Composition and Antimicrobial Activity of Different Plant Parts of Parthenium hysterophorus L.

K. Niranjan, R. Kapilan, P. N. Yapa
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Abstract

This study was aimed to determine the lignocellulosic biomass in different parts of Parthenium hysterophorus and evaluate its antimicrobial activity against selected microbial plant pathogens. Compositional analyses were conducted on live whole plants and their leaves, stems, flowers, and roots. The lignocellulosic biomass components were estimated gravimetrically as a percentage of dry weight, using the standard equation, while reducing sugar was quantified using a glucose standard curve. Significant differences (p < 0.05) in cellulose content were observed among different plant parts, with the highest dry weight percentage in the whole mature plant (48±0.33), followed by the stem (45±0.21), whole young plant (41±0.10), root (21±0.00), leaf (28±0.01), and inflorescence (21±0.14). Additionally, reducing sugar content in mg/mL was significantly higher in the stem (1.94±0.01) and root (1.17±0.00), followed by the mature whole plant (0.95±0.20), leaf-stem mixture (0.93±0.11), inflorescence (0.67±0.02), young whole plant (0.23±0.19), and leaf (0.17±0.01). The stem and root extracts from mature plants inhibited soil-borne plant pathogenic bacteria Pseudomonas sp. and Ralstonia sp. respectively. The leaf and inflorescence extracts of P. hysterophorus showed inhibitory effects only against Pseudomonas sp., not Ralstonia sp. Furthermore, the mature Parthenium plant extract inhibited all tested soil-borne fungi, with significantly higher inhibition percentages observed for Scelerotium sp. (81.93%) and Colletotrichum sp. (45.45%) compared to Fusarium sp. and Pythium sp. Significantly higher cellulose and lignin contents in the whole mature P. hysterophorus plant, along with its antimicrobial activity against major soil-borne plant pathogenic microbes was prominent than the individual plant parts and the young immature plant.
Parthenium hysterophorus L.不同植物部分的成分和抗菌活性
本研究旨在确定大戟不同部位的木质纤维素生物量,并评估其对特定微生物植物病原体的抗菌活性。对活的整株植物及其叶、茎、花和根进行了成分分析。木质纤维素生物质成分以干重的百分比用标准方程进行重力估算,还原糖则用葡萄糖标准曲线进行量化。不同植株部位的纤维素含量存在显著差异(p < 0.05),成熟植株的干重百分比最高(48±0.33),其次是茎(45±0.21)、幼苗(41±0.10)、根(21±0.00)、叶(28±0.01)和花序(21±0.14)。此外,茎(1.94±0.01)和根(1.17±0.00)的还原糖含量(毫克/毫升)明显较高,其次是成熟全株(0.95±0.20)、叶-茎混合物(0.93±0.11)、花序(0.67±0.02)、幼嫩全株(0.23±0.19)和叶(0.17±0.01)。成熟植株的茎提取物和根提取物分别对土生植物病原菌假单胞菌属(Pseudomonas sp.)和雷氏菌属(Ralstonia sp.)有抑制作用。叶和花序提取物只对假单胞菌有抑制作用,而对 Ralstonia sp、此外,成熟的 Parthenium 植物提取物对所有测试的土传真菌都有抑制作用,对 Scelerotium sp.(81.93%)和 Colletotrichum sp.(45.45%)的抑制率明显高于对 Fusarium sp.和 Pythium sp.的抑制率。整株成熟的 P. hysterophorus 植物的纤维素和木质素含量明显高于单个植物部分和未成熟幼株,其对主要土传植物病原微生物的抗菌活性也很突出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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