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.
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.
Diversity and Anti-Dermatophyte Activities of Endophytic Fungi from Datura metel
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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