Abstract
Soybean seedlings (Glycine max L.) were germinated and dark-grown in water-saturated vermiculite (water potential = -0.01 megapascal) for 48 hours, then transferred either to water-saturated vermiculite or to low water potential vermiculite (water potential = -0.30 megapascal). A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite. A fourfold increase in the abscisic acid content of the elongating region was observed within 0.5 hour. At 24 hours post-transfer, hypocotyl elongation was severely arrested and abscisic acid reached its highest measured level: 3.7 nanograms per milligram dry weight (74-fold increase). A comparison of the polyA(+) RNA populations isolated at 24 hours post-transfer from the elongating region of water-saturated and low water potential vermiculite-grown seedlings was made by two-dimensional (isoelectric focusing-sodium dodecyl sulfate) polyacrylamide gel analysis of in vitro translation products. It revealed both increases and decreases in the relative amounts of a number of translation products. Rewatering seedlings grown in low water potential vermiculite at 24 hours post-transfer led to a total recovery in growth rate within 0.5 hour, while abscisic acid in the elongating hypocotyl region required 1 to 2 hours to return to uninduced levels. Application of 1.0 millimolar (+/-) abscisic acid to well-watered seedlings resulted in a 48% reduction in hypocotyl growth rate during the first 2 hours after treatment. Plants treated with abscisic acid for 24 hours had a lower polysome content than control plants. However, hypocotyl growth inhibition in abscisic acid-treated seedlings preceded the decline in polysome content.
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Claims 10
Claim · model-written summary
Hypocotyl growth rate decreased within 0.8 hour of transfer to low water potential vermiculite.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- low water potential vermiculitee1
- Outcome
- growth ratee1
- Direction
- decreasee1
- Qualifier
- within 0.8 hour post-transfere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite”
Claim · model-written summary
Abscisic acid content of the elongating hypocotyl region increased fourfold within 0.5 hour of low water potential treatment.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- elongating regione2
- Treatment
- low water potential vermiculitee1
- Outcome
- abscisic acid contente2
- Direction
- increasee2
- Value
- fourfolde2
- Qualifier
- within 0.5 houre2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite”
e2“A fourfold increase in the abscisic acid content of the elongating region was observed within 0.5 hour”
Claim · model-written summary
At 24 hours, abscisic acid reached its highest measured level of 3.7 ng per mg dry weight under low water potential, a 74-fold increase.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low water potential vermiculitee1
- Outcome
- abscisic acide3
- Direction
- higheste3
- Value
- 3.7 nanograms per milligram dry weighte3
- Qualifier
- 74-fold increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite”
e3“At 24 hours post-transfer, hypocotyl elongation was severely arrested and abscisic acid reached its highest measured level: 3.7 nanograms per milligram dry weight (74-fold increase)”
Claim · model-written summary
At 24 hours under low water potential, hypocotyl elongation was severely arrested.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low water potential vermiculitee1
- Outcome
- hypocotyl elongatione3
- Direction
- severely arrestede3
- Qualifier
- At 24 hours post-transfere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite”
e3“At 24 hours post-transfer, hypocotyl elongation was severely arrested and abscisic acid reached its highest measured level: 3.7 nanograms per milligram dry weight (74-fold increase)”
Claim · model-written summary
Low water potential at 24 hours both increased and decreased the relative amounts of a number of translation products.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low water potential vermiculitee1
- Outcome
- relative amounts of a number of translation productse4
- Direction
- increases and decreasese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“A decrease in growth rate was detectable within 0.8 hour post-transfer to low water potential vermiculite”
e4“It revealed both increases and decreases in the relative amounts of a number of translation products”
Claim · model-written summary
Rewatering led to a total recovery in hypocotyl growth rate within 0.5 hour.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Rewateringe5
- Outcome
- growth ratee5
- Direction
- total recoverye5
- Qualifier
- within 0.5 houre5
- Comparator
- low water potential vermiculitee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e5“Rewatering seedlings grown in low water potential vermiculite at 24 hours post-transfer led to a total recovery in growth rate within 0.5 hour”
Claim · model-written summary
Abscisic acid in the elongating hypocotyl region returned to uninduced levels within 1 to 2 hours after rewatering.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- elongating hypocotyl regione6
- Outcome
- abscisic acide6
- Direction
- return to uninduced levelse6
- Value
- 1 to 2 hourse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e6“while abscisic acid in the elongating hypocotyl region required 1 to 2 hours to return to uninduced levels”
Claim · model-written summary
Applied abscisic acid at 1.0 mM reduced hypocotyl growth rate by 48% in the first 2 hours.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 1.0 millimolar (+/-) abscisic acide7
- Outcome
- hypocotyl growth ratee7
- Direction
- reductione7
- Value
- 48%e7
- Qualifier
- during the first 2 hours after treatmente7
- Comparator
- well-watered seedlingse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e7“Application of 1.0 millimolar (+/-) abscisic acid to well-watered seedlings resulted in a 48% reduction in hypocotyl growth rate during the first 2 hours after treatment”
Claim · model-written summary
Abscisic acid treatment for 24 hours lowered polysome content relative to control plants.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- abscisic acid for 24 hourse1
- Outcome
- polysome contente1
- Direction
- lowere1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“Plants treated with abscisic acid for 24 hours had a lower polysome content than control plants”
Claim · model-written summary
Hypocotyl growth inhibition in abscisic acid-treated seedlings preceded the decline in polysome content.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- hypocotyl growth inhibitione1
- Qualifier
- preceded the decline in polysome contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in Soybean Hypocotyls”
e1“hypocotyl growth inhibition in abscisic acid-treated seedlings preceded the decline in polysome content”