Exogenous arachidonic acid and methyl jasmonate induced-changes on the free fatty acid profile of rice (Oryza sativa L.) grown on saline soil

Cha Thye San, . and Puteri Afiqah Abdul Wahab, . and Muhamad Fairus Noor Hassim, . and Azrul Hanis Zainuddin, . and Ma Nyuk Ling, . and Aziz Ahmad, . Exogenous arachidonic acid and methyl jasmonate induced-changes on the free fatty acid profile of rice (Oryza sativa L.) grown on saline soil. pp. 18-23. ISSN 1985-0484

Rice growth and productivity are restricted by the uncontrollable abiotic factors such as salinity and drought at various developmental stages. Plants respond to abiotic stress by modifying fatty acid profile and turnover to sequester carbon energies and phospholipid. Therefore acyl lipid metabolism is crucial throughout the plant life cycle and in response to abiotic or biotic stresses. Nonetheless a very limited report on the effects of exogenous fatty acids on lipid profile in rice grown under salinity conditions. Therefore the objective of the study was to determine the effects of foliar application of arachidonic acid (AA) and methyl jasmonate (MeJA) on the fatty acid profile of rice planted on saline soil. AA and MeJA were separately applied on foliar at with or without 50 M two weeks prior to panicle initiation. The leaves and panicle were analysed for free fatty acid profile using gas chromatography massspectrophotometry. Results showed that the levels for at least 25 fatty acids were altered by the exogenous fatty acid treatments in both leaves and panicle. Alpha-linolenic acid was significantly increased in panicle by both AA and MeJA treatments. This finding suggested that -linolenic acid may play a major role in regulating the panicle development during the salinity stress. In addition the AA and MeJA treatments reduced the formation of cytosolic free fatty acids in both leaves and panicle of rice plants under saline stress.

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Abstract

Rice growth and productivity are restricted by the uncontrollable abiotic factors such as salinity and drought at various developmental stages. Plants respond to abiotic stress by modifying fatty acid profile and turnover to sequester carbon energies and phospholipid. Therefore acyl lipid metabolism is crucial throughout the plant life cycle and in response to abiotic or biotic stresses. Nonetheless a very limited report on the effects of exogenous fatty acids on lipid profile in rice grown under salinity conditions. Therefore the objective of the study was to determine the effects of foliar application of arachidonic acid (AA) and methyl jasmonate (MeJA) on the fatty acid profile of rice planted on saline soil. AA and MeJA were separately applied on foliar at with or without 50 M two weeks prior to panicle initiation. The leaves and panicle were analysed for free fatty acid profile using gas chromatography massspectrophotometry. Results showed that the levels for at least 25 fatty acids were altered by the exogenous fatty acid treatments in both leaves and panicle. Alpha-linolenic acid was significantly increased in panicle by both AA and MeJA treatments. This finding suggested that -linolenic acid may play a major role in regulating the panicle development during the salinity stress. In addition the AA and MeJA treatments reduced the formation of cytosolic free fatty acids in both leaves and panicle of rice plants under saline stress.

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Item Type:	Article
AGROVOC Term:	Rice
AGROVOC Term:	Oryza sativa
AGROVOC Term:	Plant physiology
AGROVOC Term:	Gas chromatography
AGROVOC Term:	Arachidonic acid
AGROVOC Term:	Methyl jasmonate
AGROVOC Term:	Meja (methyl jasmonate)
AGROVOC Term:	Free fatty acids
AGROVOC Term:	Linolenic acid
AGROVOC Term:	Salt stress
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8195

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