Abstract
UV-B (UV) induced changes in PAL activity and UV-absorbing compounds were followed in cotton after 1 to 9 days and in cucumber after 1 to 14 days. UV increased PAL activity in the lower hypocotyl (LH) of cotton but had no effect on the upper portion. In general, PAL decreased with time, but UV treatment slowed that decline in the LH portion. Anthocyanin concentration declined with time in both portions. In cucumber cotyledons, UV had no effect on PAL. In cucumber leaves, there was no overall effect of UV; but there were significant interactions with time. In both cotyledons and in leaves, PAL decreased with time. As in LH cotton tissue, UV slowed the rate of decline of PAL in cucumber leaves. In leaves, UV absorbing compounds (at 330 nm) were increased by UV; in cotyledons, the increase in absorption was greater in controls than in UV-B irradiated seedlings. In cotton, changes in anthocyanins mirrored those in PAL, this was not the case for UV absorbing compounds in either species.
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 14
Claim · model-written summary
UV-B increased PAL activity in the lower hypocotyl of cotton.
- Taxon
- cotton
Gossypium hirsutume0 - Organ / stage
- lower hypocotyl (LH)e0
- Treatment
- UVe0
- Outcome
- PAL activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV increased PAL activity in the lower hypocotyl (LH) of cotton but had no effect on the upper portion”
Claim · model-written summary
UV-B had no effect on PAL activity in the upper portion of the cotton hypocotyl.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- upper portione0
- Treatment
- UVe0
- Outcome
- PAL activitye0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV increased PAL activity in the lower hypocotyl (LH) of cotton but had no effect on the upper portion”
Claim · model-written summary
PAL activity decreased with time in cotton and cucumber seedlings.
- Taxon
- cotton and cucumberGossypium hirsutum
Cucumis sativust0 - Treatment
- timee1
- Outcome
- PALe1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON AND CUCUMBER SEEDLINGS”
e1“In general, PAL decreased with time, but UV treatment slowed that decline in the LH portion”
Claim · model-written summary
UV treatment slowed the decline of PAL activity in the lower hypocotyl of cotton.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- LH portione1
- Treatment
- UV treatmente1
- Outcome
- declinee1
- Direction
- slowede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV increased PAL activity in the lower hypocotyl (LH) of cotton but had no effect on the upper portion”
e1“In general, PAL decreased with time, but UV treatment slowed that decline in the LH portion”
Claim · model-written summary
Anthocyanin concentration declined with time in cotton and cucumber seedlings.
- Taxon
- cotton and cucumberGossypium hirsutumCucumis sativust0
- Treatment
- timee2
- Outcome
- Anthocyanin concentratione2
- Direction
- declinede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON AND CUCUMBER SEEDLINGS”
e2“Anthocyanin concentration declined with time in both portions”
Claim · model-written summary
UV had no effect on PAL activity in cucumber cotyledons.
- Taxon
- cucumberCucumis sativuse3
- Organ / stage
- cotyledonse3
- Treatment
- UVe3
- Outcome
- PALe3
- Direction
- no effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In cucumber cotyledons, UV had no effect on PAL”
Claim · model-written summary
UV had no overall effect on PAL activity in cucumber leaves.
- Taxon
- cucumberCucumis sativuse4
- Organ / stage
- leavese4
- Treatment
- UVe4
- Outcome
- overall effecte4
- Direction
- no overall effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In cucumber leaves, there was no overall effect of UV; but there were significant interactions with time”
Claim · model-written summary
UV significantly interacted with time in cucumber leaves.
- Taxon
- cucumberCucumis sativuse4
- Treatment
- timee4
- Outcome
- interactionse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In cucumber leaves, there was no overall effect of UV; but there were significant interactions with time”
Claim · model-written summary
PAL activity decreased with time in cucumber cotyledons and leaves.
- Taxon
- cucumberCucumis sativuse3
- Treatment
- timee5
- Outcome
- PALe5
- Direction
- decreasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In cucumber cotyledons, UV had no effect on PAL”
e5“In both cotyledons and in leaves, PAL decreased with time”
Claim · model-written summary
UV slowed the rate of decline of PAL activity in cucumber leaves.
- Taxon
- cucumberCucumis sativuse6
- Organ / stage
- leavese6
- Treatment
- UVe6
- Outcome
- rate of decline of PALe6
- Direction
- slowede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“As in LH cotton tissue, UV slowed the rate of decline of PAL in cucumber leaves”
Claim · model-written summary
UV increased UV-absorbing compounds at 330 nm in cucumber leaves.
- Taxon
- cucumberCucumis sativuse4
- Organ / stage
- leavese7
- Treatment
- UVe7
- Outcome
- UV absorbing compoundse7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In cucumber leaves, there was no overall effect of UV; but there were significant interactions with time”
e7“In leaves, UV absorbing compounds (at 330 nm) were increased by UV”
Claim · model-written summary
UV-absorbing compound absorption increased more in cucumber cotyledons of controls than in UV-B irradiated seedlings.
- Taxon
- cucumberCucumis sativuse3
- Organ / stage
- cotyledonse1
- Treatment
- UV-B irradiated seedlingse1
- Outcome
- increase in absorptione1
- Direction
- greatere1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In cucumber cotyledons, UV had no effect on PAL”
e1“in cotyledons, the increase in absorption was greater in controls than in UV-B irradiated seedlings”
Claim · model-written summary
Changes in anthocyanins in cotton mirrored those in PAL.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- changes in anthocyaninse1
- Direction
- mirrorede1
- Comparator
- PALe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In cotton, changes in anthocyanins mirrored those in PAL, this was not the case for UV absorbing compounds in either species”
Claim · model-written summary
Changes in UV-absorbing compounds did not mirror PAL changes in either cotton or cucumber.
- Taxon
- cotton and cucumberGossypium hirsutumCucumis sativust0
- Outcome
- UV absorbing compoundse1
- Direction
- not the casee1
- Comparator
- changes in anthocyaninse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“COTTON AND CUCUMBER SEEDLINGS”
e1“In cotton, changes in anthocyanins mirrored those in PAL, this was not the case for UV absorbing compounds in either species”
The same questions in other papers
uv · molecular: metabolites · Cucumis sativus (cucumber)Positive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →uv · molecular: metabolites · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.