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- W2897788100 abstract "Phenylalanine ammonia lyase (PAL) is the first enzyme of phenylpropanoid pathway. In the present study, a full-length PAL transcript from Vanda coerulea Griff. ex Lindl. (Family: Orchidaceae) was isolated and characterized. It was found that complete PAL transcript of V. coerulea (VcPAL; Gene Bank no. MG745168) contained 2175 bp with the open reading frame (ORF) of 2112 bp, encoding 703 amino acid residues. The multiple sequence alignment showed that VcPAL protein had 81% identity with that of the orchid, Bromheadia finlaysoniana. Phylogenetic analysis also disclosed that VcPAL shared the same evolutionary relationship with PAL proteins of other orchid species and to be closely related to that of other angiosperm species as well. The three-dimensional structure of VcPAL was found to be homo-tetrameric in nature consisting of four identical subunits with a molecular mass of 75 kDa per subunit. In silico characterization revealed the deduced protein to be a stable protein, comprising three major functional domains as reported in PAL proteins of other species. The transcription profiling of VcPAL exhibited the highest expression level to be present in the in vitro - raised leaf and root samples as compared to that of the ex vitro plant. The differential expression of VcPAL transcript was observed to be up-regulated by different types of abiotic stresses like wounding, cold, UV-B, salinity, and down-regulated by dark treatment. The study also exhibited that the VcPAL enzyme activity was directly proportional to the gene expression after the tissues were subjected to salinity and wounding stresses wherein a 1.7- fold increase in the enzyme activity was recorded in the leaf tissues exposed to salinity stress. A positive correlation could be found between the enzyme activity and the accumulation of phenylpropanoids such as total phenolic and flavonoid contents with R2 = 0.85 and 0.842 respectively." @default.
- W2897788100 created "2018-10-26" @default.
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- W2897788100 date "2018-12-01" @default.
- W2897788100 modified "2023-10-04" @default.
- W2897788100 title "In silico characterization and transcriptional modulation of phenylalanine ammonia lyase (PAL) by abiotic stresses in the medicinal orchid Vanda coerulea Griff. ex Lindl." @default.
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- W2897788100 doi "https://doi.org/10.1016/j.phytochem.2018.09.012" @default.
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