Abstract
Background and Objective: Methyl jasmonate (MeJA) is involved in signal transduction pathway of plant development and responses to several environmental stress factors. This study was undertaken to explore the role of exogenous methyl jasmonate (MeJA) for mitigation of salt stress effect of six rice varieties. Materials and Methods: Two hybrid (BRRI dhan31 and BRRI dhan46) and four local (Gota, Kajalsail, Pokkali and Pengek) rice varieties were selected. Seedlings were grown hydroponically with normal conditions until 21 days and then subjected to 9 dS mG 1 NaCl stress followed by application of 10 or 20 M MeJA as foliar spray. Changes in biochemical components such as activity of antioxidant enzymes i.e., catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), chlorophyll content, Na + and K + contents of 28 days seedling stage were assayed. Results: The MeJA significantly increased plant growth, chlorophyll and K + content which were reduced by the application of NaCl while reduced Na + content in local varieties that was increased upon NaCl stress. Both NaCl stress as well as MeJA had varying trend in CAT activity while NaCl stress induced a significant increase in POD and APX activity but MeJA induced varying trend in different varieties. This study revealed that visual plant growth, chlorophyll, Na + and K + content support the positive effect of MeJA on mitigation of salt stress. Conclusion: The MeJA could be effectively sprayed on rice variety in saline belts as 10 M MeJA adequately proved its salinity alleviating role.
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Claims 7
Claim · model-written summary
MeJA significantly increased rice growth under salt stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MeJA significantly increased plant growth, chlorophyll and K + content which were reduced by the application of NaCl”
t0“Rice Varieties”
Claim · model-written summary
MeJA significantly increased chlorophyll and K+ content under salt stress.
- Taxon
- Rice
Oryza sativat0 - Treatment
- MeJAe0
- Outcome
- chlorophyll and K + contente0
- Direction
- increasede0
- Comparator
- NaCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MeJA significantly increased plant growth, chlorophyll and K + content which were reduced by the application of NaCl”
t0“Rice Varieties”
Claim · model-written summary
MeJA reduced Na+ content in local rice varieties under salt stress.
- Taxon
- RiceOryza sativat0
- Treatment
- MeJAe1
- Outcome
- Na + contente0
- Direction
- reducede0
- Comparator
- NaCl stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced Na + content in local varieties that was increased upon NaCl stress”
t0“Rice Varieties”
e1“The MeJA significantly increased plant growth, chlorophyll and K + content”
Claim · model-written summary
NaCl stress increased POD and APX activity significantly.
- Taxon
- RiceOryza sativat0
- Treatment
- NaCl stresse0
- Outcome
- POD and APX activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl stress induced a significant increase in POD and APX activity”
t0“Rice Varieties”
Claim · model-written summary
NaCl stress and MeJA produced varying CAT responses.
- Taxon
- RiceOryza sativat0
- Outcome
- varying trend in CAT activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both NaCl stress as well as MeJA had varying trend in CAT activity”
t0“Rice Varieties”
Claim · model-written summary
MeJA induced varied POD and APX responses among rice varieties.
- Taxon
- RiceOryza sativat0
- Outcome
- varying trende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MeJA induced varying trend in different varieties”
t0“Rice Varieties”
Claim · model-written summary
The authors recommend 10 M MeJA spray for rice in saline belts.
- Taxon
- riceOryza sativae0
- Outcome
- 10 M MeJAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MeJA could be effectively sprayed on rice variety in saline belts as 10 M MeJA adequately proved its salinity alleviating role”
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