Abstract
ABSTRACT Excess salts in water used for irrigation in the semi-arid region cause losses in growth and yield of cucurbits, such as watermelon. However, the choice of salinity-tolerant varieties can reduce the impact of stress on crop yield. Thus, the objective of this study was to evaluate the tolerance of watermelon varieties to irrigation water salinity during initial development. The experiment was conducted in a protected environment located at the Federal Rural University of the Semi-arid Region, Mossoró, RN, Brazil, in a randomized block experimental design in a 7 x 3 factorial scheme with four replicates, consisting of seven cultivars (Rochedo F1, Crimson Select, Charleston Gray, Fairfax, Crimson Sweet, Sugar Baby, Preciosa) and three irrigation water salinity levels (0.5, 4.5, and 9.0 dS m-1). Increasing irrigation water salinity reduced emergence, growth, and dry mass accumulation in seedlings. There was a tendency for photosynthetic pigments of watermelon seedlings to increase with increasing salts in the irrigation water, indicating that the time of exposure to salt stress was not sufficient to significantly reduce the levels of chlorophyll a, chlorophyll b and total chlorophyll. The Rochedo F1, Crimson Select and Fairfax varieties showed greater tolerance to salinity, while Sugar Baby and Preciosa were classified as moderately sensitive to electrical conductivity levels of 4.5 and 9.0 dS m-1 in the irrigation water.
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Claims 6
Claim · model-written summary
Increasing irrigation water salinity reduced seedling emergence.
- Taxon
- watermelon
Citrullus lanatust0 - Organ / stage
- seedlingse0
- Treatment
- Increasing irrigation water salinitye0
- Outcome
- emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing irrigation water salinity reduced emergence, growth, and dry mass accumulation in seedlings”
t0“watermelon varieties”
Claim · model-written summary
Increasing irrigation water salinity reduced seedling growth and dry mass accumulation.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- seedlingse0
- Treatment
- Increasing irrigation water salinitye0
- Outcome
- growth, and dry mass accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing irrigation water salinity reduced emergence, growth, and dry mass accumulation in seedlings”
t0“watermelon varieties”
Claim · model-written summary
Photosynthetic pigments tended to increase with irrigation water salts.
- Taxon
- watermelonCitrullus lanatuse0
- Organ / stage
- seedlingse0
- Treatment
- increasing salts in the irrigation watere0
- Outcome
- photosynthetic pigmentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a tendency for photosynthetic pigments of watermelon seedlings to increase with increasing salts in the irrigation water”
Claim · model-written summary
Salt exposure did not significantly reduce chlorophyll a, chlorophyll b or total chlorophyll.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- salt stresse0
- Outcome
- levels of chlorophyll a, chlorophyll b and total chlorophylle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the time of exposure to salt stress was not sufficient to significantly reduce the levels of chlorophyll a, chlorophyll b and total chlorophyll”
e1“watermelon seedlings”
Claim · model-written summary
Rochedo F1, Crimson Select and Fairfax showed greater salinity tolerance.
- Taxon
- watermelonCitrullus lanatust0
- Material
- Rochedo F1, Crimson Select and Fairfaxe0
- Outcome
- tolerance to salinitye0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Rochedo F1, Crimson Select and Fairfax varieties showed greater tolerance to salinity”
t0“watermelon varieties”
Claim · model-written summary
Sugar Baby and Preciosa were moderately sensitive at 4.5 and 9.0 dS m-1.
- Taxon
- watermelonCitrullus lanatust0
- Material
- Sugar Baby and Preciosae0
- Outcome
- moderately sensitivee0
- Qualifier
- 4.5 and 9.0 dS m-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar Baby and Preciosa were classified as moderately sensitive to electrical conductivity levels of 4.5 and 9.0 dS m-1 in the irrigation water”
t0“watermelon varieties”
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See all 22 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.