Probing occurrence of phenylpropanoids in Morinda citrifolia in relation to foliar diseases |
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Authors: | Sudhamoy Mandal Chiranjibi Rath Chandan Kumar Gupta Vishal Nath Hari Shankar Singh |
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Affiliation: | Central Horticultural Experiment Station (ICAR), Aiginia, Bhubaneswar751019, India |
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Abstract: | Accumulation of phenolic compounds in cell walls of different plant organs leading to increased lignification is an early defence response of plants against biotic stress. The aim of this work was to delineate occurrence of cell wall-bound (CWB) phenolic compounds in Morinda citrifolia leaves. Alkaline hydrolysis of the cell wall material of leaf tissues yielded 4-coumaric acid (4-CA) as the major bulk of the phenolic compounds in all Morinda germplasms. Next in line was 4-hydroxybenzoic acid. Other phenolics identified were vanillic acid, 4-hydroxybenzaldehyde, vanillin and ferulic acid. Concentrations of all the CWB phenolics were highest in the germplasm CHN-5, followed by the germplasm CHN-1. Incidentally, these two Morinda germplasms recorded lowest incidence of foliar diseases. Significantly higher amounts of 4-CA in combination with other phenolics may be the reasons for lowest incidence of foliar diseases in CHN-5 and CHN-1 germplasms of M. citrifolia. |
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Keywords: | cell wall-bound phenolics 4-coumaric acid ferulic acid 4-hydroxybenzoic acid Morinda citrifolia phenylpropanoids plant disease |
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