Abstract
Drought stress significantly hampers crop growth and yield by negatively impacting various biochemical and physiological plant processes. This study aimed to assess drought tolerance in traditional rice varieties using Poly Ethylene Glycol 6000 (PEG 6000) and focused on the effectiveness of melatonin applied through both seed treatment and foliar spray in mitigating the effects of drought stress. The optimal drought screening conditions were determined at a PEG concentration of -4 bars. As the PEG concentration increased, key factors such as germination percentage, vigor index, root length, and shoot length decreased. This indicates that PEG can be a useful tool for early selection of drought tolerant rice varieties. Melatonin (N-acetyl-5-methoxytryptamine), known for alleviating abiotic stress, showed positive effects on seed germination at 200 ppm concentration. The study observed that stomatal closure is a natural response to drought stress, but melatonin application induced partial stomatal opening. Notably, a foliar spray of 100 ppm melatonin demonstrated better recovery from drought stress compared to the 200 ppm concentration. In conclusion, the research suggests that seed treatment with 200 ppm melatonin and foliar spraying with 100 ppm melatonin are the most effective approaches for reducing the adverse effects of drought stress in rice plants.
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Claims 9
Claim · model-written summary
The optimal PEG drought screening condition for rice was -4 bars.
- Taxon
- rice
Oryza sativae1 - Outcome
- optimal drought screening conditionse0
- Value
- -4 barse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e0“The optimal drought screening conditions were determined at a PEG concentration of -4 bars”
Claim · model-written summary
Germination percentage and vigor index of rice decreased as PEG concentration increased.
- Taxon
- riceOryza sativae1
- Treatment
- PEG concentratione2
- Outcome
- germination percentage, vigor indexe2
- Direction
- decreasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e2“As the PEG concentration increased, key factors such as germination percentage, vigor index, root length, and shoot length decreased”
Claim · model-written summary
Root length and shoot length of rice decreased as PEG concentration increased.
- Taxon
- riceOryza sativae1
- Treatment
- PEG concentratione2
- Outcome
- root length, and shoot lengthe2
- Direction
- decreasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e2“As the PEG concentration increased, key factors such as germination percentage, vigor index, root length, and shoot length decreased”
Claim · model-written summary
Melatonin showed positive effects on rice seed germination at 200 ppm.
- Taxon
- riceOryza sativae1
- Treatment
- Melatonine3
- Outcome
- seed germinatione3
- Direction
- increaseinferrede3
- Qualifier
- 200 ppm concentratione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e3“Melatonin (N-acetyl-5-methoxytryptamine), known for alleviating abiotic stress, showed positive effects on seed germination at 200 ppm concentration”
Claim · model-written summary
Stomatal closure is a natural response of rice to drought stress.
- Taxon
- riceOryza sativae1
- Outcome
- stomatal closuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e0“stomatal closure is a natural response to drought stress”
Claim · model-written summary
Melatonin application induced partial stomatal opening in rice under drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- melatonin applicatione4
- Outcome
- stomatal openinge4
- Direction
- increaseinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e4“but melatonin application induced partial stomatal opening”
Claim · model-written summary
A foliar spray of 100 ppm melatonin gave better recovery of rice from drought stress than the 200 ppm concentration.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spray of 100 ppm melatonine5
- Outcome
- recovery from drought stresse5
- Direction
- bettere5
- Comparator
- the 200 ppm concentratione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“assess drought tolerance in traditional rice varieties”
e5“a foliar spray of 100 ppm melatonin demonstrated better recovery from drought stress compared to the 200 ppm concentration”
Claim · model-written summary
Seed treatment with 200 ppm melatonin and foliar spraying with 100 ppm melatonin are the most effective approaches for reducing adverse effects of drought stress in rice.
- Taxon
- rice plantsOryza sativae6
- Outcome
- reducing the adverse effects of drought stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“seed treatment with 200 ppm melatonin and foliar spraying with 100 ppm melatonin are the most effective approaches for reducing the adverse effects of drought stress in rice plants”
Claim · model-written summary
PEG can be a useful tool for early selection of drought tolerant rice varieties.
- Taxon
- rice varietiesOryza sativae7
- Outcome
- early selection of drought tolerant rice varietiese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“PEG can be a useful tool for early selection of drought tolerant rice varieties”
The same questions in other papers
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See all 28 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.