Abstract
Exogenous application of methyl jasmonate (MeJA) improves rice drought tolerance, but its effects on rice yield and quality under drought stress during the reproductive phase remain unclear. A pot experiment was conducted to measure rice yield, grain quality, and starch physicochemical properties under three treatments: continuous flooding irrigation throughout the whole growth season (CF), ten days of −40 kPa drought stress at the heading stage (DS), and foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM). An inbred japonica rice variety, Huaidao 5, was the experimental material, and each treatment had 11 replicates for sampling. The results indicated that DS significantly reduced rice yield and quality compared to CF. With increases in superoxide dismutase (+22.2%), peroxidase activities (+10.5%), catalase (+5.0%), and proline content (+5.7%), DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS. Regarding grain quality, DM significantly decreased the chalkiness degree (−12.3%) and protein content (−3.9%) but increased the amylose content (+17.2%) and taste value (+7.3%) relative to DS. In addition, DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS. In conclusion, exogenous application of 100 μmol L−1 MeJA enhanced the antioxidant capacity of rice leaves, and thus improved starch physicochemical properties to increase grain yield and quality under terminal drought stress.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 18
Claim · model-written summary
Terminal drought reduced rice yield and quality compared with continuous flooding.
- Taxon
- rice
Oryza sativae1 - Treatment
- ten days of −40 kPa drought stress at the heading stagee0
- Outcome
- rice yield and qualitye1
- Direction
- reducede1
- Comparator
- continuous flooding irrigation throughout the whole growth seasone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ten days of −40 kPa drought stress at the heading stage (DS)”
e2“continuous flooding irrigation throughout the whole growth season (CF)”
e1“DS significantly reduced rice yield and quality compared to CF”
Claim · model-written summary
MeJA increased superoxide dismutase activity by 22.2% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- superoxide dismutasee4
- Direction
- increasese4
- Value
- +22.2%e4
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e4“With increases in superoxide dismutase (+22.2%), peroxidase activities (+10.5%), catalase (+5.0%), and proline content (+5.7%)”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA increased peroxidase activity by 10.5% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- peroxidase activitiese4
- Direction
- increasese4
- Value
- +10.5%e4
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e4“With increases in superoxide dismutase (+22.2%), peroxidase activities (+10.5%), catalase (+5.0%), and proline content (+5.7%)”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA increased catalase activity by 5.0% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- catalasee4
- Direction
- increasese4
- Value
- +5.0%e4
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e4“With increases in superoxide dismutase (+22.2%), peroxidase activities (+10.5%), catalase (+5.0%), and proline content (+5.7%)”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA increased proline content by 5.7% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- proline contente4
- Direction
- increasese4
- Value
- +5.7%e4
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e4“With increases in superoxide dismutase (+22.2%), peroxidase activities (+10.5%), catalase (+5.0%), and proline content (+5.7%)”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA significantly increased 1000-grain weight by 8.6% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- 1000-grain weighte5
- Direction
- increasede5
- Value
- +8.6%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA significantly increased filled grain percentage by 3.6% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- filled grain percentagee5
- Direction
- increasede5
- Value
- +3.6%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA significantly increased yield by 11.1% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- yielde5
- Direction
- increasede5
- Value
- +11.1%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e5“DM significantly increased 1000-grain weight (+8.6%), filled grain percentage (+3.6%), and yield (+11.1%) compared with DS”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
Claim · model-written summary
MeJA significantly decreased chalkiness degree by 12.3% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- chalkiness degreee4
- Direction
- decreasede4
- Value
- −12.3%e4
- Comparator
- DSe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e4“DM significantly decreased the chalkiness degree (−12.3%) and protein content (−3.9%) but increased the amylose content (+17.2%) and taste value (+7.3%) relative to DS”
Claim · model-written summary
MeJA significantly decreased grain protein content by 3.9% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- protein contente4
- Direction
- decreasede4
- Value
- −3.9%e4
- Comparator
- DSe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e4“DM significantly decreased the chalkiness degree (−12.3%) and protein content (−3.9%) but increased the amylose content (+17.2%) and taste value (+7.3%) relative to DS”
Claim · model-written summary
MeJA significantly increased amylose content by 17.2% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- amylose contente4
- Direction
- increasede4
- Value
- +17.2%e4
- Comparator
- DSe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e4“DM significantly decreased the chalkiness degree (−12.3%) and protein content (−3.9%) but increased the amylose content (+17.2%) and taste value (+7.3%) relative to DS”
Claim · model-written summary
MeJA significantly increased taste value by 7.3% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- taste valuee4
- Direction
- increasede4
- Value
- +7.3%e4
- Comparator
- DSe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e4“DM significantly decreased the chalkiness degree (−12.3%) and protein content (−3.9%) but increased the amylose content (+17.2%) and taste value (+7.3%) relative to DS”
Claim · model-written summary
MeJA improved breakdown viscosity by 17.8% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- breakdown viscositye5
- Direction
- improvede5
- Value
- +17.8%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e5“DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS”
Claim · model-written summary
MeJA improved gelatinization enthalpy by 17.2% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- gelatinization enthalpye5
- Direction
- improvede5
- Value
- +17.2%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e5“DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS”
Claim · model-written summary
MeJA improved retrogradation enthalpy by 28.0% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- retrogradation enthalpye5
- Direction
- improvede5
- Value
- +28.0%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e5“DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS”
Claim · model-written summary
MeJA improved the 1045/1022 cm−1 starch ratio by 3.0% relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- 1045/1022 cm−1 ratioe5
- Direction
- improvede5
- Value
- +3.0%e5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e5“DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS”
Claim · model-written summary
MeJA improved starch granule morphology relative to drought stress.
- Taxon
- riceOryza sativae1
- Treatment
- foliar spraying 100 μmol L−1 MeJAe3
- Outcome
- starch granule morphologye5
- Direction
- improvede5
- Comparator
- DSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e3“foliar spraying 100 μmol L−1 MeJA on the first three days of the ten-day −40 kPa heading stage drought stress (DM)”
e5“DM improved breakdown viscosity (+17.8%), gelatinization enthalpy (+17.2%), retrogradation enthalpy (+28.0%), 1045/1022 cm−1 ratio (+3.0%), and starch granule morphology compared to DS”
Claim · model-written summary
MeJA enhanced leaf antioxidant capacity, which improved starch properties and so grain yield and quality under terminal drought.
- Taxon
- riceOryza sativae1
- Treatment
- exogenous application of 100 μmol L−1 MeJAe6
- Outcome
- grain yield and qualitye6
- Qualifier
- enhanced the antioxidant capacity of rice leavese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“DS significantly reduced rice yield and quality compared to CF”
e6“exogenous application of 100 μmol L−1 MeJA enhanced the antioxidant capacity of rice leaves, and thus improved starch physicochemical properties to increase grain yield and quality under terminal drought stress”
The same questions in other papers
(-)-methyl jasmonate · yield · Oryza sativa (rice)Results differ
12 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- negative
12 papers more in this group
See all 16 papers →(-)-methyl jasmonate · physiology: antioxidant enzymes · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
2 papers more in this group
See all 6 papers →(-)-methyl jasmonate · physiology: osmolytes · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
drought · quality: general · Oryza sativa (rice)Results differ
4 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →application · quality: general · Oryza sativa (rice)Positive and negative results
18 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
17 papers more in this group
See all 21 papers →application · quality: sugar starch · Oryza sativa (rice)Positive and negative results
20 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- no effect
20 papers more in this group
See all 24 papers →application · yield · Oryza sativa (rice)Positive and negative results
644 papers in the same direction as this paper · 37 in the opposite direction · 9 reporting no difference from an alternative
- negative
- no effect
- no effect
687 papers more in this group
See all 691 papers →application · physiology: osmolytes · Oryza sativa (rice)Results agree
17 papers in the same direction as this paper
- positive
- positive
- positive
14 papers more in this group
See all 18 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.