Abstract
A greenhouse study, designed in a randomized complete block design with five replications, was carried out at Clemson University, Clemson, SC, USA, in the spring of 1997. The objective of the study was to investigate whether abscisic acid (ABA) would mitigate chilling damages in the watermelon, a chilling-sensitive plant. 'Crimson Sweet' [Citrullus lanatus (Thumb) Matsum. & Nakai.] watermelon seedlings were grown in a greenhouse with a temperature regime of 25ºC (day) and 20ºC (night). Five-day-old seedlings were sprayed with 10-4 M cis, trans-abscisic acid 15 hours prior to being exposed to 1.5 ± 0.5ºC for 24 hours in a dark refrigerator. One and two weeks after the chilling exposure, seedlings were visually inspected and rated in order to estimate the extent of chilling injury, and their shoot and root fresh and dry weights were determined. As indicated by higher injury rating values, chilling caused significant visual damage on the plants that were not sprayed with ABA. Plants that were not treated with ABA had significantly lower shoot and root fresh and dry weights compared to plants that were sprayed with ABA prior to chilling exposure. Although the application of ABA did not protect the seedlings completely against chilling injury, chilling tolerance in cold-sensitive plants can be increased with the application of ABA or its analogs.
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Claims 3
Claim · model-written summary
Chilling significantly increased visible injury in watermelon seedlings without ABA.
- Taxon
- watermelon
Citrullus lanatuse1 - Treatment
- chillinge0
- Outcome
- visual damagee0
- Direction
- causede0
- Comparator
- plants that were not sprayed with ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chilling caused significant visual damage on the plants that were not sprayed with ABA”
e1“watermelon seedlings”
Claim · model-written summary
Without ABA, chilled watermelon seedlings had significantly lower shoot and root fresh and dry weights than ABA sprayed seedlings.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- sprayed with ABAe0
- Outcome
- shoot and root fresh and dry weightse0
- Direction
- lowere0
- Comparator
- Plants that were not treated with ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants that were not treated with ABA had significantly lower shoot and root fresh and dry weights compared to plants that were sprayed with ABA prior to chilling exposure”
e1“watermelon seedlings”
Claim · model-written summary
The authors concluded ABA increased chilling tolerance but did not fully protect seedlings.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- application of ABAe0
- Outcome
- chilling tolerancee0
- Direction
- increasede0
- Qualifier
- did not protect the seedlings completelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although the application of ABA did not protect the seedlings completely against chilling injury, chilling tolerance in cold-sensitive plants can be increased with the application of ABA or its analogs.”
e1“watermelon seedlings”
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cold · pest · Citrullus lanatus (watermelon)Positive and negative results
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application · growth · Citrullus lanatus (watermelon)Positive and negative results
12 papers in the same direction as this paper · 3 in the opposite direction
- no effect
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See all 16 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.