Abstract
Drought causes a decrease in tobacco yield and quality as well as a reduction in net photosynthetic rate. Salicylic acid (SA) is involved in the regulation of many physiological processes and has been widely used to improve plant drought tolerance. The hydroponic experiment was carried out on flue-cured tobacco variety K326. SA solutions (0.3 mM) were sprayed on the leaves every day for three days, after which 15% PEG-6000 was used to simulate moderate drought. The results showed that drought stress reduced the photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr), while it enhanced the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), malondialdehyde (MDA), proline and protein content. Compared with PEG drought stress, SA improved the Pn, Gs and Tr by 45.74%, 26.82%, and 52.22% respectively. Besides, the activities of SOD, POD, CAT, protein and proline content increased by 44.27%, 50.18%, 25%, 34.69% and 24.88%, respectively, while the MDA content decreased by 23.89%. Furthermore, SA spraying increased the drought tolerance of tobacco by modulating the expression level of the genes associated with photosynthesis, carbon metabolism, and photosynthesis-antenna proteins. Hence, SA spraying reduced the inhibition of drought on photosynthesis and stimulated the antioxidant system, thus improving the drought resistance in tobacco.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. 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 6
Claim · model-written summary
Drought reduced photosynthetic rate, stomatal conductance and transpiration rate in tobacco.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacumt0 - Treatment
- drought stresse0
- Outcome
- photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress reduced the photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr)”
t0“Nicotiana tabacum L.”
Claim · model-written summary
Drought increased antioxidant enzyme activities and MDA, proline and protein content.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- drought stresse1
- Outcome
- activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it enhanced the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), malondialdehyde (MDA), proline and protein content”
e1“The results showed that drought stress”
t0“Nicotiana tabacum L.”
Claim · model-written summary
SA improved Pn by 45.74% compared with PEG drought stress.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- SAe0
- Outcome
- Pne0
- Direction
- improvede0
- Value
- 45.74%e0
- Comparator
- PEG drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with PEG drought stress, SA improved the Pn, Gs and Tr by 45.74%, 26.82%, and 52.22% respectively”
t0“Nicotiana tabacum L.”
Claim · model-written summary
SA improved Gs by 26.82% compared with PEG drought stress.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- SAe0
- Outcome
- Gse0
- Direction
- improvede0
- Value
- 26.82%e0
- Comparator
- PEG drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with PEG drought stress, SA improved the Pn, Gs and Tr by 45.74%, 26.82%, and 52.22% respectively”
t0“Nicotiana tabacum L.”
Claim · model-written summary
SA improved Tr by 52.22% compared with PEG drought stress.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- SAe0
- Outcome
- Tre0
- Direction
- improvede0
- Value
- 52.22%e0
- Comparator
- PEG drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with PEG drought stress, SA improved the Pn, Gs and Tr by 45.74%, 26.82%, and 52.22% respectively”
t0“Nicotiana tabacum L.”
Claim · model-written summary
SA increased SOD activity by 44.27%.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- SA sprayinge1
- Outcome
- SODe0
- Direction
- increasede0
- Value
- 44.27%e0
- Comparator
- PEG drought stresse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of SOD, POD, CAT, protein and proline content increased by 44.27%, 50.18%, 25%, 34.69% and 24.88%, respectively”
e1“SA spraying increased the drought tolerance of tobacco”
e2“Compared with PEG drought stress”
t0“Nicotiana tabacum L.”
The same questions in other papers
salicylic acid · physiology: antioxidant enzymes · Nicotiana tabacum (tobacco)Results differ
6 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
5 papers more in this group
See all 9 papers →salicylic acid · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 papers →drought · physiology: antioxidant enzymes · Nicotiana tabacum (tobacco)Results differ
5 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
4 papers more in this group
See all 8 papers →application · physiology: antioxidant enzymes · Nicotiana tabacum (tobacco)Positive and negative results
10 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
8 papers more in this group
See all 12 papers →drought · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
24 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
22 papers more in this group
See all 26 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.