Abstract：
:Chelerythrine (CHE) possesses broad pharmacological activities. In this study, the extract of Chelidonium majus L. were characterized by high performance liquid chromatography (HPLC), infrared radiation (IR) spectroscopy and nuclear magnetic resonance (NMR). It was proved that the extract was CHE. The antifungal activity of CHE against five fungal pathogens of rice was researched in vitro, revealing that CHE inhibited Ustilaginoidea virens (U. virens) and Cochliobolus miyabeanus (C. miyabeanus) with 50% effective concentrations (EC50) of 6.53 × 10-3 mg/mL and 5.62 × 10-3 mg/mL, respectively. When the concentration of CHE was 7.5 × 10-3 mg/mL, the inhibition rate of U. virens reached 56.1%. Moreover, CHE (4 × 10-3 mg/mL) exhibited the greatest efficacy in inhibiting spore of U. virens growth with an inhibition rate as high as 86.7%. CHE displayed the best inhibitory activity against U. virens at the concentration of 7.5 × 10-3 mg/mL, compared with the other two isoquinoline alkaloids and commercial fungicide validamycin. After treating U. virens mycelia with CHE, twisted and atrophied mycelia were observed by optical microscopy. SEM results demonstrated narrow and locally fractured mycelium. TEM observations showed that the cell wall had become thin and broken, and most organelles were difficult to recognize. Furthermore, membrane of mycelia was destroyed and reactive oxygen species (ROS) of spores was accumulated, which induced apoptosis of pathogenic fungi. From these results, our understanding of the mechanisms of antifungal activity of CHE against U. virens was enriched and this research is relevant for developing novel pesticides.
journal_name
Pestic Biochem Physioljournal_title
Pesticide biochemistry and physiologyauthors
Wei QH,Cui DZ,Liu XF,Chai YY,Zhao N,Wang JY,Zhao Mdoi
10.1016/j.pestbp.2020.01.007subject
Has Abstractpub_date
2020-03-01 00:00:00pages
140-148eissn
0048-3575issn
1095-9939pii
S0048-3575(20)30015-8journal_volume
164pub_type
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
pub_type： 杂志文章,评审
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journal_title：Pesticide biochemistry and physiology
pub_type： 杂志文章
doi：10.1016/j.pestbp.2018.01.002
更新日期：2018-02-01 00:00:00
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journal_title：Pesticide biochemistry and physiology
pub_type： 杂志文章
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更新日期：2015-03-01 00:00:00
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
pub_type： 杂志文章
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更新日期：2020-02-01 00:00:00
