Abstract
The response of plants to stress such as UV-radiation or drought highly depends on the species, cultivar, plant organ, developmental stage, and furthermore, is influenced by ecophysiological interactions. Drought stress as well as UV irradiation are the most adverse factors for plant growth and productivity. In the present study, the interactive effect of UV-B and drought stress on biomass, primary and secondary metabolites, and mediated enzyme activity of phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) was investigated in lettuce (Lactuca sativa L.). It was found that biomass production decreased in response to both stressors, while dry matter, total phenolic contents and the flavonol quercetin were not significantly affected by UV-B and drought stress, neither solely nor in combination. In contrast, anthocyanins and luteolin accumulated only in response to drought stress. However, the precursor amino acid proline as well as the activity of PAL increased under conditions of increased UV-B and water deficit. Thus, the present results deduce that both stressors acted either synergistically or to some extent antagonistically in terms of inducing plant protective mechanisms.
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 8
Claim · model-written summary
Biomass production decreased under UV-B and drought stress.
- Taxon
- lettuce (Lactuca sativa L.)
Lactuca sativat0 - Treatment
- both stressorse0
- Outcome
- biomass productione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass production decreased in response to both stressors”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Dry matter was not significantly affected by UV-B or drought alone or combined.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- UV-B and drought stresse0
- Outcome
- dry mattere0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter, total phenolic contents and the flavonol quercetin were not significantly affected by UV-B and drought stress, neither solely nor in combination.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Total phenolic contents were not significantly affected by UV-B or drought alone or combined.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- UV-B and drought stresse0
- Outcome
- total phenolic contentse0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter, total phenolic contents and the flavonol quercetin were not significantly affected by UV-B and drought stress, neither solely nor in combination.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Quercetin was not significantly affected by UV-B or drought alone or combined.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- UV-B and drought stresse0
- Outcome
- flavonol quercetine0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter, total phenolic contents and the flavonol quercetin were not significantly affected by UV-B and drought stress, neither solely nor in combination.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Anthocyanins accumulated only under drought stress.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- drought stresse0
- Outcome
- anthocyaninse0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“anthocyanins and luteolin accumulated only in response to drought stress.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Luteolin accumulated only under drought stress.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- drought stresse0
- Outcome
- luteoline0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“anthocyanins and luteolin accumulated only in response to drought stress.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
Proline increased with increased UV-B and water deficit.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- increased UV-B and water deficite0
- Outcome
- prolinee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the precursor amino acid proline as well as the activity of PAL increased under conditions of increased UV-B and water deficit.”
t0“lettuce (Lactuca sativa L.)”
Claim · model-written summary
PAL activity increased with increased UV-B and water deficit.
- Taxon
- lettuce (Lactuca sativa L.)Lactuca sativat0
- Treatment
- increased UV-B and water deficite0
- Gene
- PALe0
- Outcome
- activity of PALe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the precursor amino acid proline as well as the activity of PAL increased under conditions of increased UV-B and water deficit.”
t0“lettuce (Lactuca sativa L.)”
The same questions in other papers
drought · quality: phytochemicals · Lactuca sativa (garden lettuce)Results differ
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
drought · growth · Lactuca sativa (garden lettuce)Results differ
12 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- positive
- positive
15 papers more in this group
See all 19 papers →uv · quality: phytochemicals · Lactuca sativa (garden lettuce)Results differ
3 papers in the same direction as this paper · 24 in the opposite direction
- positive
- positive
- positive
24 papers more in this group
See all 28 papers →uv · growth · Lactuca sativa (garden lettuce)Results differ
19 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
- positive
31 papers more in this group
See all 35 papers →drought · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →uv · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
12 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.