Antimicrobial screening of plant extracts on selected microorganisms

Leaf extracts from six different plants commonly found in the Philippines were studied for the presence of antimicrobial activities. These included the following: Chrysophyllum cainito Linn. (1753) (star apple), Syzygium cumini Skeels (1911) (jambul), Anona squamosa Linn. (1755) (sugar apple), Sesba...

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Main Authors: Dela Cruz, Kelvin Michael G., Yu, Shiny Cathlynne S.
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Language:English
Published: Animo Repository 2011
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Online Access:https://animorepository.dlsu.edu.ph/etd_bachelors/5286
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Institution: De La Salle University
Language: English
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spelling oai:animorepository.dlsu.edu.ph:etd_bachelors-58282022-03-02T02:02:28Z Antimicrobial screening of plant extracts on selected microorganisms Dela Cruz, Kelvin Michael G. Yu, Shiny Cathlynne S. Leaf extracts from six different plants commonly found in the Philippines were studied for the presence of antimicrobial activities. These included the following: Chrysophyllum cainito Linn. (1753) (star apple), Syzygium cumini Skeels (1911) (jambul), Anona squamosa Linn. (1755) (sugar apple), Sesbania grandiflora Linn. (1806) (white dragon tree), Allamanda cathartica Linn. (1771) (yellow bell), and Lantana camara (1771) (stink grass). All the plants were purchased from Manila Seedlings Garden at Quezon City, Metro Manila. The leaf extracts were obtained using the solvent extraction technique using methanol, dichloromethane, and hexane as extracting solvents. The antimicrobial activities of the leaf extracts were screened using the modified Kirbey-Bauer disc-agar diffusion method on the following test microorganisms: Gram-negative Escherichia coli ATCC 35218 and Pseudomonas aeruginosa ATCC 49189 and Gram-positive Staphylococcus aureus ATCC 25923. The results of the study showed that the leaf extracts of all plants inhibited at least one of the test microorganisms. Both the jambul and star apple leaf extracts exhibited inhibition of all three bacteria. While sugar apple inhibited both P. aeruginosa and S. aureus, white dragon tree, stink grass, and yellow bell only inhibited S. aureus. Moreover, among the organic solvents used, methanolic extracts exhibited antimicrobial activities for the most number of test microorganisms. The present study further demonstrated the presence of antimicrobial compounds in the different plants. 2011-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/etd_bachelors/5286 Bachelor's Theses English Animo Repository Plant extracts--Analysis Plant Biology Plant Sciences
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
language English
topic Plant extracts--Analysis
Plant Biology
Plant Sciences
spellingShingle Plant extracts--Analysis
Plant Biology
Plant Sciences
Dela Cruz, Kelvin Michael G.
Yu, Shiny Cathlynne S.
Antimicrobial screening of plant extracts on selected microorganisms
description Leaf extracts from six different plants commonly found in the Philippines were studied for the presence of antimicrobial activities. These included the following: Chrysophyllum cainito Linn. (1753) (star apple), Syzygium cumini Skeels (1911) (jambul), Anona squamosa Linn. (1755) (sugar apple), Sesbania grandiflora Linn. (1806) (white dragon tree), Allamanda cathartica Linn. (1771) (yellow bell), and Lantana camara (1771) (stink grass). All the plants were purchased from Manila Seedlings Garden at Quezon City, Metro Manila. The leaf extracts were obtained using the solvent extraction technique using methanol, dichloromethane, and hexane as extracting solvents. The antimicrobial activities of the leaf extracts were screened using the modified Kirbey-Bauer disc-agar diffusion method on the following test microorganisms: Gram-negative Escherichia coli ATCC 35218 and Pseudomonas aeruginosa ATCC 49189 and Gram-positive Staphylococcus aureus ATCC 25923. The results of the study showed that the leaf extracts of all plants inhibited at least one of the test microorganisms. Both the jambul and star apple leaf extracts exhibited inhibition of all three bacteria. While sugar apple inhibited both P. aeruginosa and S. aureus, white dragon tree, stink grass, and yellow bell only inhibited S. aureus. Moreover, among the organic solvents used, methanolic extracts exhibited antimicrobial activities for the most number of test microorganisms. The present study further demonstrated the presence of antimicrobial compounds in the different plants.
format text
author Dela Cruz, Kelvin Michael G.
Yu, Shiny Cathlynne S.
author_facet Dela Cruz, Kelvin Michael G.
Yu, Shiny Cathlynne S.
author_sort Dela Cruz, Kelvin Michael G.
title Antimicrobial screening of plant extracts on selected microorganisms
title_short Antimicrobial screening of plant extracts on selected microorganisms
title_full Antimicrobial screening of plant extracts on selected microorganisms
title_fullStr Antimicrobial screening of plant extracts on selected microorganisms
title_full_unstemmed Antimicrobial screening of plant extracts on selected microorganisms
title_sort antimicrobial screening of plant extracts on selected microorganisms
publisher Animo Repository
publishDate 2011
url https://animorepository.dlsu.edu.ph/etd_bachelors/5286
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