Abstract
Summary Trials were carried out in order to investigate the effect of hypoxia on seed germination of Datura stramonium L. in Petri dishes and when buried at various depths in soil. Hypoxia was found to cause a decrease in germination capacity and germination rate. This inhibition was partially alleviated by daily exchange of hypoxic gas surrounding the seeds during incubation. Similarly, seed scarification allowed maintenance of a higher germination capacity under conditions of low oxygen availability, showing that the seed coat was only partially gas permeable. Oxygen deficiency led to a decrease in respiratory capacity. However, this was probably compensated for by induction of fermentation metabolism. The possibility of removing the final products of fermentation exerts a decisive influence on seed germination, especially in an environment such as soil, where their diffusion into the surrounding environment is restricted. Thus daily nitrogen flushing partially eliminated this inhibition, even under conditions of low external oxygen availability. It was therefore postulated that the main depth–derived inhibition was not caused directly by oxygen deficiency but by the increasing difficulty in eliminating toxic fermentation products, which was found to be proportional to the degree of hypoxia. Finally, incubation for several days under completely anaerobic conditions induced secondary dormancy. This was probably due to an ecological adaptation mechanism that prevents germination under conditions that are unfavourable for survival.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Hypoxia decreased germination capacity and germination rate of Datura stramonium seeds.
- Taxon
- Datura stramonium L.
.jpg?width=60)
Datura stramoniume0 - Treatment
- hypoxiae1
- Outcome
- germination capacity and germination ratee1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e1“Hypoxia was found to cause a decrease in germination capacity and germination rate”
Claim · model-written summary
Daily exchange of hypoxic gas around the seeds partially alleviated the hypoxia inhibition of germination.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- daily exchange of hypoxic gase2
- Outcome
- inhibitione2
- Direction
- partially alleviatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e2“This inhibition was partially alleviated by daily exchange of hypoxic gas surrounding the seeds during incubation”
Claim · model-written summary
Scarification maintained a higher germination capacity of Datura stramonium seeds under low oxygen availability.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- seed scarificatione3
- Outcome
- germination capacitye3
- Direction
- highere3
- Qualifier
- under conditions of low oxygen availabilitye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e3“seed scarification allowed maintenance of a higher germination capacity under conditions of low oxygen availability”
Claim · model-written summary
Oxygen deficiency decreased the respiratory capacity of Datura stramonium seeds.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- Oxygen deficiencye4
- Outcome
- respiratory capacitye4
- Direction
- decreasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e4“Oxygen deficiency led to a decrease in respiratory capacity”
Claim · model-written summary
Oxygen deficiency probably decreased respiratory capacity, which was compensated for by induced fermentation metabolism.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Outcome
- respiratory capacitye4
- Qualifier
- induction of fermentation metabolisme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e4“Oxygen deficiency led to a decrease in respiratory capacity”
e5“However, this was probably compensated for by induction of fermentation metabolism”
Claim · model-written summary
The depth-derived inhibition of germination is postulated to result from difficulty in eliminating toxic fermentation products rather than from oxygen deficiency itself.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Outcome
- depth–derived inhibitione6
- Qualifier
- increasing difficulty in eliminating toxic fermentation productse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e6“the main depth–derived inhibition was not caused directly by oxygen deficiency but by the increasing difficulty in eliminating toxic fermentation products”
Claim · model-written summary
The difficulty in eliminating toxic fermentation products was proportional to the degree of hypoxia.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- degree of hypoxiae7
- Outcome
- difficulty in eliminating toxic fermentation productse7
- Direction
- proportionale7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e7“the increasing difficulty in eliminating toxic fermentation products, which was found to be proportional to the degree of hypoxia”
Claim · model-written summary
Daily nitrogen flushing partially eliminated the hypoxia inhibition of germination, even at low external oxygen availability.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- daily nitrogen flushinge3
- Outcome
- inhibitione3
- Direction
- partially eliminatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e3“daily nitrogen flushing partially eliminated this inhibition, even under conditions of low external oxygen availability”
Claim · model-written summary
Incubation for several days under completely anaerobic conditions induced secondary dormancy.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Treatment
- incubation for several days under completely anaerobic conditionse4
- Outcome
- secondary dormancye4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e4“incubation for several days under completely anaerobic conditions induced secondary dormancy”
Claim · model-written summary
Secondary dormancy under anaerobic conditions is probably an ecological adaptation that prevents germination in unfavourable conditions.
- Taxon
- Datura stramonium L.Datura stramoniume0
- Outcome
- secondary dormancye4
- Qualifier
- ecological adaptation mechanisme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of hypoxia on seed germination of Datura stramonium L.”
e4“incubation for several days under completely anaerobic conditions induced secondary dormancy”
e5“This was probably due to an ecological adaptation mechanism that prevents germination under conditions that are unfavourable for survival”
The same questions in other papers
seed treatment · growth · Datura stramonium (jimsonweed)Results agree
1 paper in the same direction as this paper
- 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.