Abstract
The dark-germinating seeds of cucumber (Cucumis sativus L. cv. Saharanpur Long green) developed secondary dormancy when given two brief far-red light (FR) irradiations during a 4 d incubation in osmoticum at 20°C. Acetone treatment of seeds was found not only to break FR-induced dormancy but also to prevent its development. The progressive effect of increasing the duration of treatment or the concentrations of acetone, as well as an appreciable activity of the latter, irrespective of its application to dry or hydrated seeds, is consistent with the Taylorson hypothesis of anaesthetic action at the membrane level. Contrary to the general consensus that it is only the cells of the embryo which respond to an active dormancy-breaking factor, termination of dormancy as well as prevention of its development by acetone in cucumber seeds was accompanied by a striking change in the permeability of the cell membranes of the perisperm-endosperm envelope enclosing the embryo. This change in the permeability of the cell membranes brought about by acetone appeared to be permanent in nature as it was not affected by hydration or dehydration of the treated seeds.
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Claims 6
Claim · model-written summary
Two far-red irradiations induced secondary dormancy in cucumber seeds during osmotic incubation.
- Taxon
- cucumber
Cucumis sativuse0 - Material
- Saharanpur Long greene0
- Organ / stage
- seedse0
- Treatment
- two brief far-red light (FR) irradiationse0
- Outcome
- secondary dormancye0
- Direction
- developede0
- Qualifier
- during a 4 d incubation in osmoticum at 20°Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dark-germinating seeds of cucumber (Cucumis sativus L. cv. Saharanpur Long green) developed secondary dormancy when given two brief far-red light (FR) irradiations during a 4 d incubation in osmoticum at 20°C.”
Claim · model-written summary
Acetone broke far-red-induced dormancy in cucumber seeds.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- seedse0
- Treatment
- Acetone treatmente0
- Outcome
- FR-induced dormancye0
- Direction
- breake0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acetone treatment of seeds was found not only to break FR-induced dormancy but also to prevent its development.”
t0“Seeds of Cucumber”
Claim · model-written summary
Acetone prevented development of far-red-induced dormancy in cucumber seeds.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- seedse0
- Treatment
- Acetone treatmente0
- Outcome
- FR-induced dormancye0
- Direction
- prevente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acetone treatment of seeds was found not only to break FR-induced dormancy but also to prevent its development.”
t0“Seeds of Cucumber”
Claim · model-written summary
Longer acetone exposure or higher concentration progressively strengthened its dormancy effect, including application to dry or hydrated cucumber seeds.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- seedse0
- Treatment
- acetonee0
- Outcome
- progressive effecte0
- Direction
- increasinge0
- Qualifier
- dry or hydrated seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The progressive effect of increasing the duration of treatment or the concentrations of acetone, as well as an appreciable activity of the latter, irrespective of its application to dry or hydrated seeds”
t0“Seeds of Cucumber”
Claim · model-written summary
Acetone-associated dormancy termination and prevention accompanied a striking permeability change in the cucumber perisperm-endosperm envelope.
- Taxon
- cucumberCucumis sativuse0
- Organ / stage
- perisperm-endosperm envelopee0
- Treatment
- acetonee0
- Outcome
- permeability of the cell membranese0
- Direction
- changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“termination of dormancy as well as prevention of its development by acetone in cucumber seeds was accompanied by a striking change in the permeability of the cell membranes of the perisperm-endosperm envelope enclosing the embryo.”
Claim · model-written summary
The acetone-associated permeability change persisted through hydration and dehydration of treated cucumber seeds.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- seedse0
- Treatment
- acetonee0
- Outcome
- permeability of the cell membranese0
- Direction
- not affectede0
- Qualifier
- hydration or dehydratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This change in the permeability of the cell membranes brought about by acetone appeared to be permanent in nature as it was not affected by hydration or dehydration of the treated seeds.”
t0“Seeds of Cucumber”
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