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广东药科大学 生命科学与生物制药学院,广东省生物活性药物研究重点实验室,广州 510006
冯美茹,在读硕士,从事基础医学研究,E-mail:1097784942@qq.com
邓祖军,博士,教授,从事微生物资源学研究,E-mail:dengzujun66@163.com
收稿日期:2021-02-23,
网络出版日期:2021-03-28,
纸质出版日期:2021-06-05
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冯美茹,施文广,李佳琪等.白花曼陀罗内生真菌多样性及抗皮肤真菌活性分析[J].中国实验方剂学杂志,2021,27(11):187-194.
FENG Mei-ru,SHI Wen-guang,LI Jia-qi,et al.Diversity and Anti-Dermatophyte Activities of Endophytic Fungi from Datura metel[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(11):187-194.
冯美茹,施文广,李佳琪等.白花曼陀罗内生真菌多样性及抗皮肤真菌活性分析[J].中国实验方剂学杂志,2021,27(11):187-194. DOI: 10.13422/j.cnki.syfjx.20210714.
FENG Mei-ru,SHI Wen-guang,LI Jia-qi,et al.Diversity and Anti-Dermatophyte Activities of Endophytic Fungi from Datura metel[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(11):187-194. DOI: 10.13422/j.cnki.syfjx.20210714.
目的
2
分析白花曼陀罗各部位内生真菌的类群结构与多样性,并筛选出具有抗皮肤真菌的活性菌株,为寻找新的抗皮肤真菌先导化合物提供菌株资源。
方法
2
采用组织块法对白花曼陀罗根、茎、叶3个部位的内生真菌进行分离,结合形态学和rDNA-内转录间隔区(ITS)序列分析法对内生真菌进行鉴定,利用琼脂扩散法分析其抗皮肤真菌活性。
结果
2
该研究从白花曼陀罗中分离到292株内生真菌,隶属于34个属,其中根部内生真菌的优势类群为镰刀菌属(
Fusarium
)占72.97%,茎部以镰刀菌属(37.25%)和
Plectosphaerella
(28.43%)为主要类群,而炭疽属(
Colletotrichum
)在叶部的比例最高,达39.66%;叶部内生真菌的分离率(89.23%),定殖率(84.62%)和多样性指数(1.82)明显高于根(70.48%,70.48%,1.23)和茎(69.39%,68.03%,1.64)。35代表性内生真菌发酵液的抗皮肤真菌活性结果表明,它们对犬小孢子菌,黏性毛孢子菌,红毛癣菌、白色念珠菌等皮肤致病真菌的具有抑制作用的菌株分别占总数的97.14%,71.43%,45.71%,25.71%,其中有6株(17.14%)对4种皮肤致病真菌均具有抑制活性,它们分别是
Fusarium
sp. R1,
Penicillium
sp. R5,
Aspergillus
sp. R7,
Metarhizium
sp.
S18,
Diaporthe
sp. S19和
Glomerella
sp.
L57。
结论
2
白花曼陀罗内生真菌具有丰富的物种多样性,其中存在较高比例的具抗皮肤真菌活性菌株,为寻找新的抗皮肤真菌药物提供了菌株资源。
Objective
2
To investigate the taxonomic structure and diversity of endophytic fungi from
Datura metel
and screen the strains with anti-dermatophyte activities, so as to provide resources for the development of new lead compounds against dermatomycosis.
Method
2
Endophytic fungi were isolated from the roots, stems and leaves of
D. metel
after tissue block incubation and then identified by morphological analysis and rDNA-internal transcribed spacer(ITS) sequencing. Their anti-dermatophyte activities were detected by agar diffusion assay.
Result
2
A total of 292 strains of endophytic fungi were isolated from
D. metel
, belonging to 34 genera, with
Fusarium
(72.97%) in roots,
Fusarium
(37.25%) and
Plectosphaerella
(28.43%) in stems, and
Colletotrichum
(39.66%) in leaves as the dominant species. The isolation rate (89.23%), colonization rate (84.62%), and diversity index (1.82) of endophytic fungi in leaves were significantly higher than those in roots (70.48%, 70.48% and 1.23) and stems (69.39%,68.03% and 1.64). The determination of anti-dermatophyte activities of 35 endophytic fungal fermented filtrates showed that the strains exhibiting inhibitory activities against
Microsporum canis
,
Trichosporon mucoides
,
Trichophyton rubrum
and
Candida albicans
accounted for 97.14%, 71.43%, 45.71%, and 25.71%, respectively. Among them, six strains (17.14%), namely
Fusarium
sp. R1,
Penicillium
sp. R5,
Aspergillus
sp. R7,
Metarhizium
sp.
S18,
Diaporthe
sp. S19, and
Glomerella
sp.
L57, all inhibited the four types of cutaneous fungal pathogens.
Conclusion
2
The endophytic fungi in
D. metel
are diverse, and the proportion of endophytic fungi possessing anti-dermatophyte activities is high, allowing them to serve as potential resources for the development of new anti-dermatophyte agents.
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