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Assessment of the effect of chitosan of different molecular weights in controllingRhizopus rotsin tomato fruits

Authors :
A. N. Hernández-Lauzardo
Annia Hernández-Rodríguez
Miguel G. Velázquez-del Valle
Josam Vega-Pérez
María Guadalupe Guerra-Sánchez
Mayra Heydrich-Pérez
Source :
Archives Of Phytopathology And Plant Protection. 45:33-41
Publication Year :
2012
Publisher :
Informa UK Limited, 2012.

Abstract

The effect of chitosan was evaluated in three isolates of Rhizopus stolonifer from infected tomatoes that were harvested in different regions of the state of Morelos, Mexico. Changes in the membrane integrity of spores, modifications in pH media and the proteins released were analysed in each isolate against three different molecular weights of chitosan at three fixed concentrations. There was an observed decline in the integrity of spores in the presence of chitosan at all the concentrations evaluated. The protein released was different depending on the isolate, kind of chitosan and used concentration. There was a significant difference in the pH changes on the growth media for all the tested isolates. Chitosan of high molecular weight showed the best results to inhibit the infection caused by R. stolonifer on the tomato fruits. The severity of symptoms of soft rot was not related with the molecular weight of chitosan.

Details

ISSN :
14772906 and 03235408
Volume :
45
Database :
OpenAIRE
Journal :
Archives Of Phytopathology And Plant Protection
Accession number :
edsair.doi...........f9eaf558b89208b6d93c4fe9d982de60
Full Text :
https://doi.org/10.1080/03235400903345190