Characterization of rice straw lignin phenolics and evaluation of their role in pollen tube growth in Cucurbita pepo L

• Published in: Natural product research Vol. 38; no. 11; pp. 1844 - 1849
• Main Authors: Mankoo, Ramandeep Kaur, Kaur, Jasleen, Chahal, Gagandeep Kaur
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 02-06-2024; Taylor & Francis Ltd
• Subjects: Acetates; Acetic acid; Acids; Acrylamide; Amides; Amines; Caffeic acid; Caffeic Acids - chemistry; Chemical synthesis; Coumaric Acids - chemistry; Cucurbita - chemistry; Cucurbita pepo; Ethyl acetate; Ferulic acid; Genotypes; Germination; Germination - drug effects; Hydroxybenzoates - chemistry; Interspecific hybridization; Irradiation; Lignin; Lignin - chemistry; Magnetic Resonance Spectroscopy; Microwave radiation; NMR; Nuclear magnetic resonance; Oryza - chemistry; Oryza - growth & development; p-Coumaric acid; Phenolic acids; Phenols; Phenols - analysis; Phenols - chemistry; Pollen; pollen germination; pollen tube; Pollen Tube - drug effects; Pollen Tube - growth & development; Pollen tubes; Rice straw; Spectroscopy, Fourier Transform Infrared; Straw; pollen germination; amides; lignin; pollen tube; Rice straw; phenolic acids
• ISSN: 1478-6419; 1478-6427
• DOI: 10.1080/14786419.2023.2225126

Rice straw lignin was extracted via alkaline hydrolysis and structurally characterized using FT-IR and
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H NMR spectra. Ethyl acetate extract of acid solubilized lignin was found to contain p-coumaric acid, ferulic acid and caffeic acid as major phenolic acids which were isolated and characterized using spectral data. Amides of isolated phenolic acids were synthesized by their reaction with propyl and butyl amines using microwave irradiation and analysed using spectral studies. Phenolic acids and amides were evaluated for their effect on pollen germination and tube growth in pumpkin. Pollen tube length was significantly increased with N-butyl-3-(3, 4-dihydroxyphenyl) acrylamide and N-butyl-3-(4-hydroxyphenyl) acrylamide at 5 ppm concentration than the control. These results could be utilised in increasing pollen tube length of Cucurbita pepo while making interspecific cross between C. moschata and C. pepo in order to transfer hull-less character of C. pepo to virus resistant C. moschata genotypes.