@article {2158, title = {Effect of Plant Stage and Solvent Extraction on Catechin Contents in Borrasus flabellifer L. Male Flower}, journal = {Pharmacognosy Journal}, volume = {15}, year = {2023}, month = {December 2023}, pages = {1036-1041}, type = {Original Article}, chapter = {1036}, abstract = {

Borrasus flabellifer L. is a plant in the Arecaceae (Palmae) family with numerous bioactivities such as diuretic promotion, antioxidant, and antimicrobial effects. In this study, we are interested in the phytochemical compounds present in B. flabellifer L. male flowers. We investigated the effects of plant stage and solvent used for extraction. Initially, both the young and mature male flowers of this plant were extracted using water or ethanol. Several standard compounds, including gallic acid, catechin, caffeic acid, and quercetin, were utilized to screen the phytochemicals in these plant flowers. After analyzing the samples using High-Performance Liquid Chromatography (HPLC) method, only catechin was detected in all extracts, while the others were not detected (did not match the peak spectrum pattern compared with standard). Using a detection wavelength and curve parameters with an R2 value of 0.9999, catechin detection via HPLC was performed at 280 nm within the range of 13.12 to 210.00 {\textmu}g/mL detection. Regarding the stage of the male flower, the young ones extracted with water provided the highest catechin content at 6.65 {\textmu}g/mg extract, while the others fell within the range of 4.02 to 4.44 {\textmu}g/mg extract. Therefore, it has been confirmed that catechin can be found in B. flabellifer L., and water should be used as the solvent for extraction for further applications of this plant.

}, keywords = {Borrasus flabellifer L., Catechin, HPLC, Male flower, Mature, Young}, doi = {10.5530/pj.2023.15.190}, author = {Chayut Fongsuk and Patnaree Wongmanit and Kanoktip Pansuksan} } @article {1117, title = {Phytochemical Compounds in Arundo donax L. Rhizome and Antimicrobial Activities}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {March 2020}, pages = {287-292}, type = {Original Article}, chapter = {287}, abstract = {

Introduction: The aerial part of Arundo donax L., giant reed, is a well-known fuel source used in many countries. Methods: Phytochemical compounds in A. donax L. rhizome, sequentially extracted with hexane (HEX), dichloromethane (DCM), ethyl acetate (EA), and methanol (MeOH), were identified using gas chromatography-mass spectrometry. Antimicrobial activities of the rhizome extracts were evaluated using disc diffusion assay against yeast (Candida albicans), and bacteria Gram-positive (Staphylococcus aureus ATCC 25923, Bacillus cereus ATCC11778, and Bacillus subtilis ATCC6633) and Gram-negative (Escherichia coli ATCC25922). Results: The detected phytochemicals were screened against WILEY07 library; 84 compounds matched with a similarity >= 90\%. All the characterized compounds were grouped based on their functional group. The major phytochemicals in the HEX, DCM, and EA extracts belonged to sterol groups, while lipids, fatty acids, and related conjugates were the main components of the methanolic extract. The other characterized compounds were hydrocarbons, phenolics, terpenoids, xanthones, and xanthene. Growth of B. subtilis was inhibited by the HEX, DCM, EA, and MeOH extracts, whereas B. cereus growth was inhibited only by the DCM and EA extracts. However, growth of E. coli and C. albicans could be not inhibited by A. donax L. rhizome extracts. Analysis of the compounds as well as their antibacterial activities via hierarchical clustering showed that hexadecanoic acid is the major compound influencing B. subtilis growth, while, B. cereus growth was affected by xanthone. Conclusions: Rhizomes of A. donax L. is one potential source of antimicrobial agents and further applied in medicinal uses.

}, keywords = {Bacteria, GC-MS, Giant reed, HCA}, doi = {10.5530/pj.2020.12.45}, author = {Kanoktip Pansuksan and Sophida Sukprasert and Netiya Karaket} }