Abstract
Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air. During the treatment with α-hydroxysulphonate the intercellular-space carbon dioxide concentration of the leaves increased owing to a decrease in photosynthetic activity. It seems probable that these increases in internal carbon dioxide concentration were the cause of stomatal closure, because when treated leaves were flushed with carbon dioxide free air the stomata reopened. Experimental results also showed that the accumulation of glycollate, resulting from treatment with α-hydroxysulphonate, could not be held responsible for stomatal closure because treatment with glycollate alone had no influence on either the internal carbon dioxide concentration or on the stomata of the leaves.
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 12
Claim · model-written summary
Under α-hydroxysulphonate, tobacco leaf intercellular carbon dioxide increased.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- Leavese0
- Treatment
- α-hydroxysulphonatee0
- Outcome
- intercellular-space carbon dioxide concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air. During the treatment with α-hydroxysulphonate the intercellular-space carbon dioxide concentration of the leaves increased owing to a decrease in photosynthetic activity.”
Claim · model-written summary
Under α-hydroxysulphonate, tobacco photosynthetic activity decreased.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- Leavese0
- Treatment
- α-hydroxysulphonatee0
- Outcome
- photosynthetic activitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air. During the treatment with α-hydroxysulphonate the intercellular-space carbon dioxide concentration of the leaves increased owing to a decrease in photosynthetic activity.”
Claim · model-written summary
The authors propose increased internal carbon dioxide caused stomatal closure in tobacco.
- Taxon
- tobaccoNicotiana tabacume1
- Compound
- carbon dioxidee0
- Outcome
- stomatal closuree0
- Qualifier
- seems probablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It seems probable that these increases in internal carbon dioxide concentration were the cause of stomatal closure, because when treated leaves were flushed with carbon dioxide free air the stomata reopened.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Flushing treated tobacco leaves with carbon dioxide free air reopened stomata.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- flushed with carbon dioxide free aire0
- Outcome
- stomata reopenede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It seems probable that these increases in internal carbon dioxide concentration were the cause of stomatal closure, because when treated leaves were flushed with carbon dioxide free air the stomata reopened.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Glycollate alone did not affect internal carbon dioxide in tobacco leaves.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- glycollate alonee0
- Outcome
- internal carbon dioxide concentratione0
- Direction
- no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experimental results also showed that the accumulation of glycollate, resulting from treatment with α-hydroxysulphonate, could not be held responsible for stomatal closure because treatment with glycollate alone had no influence on either the internal carbon dioxide concentration or on the stomata of the leaves.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Glycollate alone did not affect stomata in tobacco leaves.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- glycollate alonee0
- Outcome
- stomata of the leavese0
- Direction
- no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experimental results also showed that the accumulation of glycollate, resulting from treatment with α-hydroxysulphonate, could not be held responsible for stomatal closure because treatment with glycollate alone had no influence on either the internal carbon dioxide concentration or on the stomata of the leaves.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Under α-hydroxysulphonate, Xanthium pennsylvanicum leaf intercellular carbon dioxide increased.
- Taxon
- Xanthium pennsylvanicume0
- Organ / stage
- Leavese0
- Treatment
- α-hydroxysulphonatee0
- Outcome
- intercellular-space carbon dioxide concentratione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air. During the treatment with α-hydroxysulphonate the intercellular-space carbon dioxide concentration of the leaves increased owing to a decrease in photosynthetic activity.”
Claim · model-written summary
Under α-hydroxysulphonate, Xanthium pennsylvanicum photosynthetic activity decreased.
- Taxon
- Xanthium pennsylvanicume0
- Organ / stage
- Leavese0
- Treatment
- α-hydroxysulphonatee0
- Outcome
- photosynthetic activitye0
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air. During the treatment with α-hydroxysulphonate the intercellular-space carbon dioxide concentration of the leaves increased owing to a decrease in photosynthetic activity.”
Claim · model-written summary
The authors propose increased internal carbon dioxide caused stomatal closure in Xanthium pennsylvanicum.
Verbatim
e0“It seems probable that these increases in internal carbon dioxide concentration were the cause of stomatal closure, because when treated leaves were flushed with carbon dioxide free air the stomata reopened.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Flushing treated Xanthium pennsylvanicum leaves with carbon dioxide free air reopened stomata.
- Taxon
- Xanthium pennsylvanicume1
- Treatment
- flushed with carbon dioxide free aire0
- Outcome
- stomata reopenede0
Not reportedComparatorDirection
Verbatim
e0“It seems probable that these increases in internal carbon dioxide concentration were the cause of stomatal closure, because when treated leaves were flushed with carbon dioxide free air the stomata reopened.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Glycollate alone did not affect internal carbon dioxide in Xanthium pennsylvanicum leaves.
- Taxon
- Xanthium pennsylvanicume1
- Treatment
- glycollate alonee0
- Outcome
- internal carbon dioxide concentratione0
- Direction
- no influencee0
Not reportedComparator
Verbatim
e0“Experimental results also showed that the accumulation of glycollate, resulting from treatment with α-hydroxysulphonate, could not be held responsible for stomatal closure because treatment with glycollate alone had no influence on either the internal carbon dioxide concentration or on the stomata of the leaves.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
Claim · model-written summary
Glycollate alone did not affect stomata in Xanthium pennsylvanicum leaves.
- Taxon
- Xanthium pennsylvanicume1
- Treatment
- glycollate alonee0
- Outcome
- stomata of the leavese0
- Direction
- no influencee0
Not reportedComparator
Verbatim
e0“Experimental results also showed that the accumulation of glycollate, resulting from treatment with α-hydroxysulphonate, could not be held responsible for stomatal closure because treatment with glycollate alone had no influence on either the internal carbon dioxide concentration or on the stomata of the leaves.”
e1“Leaves of tobacco and Xanthium pennsylvanicum were treated with solutions of α-hydroxysulphonate and glycollate in normal air.”
The same questions in other papers
co2 · physiology: gas exchange · Nicotiana tabacum (tobacco)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
1 paper more in this group
See all 5 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.