Abstract
Cotyledons of watermelon ( Citrullus vulgaris Schrad. cv. Fairfax) were excised from the embryo after 24 h of imbibition and cultured for several days on filter paper with water or abscisic acid (ABA) solution. In some experiments the cotyledons were pretreated with benzyladenine (BA) for times ranging from 5 min to 2 h before transfer to ABA. A treatment with 10 −5 M ABA blocked all developmental parameters examined (growth and increase in appropriate markers for glyoxysome, peroxisome and plastid development). This blocking can be prevented by an initial treatment with 10 −4 M BA for 2 h. This pretreatment with BA overrides the action of ABA: the final developmental responses are not just restored to the level of the water control, but they are almost as high as those obtained by treating the cotyledons with BA only. If BA is administered for three days together with ABA the reversal of inhibition is much less efficient.
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Claims 4
Claim · model-written summary
ABA blocked cotyledon growth and glyoxysome, peroxisome and plastid development markers.
- Taxon
- watermelon
Citrullus lanatust0 - Organ / stage
- cotyledonst0
- Treatment
- 10 −5 M ABAe0
- Outcome
- growth and increase in appropriate markers for glyoxysome, peroxisome and plastid developmente0
- Direction
- blockede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A treatment with 10 −5 M ABA blocked all developmental parameters examined (growth and increase in appropriate markers for glyoxysome, peroxisome and plastid development).”
t0“watermelon cotyledons”
Claim · model-written summary
A two-hour BA pretreatment prevented ABA blocking of cotyledon development.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- cotyledonst0
- Treatment
- 10 −4 M BA for 2 he0
- Outcome
- blockinge0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This blocking can be prevented by an initial treatment with 10 −4 M BA for 2 h.”
t0“watermelon cotyledons”
Claim · model-written summary
BA pretreatment produced responses above water control and nearly as high as BA alone.
- Taxon
- watermelonCitrullus lanatust0
- Organ / stage
- cotyledonst0
- Treatment
- BA onlye0
- Outcome
- final developmental responsese0
- Direction
- almost as highe0
- Comparator
- water controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the final developmental responses are not just restored to the level of the water control, but they are almost as high as those obtained by treating the cotyledons with BA only.”
t0“watermelon cotyledons”
Claim · model-written summary
BA administered with ABA for three days reversed inhibition less efficiently.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- BA is administered for three days together with ABAe0
- Outcome
- reversal of inhibitione0
- Direction
- much less efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If BA is administered for three days together with ABA the reversal of inhibition is much less efficient.”
t0“watermelon cotyledons”
The same questions in other papers
(+)-abscisic acid · growth · Citrullus lanatus (watermelon)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 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.