首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Morphological and Physiological Changes on Rhizopus stolonifer by Effect of Chitosan,Oligochitosan or Essential Oils
Authors:Ivonne C Alfaro‐Gutiérrez  María G Guerra‐Sánchez  Ana N Hernández‐Lauzardo  Miguel G Velázquez‐del Valle
Institution:1. CEPROBI, Instituto Politécnico Nacional, , C.P 62731 Yautepec, Morelos, México;2. ENCB, Instituto Politécnico Nacional, , C.P. 11340 México D. F, México
Abstract:Effects of chitosan, oligochitosan and the essential oils of clove and cinnamon were evaluated on hyphal morphology, cell wall thickness, minimum medium pH changes and respiration of Rhizopus stolonifer. Changes in hyphal morphology were observed due to chitosan or oligochitosan treatment in this fungus. Mycelial branching, abnormal shapes and swelling were showed on hyphae of R. stolonifer treated with chitosan, whereas the development of hyphae was markedly inhibited by the effect of oligochitosan. Clove and cinnamon oils caused few morphological changes in the hyphae of R. stolonifer. Cell wall thickness was increased approximately 2‐ to 3‐fold by effect of chitosan, oligochitosan and the essential oil of clove. R. stolonifer grown in minimum medium generated a decrease in the medium's pH. However, the addition of chitosan or oligochitosan caused increases in pH of medium culture. The highest pH value (5.4) was observed in the presence of chitosan. The respiration of R. stolonifer was stimulated at low concentrations of chitosan, oligochitosan or essential oils. Significant changes in morphology and physiology of this fungus were demonstrated by the effect of all evaluated compounds. The most important changes were induced on cells of R. stolonifer treated with chitosan and oligochitosan.
Keywords:antifungal compounds  fungal morphology  fungal physiology     Rhizopus stolonifer   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号