PLANT DISEASE
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2019
·Vol. 103
·期 10
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IF 3.583
Yuchun Wang,Fei Xiong,Qinhua Lu,Xinyuan Hao,Mengxia Zheng,Lu Wang,Nana Li,Changqing Ding,Xinchao Wang,Yajun Yang
Several Pestalotiopsis -like species cause gray blight disease in tea plants, resulting in severe tea production losses. However, systematic and comprehensive research on the diversity, geographical distribution, and pathogenicity of pathogenic species associated with tea plants in China is limited. In this study, 168 Pestalotiopsis -like isolates were obtained from diseased tea plant leaves from 13 primary tea-producing provinces and cities in China. Based on a multilocus (internal transcribed spacer, translation elongation factor 1-α, and β-tubulin gene region) phylogenetic analysis coupled with an assessment of conidial characteristics, 20 Neopestalotiopsis unclassified isolates, seven Pestalotiopsis species, including two novel ( Pestalotiopsis menhaiensis and Pestalotiopsis sichuanensis ), four known ( Pestalotiopsis camelliae , Pestalotiopsis chamaeropis , Pestalotiopsis kenyana , and Pestalotiopsis rhodomyrtus ) and one indistinguishable species, and three Pseudopestalotiopsis species, including two known ( Pseudopestalotiopsis camelliae-sinensis and Pseudopestalotiopsis chinensis ) and one indistinguishable species, were identified. This study is the first to evaluate Pestalotiopsis chamaeropis on tea plants in China. The geographical distribution and pathogenicity tests showed Pseudopestalotiopsis camelliae-sinensis to be the dominant cause of gray blight of tea plants in China. In vitro antifungal assays demonstrated that theobromine not only derepressed mycelial growth of the 29 representative isolates but also increased their growth. Correlation analysis revealed a linear positive relationship between the mycelial growth rate and pathogenicity ( P = 0.0148).
研究领域:
植物病理学
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真菌学
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产品关联
DOI
PubMed
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2020
·
IF 2.751
Jing Yang,Bo-Wen Zhang,Lian-Nan Lin,Xiao-Li Zan,Guo-Cai Zhang,Guang-Sheng Chen,Jing-Yu Ji,Wei-Hu Ma
Recently, photodynamic therapy (PDT) and photoactivated pesticides have attracted considerable research attention. In the present study, we aimed to investigate the photodynamic activity of a chlorophyllous derivative, sodium pheophorbide a (SPA), and to evaluate its potential as a photoactivated fungicide . The singlet oxygen quantum yield , the photoreaction process, the anti-photobleaching ability in sterile water (H 2 O), the effect of light conditions on its antifungal activity , and its stability were all investigated. SPA showed significant fungicidal activity and photostability, during which Type I and Type II photodynamic reactions occurred simultaneously on Pestalotiopsis neglecta , and the influence of Type I was slightly larger than that of Type II. In addition, light promoted the antifungal activity of SPA. In particular, the antifungal activity was enhanced with increasing light intensity, and was strongest under 8000 lx conditions. Under monochromatic light sources, antifungal activity was strongest under green light s; however, the effect of monochromatic light was not as good as that of white light. From 0 to 24 h, the antifungal effect of the SPA solution was enhanced; however, the activity of the solution began to weaken after 24 h. Furthermore, our study confirmed that the antifungal activity of SPA was stable under different temperatures, pH values, and UV irradiation durations.
研究领域:
植物保护
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微生物学
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农药科学
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DOI
高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·
IF 2.3
Yue Lu,Ming-Hua Duan,Xue Zhao,Yang Zhang,Yu Yang,Rui Xu,Ya-shuai Kang,Zi-Lin Wang,You-Zhi Zhang,Chang-Wei Li
Six previously unreported papulacandins, namely pestiorosins A–F (1–6), were isolated from the fermentation products of the fungus Pestalotiopsis rosea YNJ21 isolated from the fruitbody of Amanita exitialis. The structures of these compounds, along with a known compound called pestiocandin (7), were determined using MS, NMR data, and modified Mosher's method. All compounds exhibited significant antifungal activity against Candida albicans, with MIC values ranging from 0.06 to 2.00 μg/mL. In terms of cytotoxicity assays, compounds 3 and 6 demonstrated moderate inhibitory activity against human breast cancer MCF-7 cells with IC50 values of 24.50 and 16.83 μM, respectively. On the other hand, compound 7 displayed similar levels of inhibitory activity against mice microglial BV2 cells with an IC50 value of 24.51 μM.
研究领域:
微生物学
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药物化学
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天然产物研究
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产品关联
DOI
PubMed
高影响因子
MycoKeys
·
2022
·
IF 3.111
Zhaoxue Zhang,Rongyu Liu,Shubin Liu,Taichang Mu,Xiuguo Zhang,Jiwen Xia
Species of Sporocadaceae have often been reported as plant pathogens, endophytes or saprophytes and are commonly isolated from a wide range of plant hosts. The isolated fungi were studied through a complete examination, based on multilocus phylogenies from combined datasets of ITS/ tub2 / tef1 , in conjunction with morphological characteristics. Nine strains were isolated from Ficus microcarpa , Ilex chinensis and Schima superba in China which represented four species, viz. , Monochaetia schimae sp. nov. , Neopestalotiopsis haikouensis sp. nov. , Neopestalotiopsis piceana and Pestalotiopsis licualicola . Neopestalotiopsis piceana was a new country record for China and first host record from Ficus macrocarpa . Pestalotiopsis licualicola was first report from Ilex chinensis in China.
研究领域:
真菌学
·
植物病理学
·
分类学
·
菌物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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