Journal of Food, Agriculture and Environment




Vol 6, Issue 1,2008
Online ISSN: 1459-0263
Print ISSN: 1459-0255


Antimicrobial activities of Ipomoea batatas (L.) leaf


Author(s):

Shahidul Islam

Recieved Date: 2007-09-11, Accepted Date: 2007-11-25

Abstract:

The antimicrobial activity of artificially grown sweetpotato [Ipomoea batatas (L.) Lam.] leaves was investigated against both Gram positive and Gram negative bacteria: Escherichia coli O157:H7, Bacillus cereus and Staphylococcus aureus. Three different cultivars, ‘Simon 1’, ‘Kyushu 117’ and ‘Elegant Summer’, were used. The sweetpotato leaves were grown under different temperatures (20, 25 and 30°C) and artificial shading (O, 40 and 80%) conditions. There were some cultivar differences however, the lyophilized leaf powder (100 mg) from all the cultivars in the Trypto Soya Broth cultivation medium (10 ml) strongly suppressed the growth of all the bacteria studied. However, the antibacterial extract of the leaves had no effect on the growth of 5 types of bifidobacteria useful for human health. The main components of the antibacterial extract were polysaccharides (30%) and protein (70%). In the polysaccharide fraction, the relative quantities of natural sugars were xylose > galactose > arabinose > glucose > rhamnose > mannose > fucose. These results suggest that the antibacterial component may be a pectin-like material. Thus, the practical use of sweetpotato leaves to prevent the growth of food-poisoning bacteria is very promising.

Keywords:

Sweetpotato leaf, bacteria, Gram positive, Gram negative, sugar, shading, temperature


Journal: Journal of Food, Agriculture and Environment
Year: 2008
Volume: 6
Issue: 1
Category: Food and Health
Pages: 14-17


View full PDF
Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.


Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :