Abstract
Drought conditions may have direct or indirect effects on plant physiology, biochemistry, and molecular characteristics. The purpose of this study was to investigate the effects of drought stress on the physiological, biochemical, and molecular responses of three different watermelon cultivars with varying levels of drought tolerance (24: drought resistant, CS: moderately tolerant, and 98: drought sensitive). The cultivars exhibited different responses to cope with water stress according to their tolerance level. Drought induced significant reductions in chlorophyll a, total chlorophyll and carotenoid content and glutation reductase and ascorbate peroxidase activity in the sensitive cultivar unlike in the moderately tolerant and drought resistant cultivars. Additionally, the expression levels of NAC1, NAC2, ORE1, WRKY24, SAG12, SAG13, KCS2, CER1, DREB2A, LTP3, SWEET15, and PYL9 genes were measured using qRT-PCR. The expression ratios of the genes significantly varied depending on the gene location and on the tolerance of the cultivars. Results showed that the physiology and biochemical and molecular pathways of tolerant cultivars change to adapt to drought conditions. Therefore, the drought-resistant cultivar copes with drought stress by increasing proline content and antioxidant enzyme activities, as well as by increasing the expression of specific genes.
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Claims 6
Claim · model-written summary
Drought significantly reduced chlorophyll a, total chlorophyll and carotenoid content in the sensitive watermelon cultivar 98, unlike the moderately tolerant and drought resistant cultivars.
- Taxon
- Watermelon
Citrullus lanatust0 - Material
- 98e1
- Treatment
- Droughte0
- Outcome
- chlorophyll a, total chlorophyll and carotenoid contente0
- Direction
- reductionse0
- Comparator
- moderately tolerant and drought resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e1“three different watermelon cultivars with varying levels of drought tolerance (24: drought resistant, CS: moderately tolerant, and 98: drought sensitive)”
e0“Drought induced significant reductions in chlorophyll a, total chlorophyll and carotenoid content and glutation reductase and ascorbate peroxidase activity in the sensitive cultivar unlike in the moderately tolerant and drought resistant cultivars”
Claim · model-written summary
Drought significantly reduced glutathione reductase and ascorbate peroxidase activity in the sensitive watermelon cultivar 98, unlike the moderately tolerant and drought resistant cultivars.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- 98e1
- Treatment
- Droughte0
- Outcome
- glutation reductase and ascorbate peroxidase activitye0
- Direction
- reductionse0
- Comparator
- moderately tolerant and drought resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e1“three different watermelon cultivars with varying levels of drought tolerance (24: drought resistant, CS: moderately tolerant, and 98: drought sensitive)”
e0“Drought induced significant reductions in chlorophyll a, total chlorophyll and carotenoid content and glutation reductase and ascorbate peroxidase activity in the sensitive cultivar unlike in the moderately tolerant and drought resistant cultivars”
Claim · model-written summary
The expression ratios of NAC1, NAC2, ORE1, WRKY24, SAG12, SAG13, KCS2, CER1, DREB2A, LTP3, SWEET15 and PYL9 significantly varied with gene location and cultivar tolerance.
- Taxon
- WatermelonCitrullus lanatust0
- Gene
- NAC1, NAC2, ORE1, WRKY24, SAG12, SAG13, KCS2, CER1, DREB2A, LTP3, SWEET15, and PYL9e2
- Outcome
- expression ratios of the genese3
- Qualifier
- depending on the gene location and on the tolerance of the cultivarse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e2“the expression levels of NAC1, NAC2, ORE1, WRKY24, SAG12, SAG13, KCS2, CER1, DREB2A, LTP3, SWEET15, and PYL9 genes were measured using qRT-PCR”
e3“The expression ratios of the genes significantly varied depending on the gene location and on the tolerance of the cultivars”
Claim · model-written summary
The drought-resistant watermelon cultivar 24 increased proline content and antioxidant enzyme activities under drought stress.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- 24e1
- Treatment
- drought stresse4
- Outcome
- proline content and antioxidant enzyme activitiese4
- Direction
- increasinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e1“three different watermelon cultivars with varying levels of drought tolerance (24: drought resistant, CS: moderately tolerant, and 98: drought sensitive)”
e4“The drought-resistant cultivar copes with drought stress by increasing proline content and antioxidant enzyme activities, as well as by increasing the expression of specific genes”
Claim · model-written summary
The drought-resistant watermelon cultivar 24 increased the expression of specific genes under drought stress.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- 24e1
- Treatment
- drought stresse4
- Outcome
- expression of specific genese4
- Direction
- increasinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e1“three different watermelon cultivars with varying levels of drought tolerance (24: drought resistant, CS: moderately tolerant, and 98: drought sensitive)”
e4“The drought-resistant cultivar copes with drought stress by increasing proline content and antioxidant enzyme activities, as well as by increasing the expression of specific genes”
Claim · model-written summary
Tolerant watermelon cultivars change their physiological, biochemical and molecular pathways to adapt to drought.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- physiology and biochemical and molecular pathwayse5
- Qualifier
- to adapt to drought conditionse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon (Citrullus lanatus L.)”
e5“Results showed that the physiology and biochemical and molecular pathways of tolerant cultivars change to adapt to drought conditions”
The same questions in other papers
drought · molecular: expression · Citrullus lanatus (watermelon)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
drought · soil: biology · Citrullus lanatus (watermelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.