Effects of Exogenous Arachidonic Acid on Morphological Traits and Fatty Acid Profile of Rice (Oryza sativa L.) Grown on Saline Soil
DOI:
https://doi.org/10.46754/umtjur.v1i3.80Keywords:
arachidonic acid, panicle, spikelet, polyunsaturated fatty acid, Oryza sativaAbstract
Salinity is one of the major constraints in the rice production worldwide. Rice plants have moderate tolerance towards salinity. Salinity changes cell membrane permeability and fatty acid compositions by releasing the free fatty acids. Nonetheless, the effect of exogenous fatty acid such as arachidonic acid (AA) on rice grown on saline soil is yet unknown. The objective of the current study is to determine the effect of AA on the morphological traits and free fatty acids of rice plant grown under saline conditions. Rice plants grown on saline soil (EC=12 ds/m) were treated with 50 mM AA on day 45 after transplant. Leaves and panicles were sampled after two weeks of treatment and analysed for fatty acid profile using GC-MS. The morphological traits were observed at the maturity stage. Results showed that AA treatment improved the grain fill-in of the saline stress rice and reduced the accumulation of free fatty acids in the cell. The AA treatment also increased the linoleic acid (18:2), linolenic acid (18:3) in panicles and, dihomo-y-linolenic acid (20:3) and nervonic acid (24:1) in leaves. The finding suggests that exogenous AA regulates salinity stress in rice by reducing the accumulation of free fatty acids.
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