Abstract
Abstract Biochemical and physiological processes serve as key indicators for assessing the adverse effects of biotic and abiotic stressors in plants. Due to the limited and incomplete information on the growth, root morphology, and physiology of watermelon lines under cold stress in Korea, this study aimed to evaluate selected cold-tolerant lines (PI254744, SW20, and SW66) and cold-sensitive lines (PI525233 and SW54). The evaluation was based on root and shoot weight, root and shoot length, root morphology, photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids), and levels of proline, malondialdehyde (MDA), and soluble sugars in root and leaf samples collected at various time points. Two treatments were conducted: one at 28 °C as a control and one at 10 °C to simulate cold stress. The results revealed a decline in growth variables under cold stress compared to the control across all lines. However, the disintegration of root cellular structures and reduction in growth variables were less severe in the tolerant watermelon lines than in the sensitive ones. Under cold stress, proline, MDA, and soluble sugar levels increased in all watermelon lines relative to the control. Notably, the tolerant lines displayed elevated proline and soluble sugar levels, while the sensitive lines had higher MDA content. Furthermore, photosynthetic pigment levels were generally lower in all lines during cold treatment compared to the control, though the reduction was less pronounced in the tolerant lines than in the sensitive ones. A significant positive correlation was found between the percentage reduction in total chlorophyll content and the percentage reduction in growth variables. The lesser reduction in photosynthetic pigments, combined with higher levels of osmoprotectants (proline and soluble sugars) and lower MDA levels in the tolerant lines during cold stress, may suggest underlying mechanisms that warrant further biochemical and molecular studies to better understand cold resistance.
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Claims 10
Claim · model-written summary
Cold stress reduced growth variables across all watermelon lines.
- Taxon
- watermelon lines
Citrullus lanatust0 - Treatment
- cold stresse0
- Outcome
- growth variablese0
- Direction
- declinee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed a decline in growth variables under cold stress compared to the control across all lines.”
t0“watermelon lines”
Claim · model-written summary
Cold tolerant watermelon lines had less severe root cellular disintegration than sensitive lines.
- Taxon
- watermelon linesCitrullus lanatuse0
- Material
- tolerant watermelon linese0
- Outcome
- disintegration of root cellular structurese0
- Direction
- less severee0
- Comparator
- sensitive onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the disintegration of root cellular structures and reduction in growth variables were less severe in the tolerant watermelon lines than in the sensitive ones.”
Claim · model-written summary
Cold tolerant watermelon lines had less severe growth reduction than sensitive lines.
- Taxon
- watermelon linesCitrullus lanatuse0
- Material
- tolerant watermelon linese0
- Outcome
- reduction in growth variablese0
- Direction
- less severee0
- Comparator
- sensitive onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in growth variables were less severe in the tolerant watermelon lines than in the sensitive ones.”
Claim · model-written summary
Cold stress increased proline, MDA, and soluble sugar levels in all watermelon lines.
- Taxon
- watermelon linesCitrullus lanatuse0
- Treatment
- cold stresse0
- Outcome
- proline, MDA, and soluble sugar levelse0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under cold stress, proline, MDA, and soluble sugar levels increased in all watermelon lines relative to the control.”
Claim · model-written summary
Tolerant lines had elevated proline and soluble sugar levels.
- Taxon
- watermelon linesCitrullus lanatust0
- Material
- tolerant linese0
- Outcome
- proline and soluble sugar levelse0
- Direction
- elevatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant lines displayed elevated proline and soluble sugar levels, while the sensitive lines had higher MDA content.”
t0“watermelon lines”
Claim · model-written summary
Sensitive lines had higher MDA content.
- Taxon
- watermelon linesCitrullus lanatust0
- Material
- sensitive linese0
- Outcome
- MDA contente0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sensitive lines had higher MDA content.”
t0“watermelon lines”
Claim · model-written summary
Cold treatment lowered photosynthetic pigment levels across all watermelon lines.
- Taxon
- watermelon linesCitrullus lanatust0
- Treatment
- cold treatmente0
- Outcome
- photosynthetic pigment levelse0
- Direction
- lowere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic pigment levels were generally lower in all lines during cold treatment compared to the control”
t0“watermelon lines”
Claim · model-written summary
Cold induced photosynthetic pigment reductions were less pronounced in tolerant than sensitive lines.
- Taxon
- watermelon linesCitrullus lanatust0
- Material
- tolerant linese0
- Outcome
- photosynthetic pigment levelse1
- Direction
- less pronouncede0
- Comparator
- sensitive onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction was less pronounced in the tolerant lines than in the sensitive ones.”
e1“photosynthetic pigment levels were generally lower in all lines during cold treatment”
t0“watermelon lines”
Claim · model-written summary
Percentage reductions in total chlorophyll content and growth variables correlated positively.
- Taxon
- watermelon linesCitrullus lanatust0
- Outcome
- percentage reduction in growth variablese0
- Direction
- positive correlatione0
- Qualifier
- percentage reduction in total chlorophyll contente0
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant positive correlation was found between the percentage reduction in total chlorophyll content and the percentage reduction in growth variables.”
t0“watermelon lines”
Claim · model-written summary
The authors suggest osmoprotectants, pigments, and MDA may contribute to cold resistance in tolerant lines.
- Taxon
- watermelon linesCitrullus lanatust0
- Material
- tolerant linese0
- Outcome
- cold resistancee0
- Qualifier
- may suggest underlying mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lesser reduction in photosynthetic pigments, combined with higher levels of osmoprotectants (proline and soluble sugars) and lower MDA levels in the tolerant lines during cold stress, may suggest underlying mechanisms that warrant further biochemical and molecular studies to better understand cold resistance.”
t0“watermelon lines”
The same questions in other papers
cold · growth · Citrullus lanatus (watermelon)Positive and negative results
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- positive
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See all 6 papers →cold · physiology: photosynthesis · Citrullus lanatus (watermelon)Results agree
4 papers in the same direction as this paper
- negative
- negative
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See all 5 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.