Abstract
The effects of incorporating plant growth regulators into the priming solution on low temperature germination and emergence performance of watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai. cv. Crimson Sweet] seeds were investigated. Seeds were primed in 2.5% (0.25 M) KNO 3 solution for 6 d at 25°C in darkness containing one of the following: 1, 3 or 5 µM methyl jasmonate (MeJA), or 1, 3 or 5 mM spermine. Following priming, seeds were subjected to germination and emergence tests at 15°C. Priming watermelon seeds in the presence or absence of plant growth regulators significantly improved germination percentage and rate at 15°C compared to untreated seeds, which failed to germinate. Seeds primed in KNO 3 solution containing 1 or 3 µM of MeJA had significantly higher germination percentages, 96 and 85%, respectively, compared to seeds primed in KNO 3 only (69%). Germination rate and synchrony were improved by 1 and 3 µM of MeJA added to the priming solution. Emergence was enhanced by priming seeds in the presence of 1 µM (75%) and 3 µM (63%) MeJA compared to seeds primed in KNO 3 solution, (35%) while non-primed seeds were unable to emerge at 15°C. Inclusion of spermine at all three concentrations into the priming solution did not significantly improve germination and emergence characteristics of watermelon seeds compared to seeds that were primed in KNO 3 solution only. Therefore, priming watermelon seeds in 1 or 3 µM of MeJA incorporated into the KNO 3 solution can be used as an effective method to improve low temperature performance of watermelon seeds. Key words: Watermelon, methyl jasmonate, polyamines, germination, emergence.
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Claims 9
Claim · model-written summary
Priming improved watermelon seed germination percentage and rate at 15°C relative to untreated seeds, which failed to germinate.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- Priminge0
- Outcome
- germination percentage and ratee0
- Direction
- improvede0
- Comparator
- untreated seedse0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming watermelon seeds in the presence or absence of plant growth regulators significantly improved germination percentage and rate at 15°C compared to untreated seeds, which failed to germinate.”
Claim · model-written summary
Priming with 1 µM MeJA yielded 96% germination, higher than 69% with KNO 3 alone.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 1 or 3 µM of MeJAe0
- Outcome
- germination percentagese0
- Direction
- highere0
- Value
- 96e0
- Qualifier
- 69%e0
- Comparator
- seeds primed in KNO 3 onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds primed in KNO 3 solution containing 1 or 3 µM of MeJA had significantly higher germination percentages, 96 and 85%, respectively, compared to seeds primed in KNO 3 only (69%).”
t0“watermelon seeds”
Claim · model-written summary
Priming with 3 µM MeJA yielded 85% germination, higher than 69% with KNO 3 alone.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 1 or 3 µM of MeJAe0
- Outcome
- germination percentagese0
- Direction
- highere0
- Value
- 85%e0
- Qualifier
- 69%e0
- Comparator
- seeds primed in KNO 3 onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds primed in KNO 3 solution containing 1 or 3 µM of MeJA had significantly higher germination percentages, 96 and 85%, respectively, compared to seeds primed in KNO 3 only (69%).”
t0“watermelon seeds”
Claim · model-written summary
Adding 1 µM MeJA to priming improved germination rate and synchrony.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 1 and 3 µM of MeJAe0
- Outcome
- Germination rate and synchronye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination rate and synchrony were improved by 1 and 3 µM of MeJA added to the priming solution.”
t0“watermelon seeds”
Claim · model-written summary
Priming with 1 µM MeJA increased emergence to 75% versus 35% with KNO 3 alone.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 1 µMe0
- Outcome
- Emergencee0
- Direction
- enhancede0
- Value
- 75%e0
- Qualifier
- 35%e0
- Comparator
- seeds primed in KNO 3 solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence was enhanced by priming seeds in the presence of 1 µM (75%) and 3 µM (63%) MeJA compared to seeds primed in KNO 3 solution, (35%) while non-primed seeds were unable to emerge at 15°C.”
t0“watermelon seeds”
Claim · model-written summary
Priming with 3 µM MeJA increased emergence to 63% versus 35% with KNO 3 alone.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- 3 µMe0
- Outcome
- Emergencee0
- Direction
- enhancede0
- Value
- 63%e0
- Qualifier
- 35%e0
- Comparator
- seeds primed in KNO 3 solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence was enhanced by priming seeds in the presence of 1 µM (75%) and 3 µM (63%) MeJA compared to seeds primed in KNO 3 solution, (35%) while non-primed seeds were unable to emerge at 15°C.”
t0“watermelon seeds”
Claim · model-written summary
Non-primed watermelon seeds did not emerge at 15°C.
- Taxon
- watermelonCitrullus lanatust0
- Outcome
- unable to emergee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-primed seeds were unable to emerge at 15°C”
t0“watermelon seeds”
Claim · model-written summary
Spermine at all three tested concentrations did not significantly improve watermelon seed germination or emergence versus KNO 3 priming alone.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- spermine at all three concentrationse0
- Outcome
- germination and emergence characteristicse0
- Direction
- did not significantly improvee0
- Comparator
- seeds that were primed in KNO 3 solution onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inclusion of spermine at all three concentrations into the priming solution did not significantly improve germination and emergence characteristics of watermelon seeds compared to seeds that were primed in KNO 3 solution only.”
Claim · model-written summary
The authors recommend 1 or 3 µM MeJA in KNO 3 priming solution for improved low-temperature watermelon seed performance.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 1 or 3 µM of MeJA incorporated into the KNO 3 solutione0
- Outcome
- improve low temperature performance of watermelon seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming watermelon seeds in 1 or 3 µM of MeJA incorporated into the KNO 3 solution can be used as an effective method to improve low temperature performance of watermelon seeds.”
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seed treatment · growth · Citrullus lanatus (watermelon)Positive and negative results
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