文献类型: 外文期刊
作者: Shi, Zhiqi 1 ; Shen, Shouguo 1 ; Zhou, Wei 1 ; Wang, Fei 1 ; Fan, Yongjian 1 ;
作者机构: 1.Jiangsu Acad Agr Sci, Food Safety Res & Serv Inst, Nanjing 210014, Peoples R China
关键词: Fusarium graminearum;osthol;inhibition;glucose starvation;chitinase activity
期刊名称:INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES ( 影响因子:5.923; 五年影响因子:6.132 )
ISSN: 1661-6596
年卷期: 2008 年 9 卷 3 期
页码:
收录情况: SCI
摘要: The effects of osthol, a plant coumarin, on morphology, sugar uptake and cell wall components of Fusarium graminearum were examined in vitro by electron microscopy, (14)C-labelling and enzyme activity detection. The results revealed that osthol could inhibit the hypha growth of F. graminearum by decreasing hyphal absorption to reducing sugar. After treatment with 100 mu g.mL(-1) osthol for 24 h, many hyphal fragments of F. graminearum appeared. Microscopy observation showed that the cell walls of hyphal fragments blurred and the organelles of the cells degraded with the increasing vacuoles. The N-acetyl-D-glucosamine contents and chitinase activity both increased when hypha were treated with 100 mu g.mL(-1) osthol, whereas the activity of beta-1, 6-glucanase remained unchanged. When F. graminearum fed with (14)C glucose was treated with 100 mu g.mL(-1) osthol, glucose contents decreased to the lowest level, while the contents in non-osthol treated controls remained unchanged. These results suggested that chitinase activity might be related to glucose starvation under osthol treatment, and that the appearance of hyphae fragments maybe the results of the promoted chitinase activity which itself triggered chitin degradation.
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