The antibacterial activity of the lactoperoxidase system (LPS) on the growth of Xanthomonas campestris, the causal agent of bacterial black spot in mangoes, Botryodiplodia theobromae, the causal agent of stem-end rot disease in mangoes, and Colletotrichum gloeosporioides, the causal agent of anthracnose disease in mangoes, was determined during culture at 30°C and at several pH values (4.5, 5.5, and 6.5). When the results of using the LPS were compared with those from control cultures without the LPS reagents, the growth of the three microorganisms was totally inhibited in all of the conditions tested. Viability tests enumerating cultivable cells of X. campestris showed that the LPS had a bactericidal effect, whatever the pH value. This effect is faster at pH 5.5, corroborating the results reported in the literature (optimal pH for the LPS efficiency). Further, we proved that hydrogen peroxide alone had little inhibition effect on the growth of the microorganisms studied. This compound is essentially used to convert thiocyanate into hypothiocyanate during the lactoperoxidase reaction. The potential of the LPS for the postharvest treatment of the fruits for controlling microbial diseases was thus demonstrated. Nevertheless, further studies are needed on fresh fruits before envisaging any application.
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Research Article|
July 01 2005
Effect of the Lactoperoxidase System against Three Major Causal Agents of Disease in Mangoes
DOAN DUY LE NGUYEN;
DOAN DUY LE NGUYEN
1Cantho University, Faculty of Agriculture, Food Technology Department, Cantho, Vietnam
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MARIE-NOELLE DUCAMP;
MARIE-NOELLE DUCAMP
*
2Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Tropical Fruits Department (FLHOR), and Advanced Methods for Innovation in Science Department (AMIS), avenue Agropolis, TA 50/PS4, 340398 Montpellier cedex 5, France
* Author for correspondence. Tel: +33/4-67615557; Fax: +33/4-67614433; E-mail: ducamp@cirad.fr.
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MANUEL DORNIER;
MANUEL DORNIER
2Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Tropical Fruits Department (FLHOR), and Advanced Methods for Innovation in Science Department (AMIS), avenue Agropolis, TA 50/PS4, 340398 Montpellier cedex 5, France
3Ecole Nationale Supérieure des Industries Alimentaires (ENSIA), Tropical Food Department (SIARC), 1101 avenue Agropolis, CS 24501, 34093 Montpellier cedex 5, France
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DIDIER MONTET;
DIDIER MONTET
2Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Tropical Fruits Department (FLHOR), and Advanced Methods for Innovation in Science Department (AMIS), avenue Agropolis, TA 50/PS4, 340398 Montpellier cedex 5, France
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GÉRARD LOISEAU
GÉRARD LOISEAU
2Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Tropical Fruits Department (FLHOR), and Advanced Methods for Innovation in Science Department (AMIS), avenue Agropolis, TA 50/PS4, 340398 Montpellier cedex 5, France
3Ecole Nationale Supérieure des Industries Alimentaires (ENSIA), Tropical Food Department (SIARC), 1101 avenue Agropolis, CS 24501, 34093 Montpellier cedex 5, France
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J Food Prot (2005) 68 (7): 1497–1500.
Article history
Received:
September 14 2004
Accepted:
January 08 2005
Citation
DOAN DUY LE NGUYEN, MARIE-NOELLE DUCAMP, MANUEL DORNIER, DIDIER MONTET, GÉRARD LOISEAU; Effect of the Lactoperoxidase System against Three Major Causal Agents of Disease in Mangoes. J Food Prot 1 July 2005; 68 (7): 1497–1500. doi: https://doi.org/10.4315/0362-028X-68.7.1497
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