期刊
APPLIED BIOCHEMISTRY AND MICROBIOLOGY
卷 54, 期 1, 页码 71-75出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0003683818010118
关键词
low-molecular-weight chitosan; oligomeres; plant protection; Septoria leaf blotch; brown spot of tobacco
资金
- Russian Foundation for Basic Research [15-29-05858 ofi_m, 15-29-05902\16 ofi_m]
- Russian Science Foundation [16-14-00046]
Chitosan hydrolyzate containing low-molecular-weight chitosan (24 kDa) and its oligomers (1.2 kDa) has been obtained via chemical depolimerization of high-molecular-weight chitosan by nitric acid. The fractions of the obtained chitosan hydrolyzate have been characterized by high performance gel permeation chromatography and proton magnetic resonance. The test performed on detached leaves of wheat has shown that the hydrolyzate completely inhibits the development of Stagonospora nodorum, a casual agent of the septoria leaf blotch, at a concentration of 200 mu g/mL. A similar test with detached tobacco leaves has shown that the hydrolyzate at a concentration of 100 mu g/mL also inhibits the development of Alternaria longipes, which causes brown spot of tobacco, by 75%.
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