Antioxidants and antibacterial properties of extracts from leaves and stem of pink flower Impatiens walleriana

Tan, Suat Hian and Sin, Phin Yin and Mohd Hairul, Ab. Rahim and Ros Azlinawati, Ramli and Putri Shareen, Rosman (2024) Antioxidants and antibacterial properties of extracts from leaves and stem of pink flower Impatiens walleriana. In: AIP Conference Proceedings. AIP Conference Proceedings; 4th Symposium on Industrial Science and Technology, SISTEC 2022 , 23 - 24 November 2022 , Pahang. pp. 1-8., 3023 (020002). ISSN 0094-243X ISBN 978-073544800-1

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Abstract

Impatiens walleriana is a vibrant and flowering plant sources cherished for its antioxidants and antimicrobial properties. This research aimed to evaluate the impact of three different drying treatments (microwave drying, oven drying, and air drying) on the antioxidant compounds of leaves and stems of pink flower I. walleriana. Besides, antibacterial efficacy of leaves extract against Gram-positive and Gram-negative bacteria were also evaluated. Microwave-dried leaves extract exhibited high phenolic (6.358±0.18 mg GAE/100g), flavonoid (0.528±0.005 mg QAE/100g) and caffeoylquinic acid contents (0.988±0.012 mg CQCA/100g), followed by oven-dried and air dried. Stem extracts of I. walleriana showed relatively less phenolic compound as compared to leaves extract probably due to the plant’s defense strategy against environmental stress. Besides, the leaves extract was chosen for antibacterial activity using Kirby-Bauer disc-diffusion method. The results revealed that I. walleriana able to suppress growth of both Gram-positive and Gram-negative bacteria. Nevertheless, I. walleriana had stronger inhibitory effect against Escherichia coli while least inhibitory effect against Pseudomonas aeruginosa, with inhibition zone of 6.6 mm and 1 mm, respectively. The antibacterial effect of I. walleriana also found superior to streptomycin especially against Gram-negative bacteria. The antibacterial effect of I. walleriana against E. coli was found to be two times stronger than the synthetic antibiotics. Hence, this indicates that I. walleriana had a good potential as an alternative source of antioxidant and antimicrobial and replacing the synthetic additives in current market.

Item Type:	Conference or Workshop Item (Lecture)
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Impatiens walleriana; Antioxidant; Synthetic additives;
Subjects:	Q Science > Q Science (General) Q Science > QH Natural history T Technology > TP Chemical technology
Faculty/Division:	Faculty of Industrial Sciences And Technology Institute of Postgraduate Studies
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	02 Jul 2024 01:30
Last Modified:	02 Jul 2024 01:30
URI:	http://umpir.ump.edu.my/id/eprint/41767
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