Abstract
Abstract Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination. At this stage they were not capable of withstanding desiccation treatment. The desiccation tolerance was acquired at a stage of development which depended on the rate of water loss to which embryos were subjected. Coincident with the acquisition of tolerance to a rapid desiccation, they gained the capacity to withstand 24 h preincubation in agitated water; this acquisition could be correlated to a sharp decrease of the leaching of electrolytes, amino acids and proteins in the incubation water, suggesting that a change in membrane properties played a key role in this transition. Moreover, the acquisition of tolerance to these stresses was coincident with the increase of endogenous abscisic acid (ABA). ABA applied in vitro to young embryos induced tolerance both to desiccation and to preincubation in water: this in vitro acquisition of tolerance was again correlated with a decrease in the leakage.
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Claims 8
Claim · model-written summary
Excised sunflower embryos are capable of precocious germination as early as 7 d after pollination.
- Taxon
- Helianthus annuus
Helianthus annuuse0 - Organ / stage
- embryose0
- Outcome
- precocious germinatione0
- Qualifier
- as early as 7 d after pollinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
Claim · model-written summary
Sunflower embryos at 7 d after pollination are not capable of withstanding desiccation treatment.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Outcome
- withstanding desiccation treatmente1
- Qualifier
- At this stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e1“At this stage they were not capable of withstanding desiccation treatment”
Claim · model-written summary
Desiccation tolerance of sunflower embryos is acquired at a developmental stage that depends on the rate of water loss.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- rate of water losse2
- Outcome
- desiccation tolerancee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e2“The desiccation tolerance was acquired at a stage of development which depended on the rate of water loss to which embryos were subjected”
Claim · model-written summary
Acquisition of tolerance in sunflower embryos could be correlated with a sharp decrease in leaching of electrolytes, amino acids and proteins during 24 h preincubation in agitated water.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- 24 h preincubation in agitated watere3
- Outcome
- leaching of electrolytes, amino acids and proteinse3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e3“Coincident with the acquisition of tolerance to a rapid desiccation, they gained the capacity to withstand 24 h preincubation in agitated water; this acquisition could be correlated to a sharp decrease of the leaching of electrolytes, amino acids and proteins in the incubation water”
Claim · model-written summary
A change in membrane properties may play a key role in the acquisition of water stress tolerance in sunflower embryos.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Outcome
- acquisition of tolerancee3
- Qualifier
- a change in membrane propertiese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e3“Coincident with the acquisition of tolerance to a rapid desiccation, they gained the capacity to withstand 24 h preincubation in agitated water; this acquisition could be correlated to a sharp decrease of the leaching of electrolytes, amino acids and proteins in the incubation water, suggesting that a change in membrane properties played a key role in this transition”
Claim · model-written summary
Acquisition of tolerance in sunflower embryos is coincident with an increase in endogenous abscisic acid (ABA).
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- these stressese4
- Outcome
- endogenous abscisic acid (ABA)e4
- Direction
- increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e4“Moreover, the acquisition of tolerance to these stresses was coincident with the increase of endogenous abscisic acid (ABA)”
Claim · model-written summary
ABA applied in vitro to young sunflower embryos induces tolerance to desiccation and to preincubation in water.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Organ / stage
- young embryose5
- Treatment
- ABA applied in vitroe5
- Outcome
- tolerancee5
- Direction
- inducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e5“ABA applied in vitro to young embryos induced tolerance both to desiccation and to preincubation in water”
Claim · model-written summary
In vitro ABA treatment of sunflower embryos is correlated with a decrease in leakage.
- Taxon
- Helianthus annuusHelianthus annuuse0
- Treatment
- ABA applied in vitroe5
- Outcome
- leakagee6
- Direction
- decreasee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised Helianthus annuus embryos were capable of precocious germination as early as 7 d after pollination”
e5“ABA applied in vitro to young embryos induced tolerance both to desiccation and to preincubation in water”
e6“this in vitro acquisition of tolerance was again correlated with a decrease in the leakage”
The same questions in other papers
in vitro · disease · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
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.