title: Probing occurrence of phenylpropanoids in Morinda citrifolia in relation to foliar diseases.
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.
authors.affiliation: a Central Horticultural Experiment Station (ICAR) , Aiginia, Bhubaneswar 751019 , India.
authors.forename: Sudhamoy
authors.initials: S
authors.lastname: Mandal
authors.forename: Chiranjibi
authors.initials: C
authors.lastname: Rath
authors.forename: Chandan Kumar
authors.initials: CK
authors.lastname: Gupta
authors.forename: Vishal
authors.initials: V
authors.lastname: Nath
authors.forename: Hari Shankar
authors.initials: HS
authors.lastname: Singh
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry; D002473:Cell Wall / Q000737:chemistry*; D003373:Coumaric Acids / Q000737:chemistry; D032066:Morinda / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D010935:Plant Diseases; D018515:Plant Leaves / Q000737:chemistry*; D011422:Propionates; D014641:Vanillic Acid / Q000737:chemistry
chemical_list: D001547:Benzaldehydes; D003373:Coumaric Acids; D010636:Phenols; D011422:Propionates; C004999:ferulic acid; D014641:Vanillic Acid; C495469:p-coumaric acid; C011483:4-hydroxybenzaldehyde
keywords: 4-coumaric acid; 4-hydroxybenzoic acid; Morinda citrifolia; cell wall-bound phenolics; ferulic acid; phenylpropanoids; plant disease