuatorse0
- Outcome
- mechanisme0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a mechanism further enhanced by the use of attenuators”
t0“Watermelon Cultivars”
The same questions in other papers
drought · growth · Citrullus lanatus (watermelon)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- negative
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See all 10 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.