Abstract
Abstract Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby) was fully suppressed by intermittent far-red (FR) irradiation (1 min every 30 min). When the intervening dark period was increased, a linearly increasing final germination percentage was obtained. However, a 4-day intermittent FR treatment induced phytochrome-controlled dormancy and the longer the dark interval the deeper was the dormancy of the non-germinated seeds. When seeds were soaked in a fully inhibitory osmotic solution, no dormancy was imposed. However, a single FR pulse at the time of transfer induced partial, secondary dormancy; the kinetics of the imposition of dormancy followed a negative exponential curve (half-life 1.5 days; 3 days for the cultivar Crimson Sweet). Seeds osmotreated for 10 days in darkness and subsequently dehydrated (with and without a final FR pulse) acquired germination characteristics similar to those in light-requiring and dark-germinating achenes, respectively, of the lettuce cultivar Grand Rapids. In the light-requiring osmomanipulated seed population, the induction of germination was brought about by the low-energy reaction of phytochrome, chilling, dry storage and decoating. The transformation through osmomanipulation of the dark-germinating watermelon seeds (the inhibition of which required prolonged exposure to light) to positively or negatively photosensitive seeds (that responded to brief light pulses), might be attributed to the slow relaxation of existing meta-Fa and meta-Rb phytochrome intermediates to P fr upon hydration.
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Claims 10
Claim · model-written summary
Intermittent far-red irradiation fully suppressed watermelon germination.
- Taxon
- watermelon
Citrullus lanatuse0 - Material
- Sugar Babye0
- Treatment
- intermittent far-red (FR) irradiation (1 min every 30 min)e0
- Outcome
- Seed germinatione0
- Direction
- fully suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby) was fully suppressed by intermittent far-red (FR) irradiation (1 min every 30 min)”
Claim · model-written summary
Longer dark intervals increased final germination percentage.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- intervening dark periode0
- Outcome
- final germination percentagee0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the intervening dark period was increased, a linearly increasing final germination percentage was obtained”
e1“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
Four days of intermittent far-red irradiation induced dormancy.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- 4-day intermittent FR treatmente0
- Outcome
- phytochrome-controlled dormancye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 4-day intermittent FR treatment induced phytochrome-controlled dormancy”
e1“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
Longer dark intervals deepened dormancy of nongerminated seeds.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- dark intervale0
- Outcome
- dormancy of the non-germinated seedse0
- Direction
- deepere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the longer the dark interval the deeper was the dormancy of the non-germinated seeds”
e1“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
A fully inhibitory osmotic solution imposed no dormancy.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- fully inhibitory osmotic solutione0
- Outcome
- no dormancy was imposede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When seeds were soaked in a fully inhibitory osmotic solution, no dormancy was imposed”
e1“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
A single far-red pulse at transfer induced partial secondary dormancy.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- a single FR pulse at the time of transfere0
- Outcome
- partial, secondary dormancye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a single FR pulse at the time of transfer induced partial, secondary dormancy”
e1“Seed germination of watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
Dormancy imposition had a 1.5 day half-life in Sugar Baby.
- Taxon
- Citrullus lanatusCitrullus lanatuse1
- Material
- Sugar Babye1
- Outcome
- half-lifee0
- Value
- 1.5 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the kinetics of the imposition of dormancy followed a negative exponential curve (half-life 1.5 days; 3 days for the cultivar Crimson Sweet)”
e1“Citrullus lanatus cv. Sugar Baby”
Claim · model-written summary
Dormancy imposition had a 3 day half-life in Crimson Sweet.
- Taxon
- Citrullus lanatusCitrullus lanatuse1
- Material
- Crimson Sweete0
- Outcome
- half-lifee0
- Value
- 3 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“half-life 1.5 days; 3 days for the cultivar Crimson Sweet”
e1“watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
Dark osmotic treatment followed by dehydration produced distinct photosensitivity states depending on final far-red pulse.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- osmotreated for 10 days in darkness and subsequently dehydrated (with and without a final FR pulse)e0
- Outcome
- germination characteristics similar to those in light-requiring and dark-germinating achenese0
- Comparator
- lettuce cultivar Grand Rapidse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds osmotreated for 10 days in darkness and subsequently dehydrated (with and without a final FR pulse) acquired germination characteristics similar to those in light-requiring and dark-germinating achenes, respectively, of the lettuce cultivar Grand Rapids”
e1“watermelon ( Citrullus lanatus cv. Sugar Baby)”
Claim · model-written summary
Phytochrome low-energy reaction, chilling, dry storage and decoating induced germination in light-requiring osmomanipulated seeds.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- low-energy reaction of phytochrome, chilling, dry storage and decoatinge0
- Outcome
- induction of germinatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the light-requiring osmomanipulated seed population, the induction of germination was brought about by the low-energy reaction of phytochrome, chilling, dry storage and decoating”
e1“watermelon ( Citrullus lanatus cv. Sugar Baby)”
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See all 8 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.