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Study of Bioactivity of Chitooligosaccharide and Its Dodecylbenzenesulfonic Acid Salt

Author: ZhangHongXing
Tutor: YuanHuiZhu
School: Beijing University of Chemical Technology
Course: Fermentation Engineering
Keywords: chitooligosaccharide inhibiton cucumber gray mould induce resistance defense enzyme
CLC: S436.421
Type: Master's thesis
Year: 2006
Downloads: 37
Quote: 0
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Abstract


In this paper, a derivative of chitooligosaccharide(COS) was synthesized by the reaction of COS and dodecylbenzenesulfonic acid(LAS). The product (L-C) was characterized by FT-IR, ~1H-NMR and UV, and was proved as a salt. The inhibition activity of COS and L-C on some phytopathogens fungi was studied by means of the mycelium growth rate in vitro and sporangia germination method. The control effect of COS and L-C against cucumber gray mould by cotyledon screen sizing method and the test in potted plant. Activities of the defense enzymes involved in POD, PPO and PAL induced by COS and L-C were measured by two different treatments of different concentrations and different induced time. The results indicate, COS and L-C have the effect of inhibition on some Phytopathogen fungi. And the effect will be better following the increasing of the treatment concentration. The curative effect of COS against cucumber gray mould is good only when the

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Horticultural Crops Pest and Disease Control > Vegetable pests > Melons, pests and diseases > Cucumber pests and diseases
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