Abstract
Abstract Watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] cultivars Charleston Gray (CG), Crimson Sweet (CS), Dixielee (DL), Jubilee (JL), Mirage (MG), and Starbrite (SB) were grown in white quartz flintshot sand and watered daily with 0.01M sodium acetate buffer at pH 4.0, 4.5,5.0, 5.5, 5.0, or 6.5. After 14 days, stem length, leaf area, leaf, shoot and root dry weight, and number of lateral roots were measured. Number of roots increased with increasing pH from 4.0 to 5.0 in all cultivars except DL and CG. The number of roots of CG decreased with increasing pH. The number of roots of MG and SB had positive linear and quadratic correlations, respectively, with increasing pH. In all cultivars, root dry weight decreased with increasing pH from 4.0 to 5.5. At pH ≤4.5, all cultivars except CG had short or no tap roots and thickened lateral roots. CG had a decrease in stem length, leaf dry weight and area, and shoot dry weight with increasing pH, and was sensitive to high pH. However, MG and SB had an increase in leaf dry weight and area with increasing pH, which suggested that MG and SB are sensitive to low pH. Although no differences in shoot parameters of 14‐day‐old plants were detected among CS, DL and JL, observations made 7 days after seeding indicated a possible pH effect on early growth of seedlings.
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Claims 7
Claim · model-written summary
Lateral root number increased from pH 4.0 to 5.0 in watermelon cultivars except Dixielee and Charleston Gray.
- Taxon
- watermelon
Citrullus lanatust0 - Outcome
- Number of rootse0
- Direction
- increasede0
- Setting
- pH from 4.0 to 5.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of roots increased with increasing pH from 4.0 to 5.0 in all cultivars except DL and CG.”
t0“watermelon”
Claim · model-written summary
Charleston Gray root number decreased with increasing pH.
- Taxon
- watermelonCitrullus lanatust0
- Material
- CGe0
- Outcome
- number of rootse0
- Direction
- decreasede0
- Setting
- increasing pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of roots of CG decreased with increasing pH.”
t0“watermelon”
Claim · model-written summary
Root dry weight fell with increasing pH from 4.0 to 5.5 in all watermelon cultivars.
- Taxon
- watermelonCitrullus lanatust0
- Outcome
- root dry weighte0
- Direction
- decreasede0
- Setting
- increasing pH from 4.0 to 5.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all cultivars, root dry weight decreased with increasing pH from 4.0 to 5.5.”
t0“watermelon”
Claim · model-written summary
At pH 4.5 or less, all cultivars except Charleston Gray had short or absent tap roots and thickened lateral roots.
- Taxon
- watermelonCitrullus lanatust0
- Outcome
- short or no tap roots and thickened lateral rootse0
- Setting
- pH ≤4.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At pH ≤4.5, all cultivars except CG had short or no tap roots and thickened lateral roots.”
t0“watermelon”
Claim · model-written summary
Charleston Gray stem length, leaf dry weight and area, and shoot dry weight declined with increasing pH.
- Taxon
- watermelonCitrullus lanatust0
- Material
- CGe0
- Outcome
- stem length, leaf dry weight and area, and shoot dry weighte0
- Direction
- decreasee0
- Setting
- increasing pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CG had a decrease in stem length, leaf dry weight and area, and shoot dry weight with increasing pH”
t0“watermelon”
Claim · model-written summary
Mirage and Starbrite leaf dry weight and area rose with increasing pH.
- Taxon
- watermelonCitrullus lanatust0
- Material
- MG and SBe0
- Outcome
- leaf dry weight and areae0
- Direction
- increasee0
- Setting
- increasing pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MG and SB had an increase in leaf dry weight and area with increasing pH”
t0“watermelon”
Claim · model-written summary
No shoot parameter differences were detected among Crimson Sweet, Dixielee and Jubilee at day 14.
- Taxon
- watermelonCitrullus lanatust0
- Material
- CS, DL and JLe0
- Outcome
- shoot parameterse0
- Direction
- no differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no differences in shoot parameters of 14‐day‐old plants were detected among CS, DL and JL”
t0“watermelon”