Journal
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
Volume 10, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fcimb.2020.604504
Keywords
Canescentia; antifungal activity; Pyricularia oryzae; citrus diseases; taxonomy; multigene phylogeny; plant pathology
Categories
Funding
- Key R&D Program of Zhejiang Province, China [2019C02022]
- National Key R&D Program of China [2017YFD0202004]
- University of Mauritius
- MRC [MRC/RUN/1705]
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A novel species of Penicillium, named P. linzhiense, was isolated from soil in Linzhi County, Tibet Autonomous Region, China. DNA sequence analyses indicated it as a new species most closely related to P. janczewskii. The new taxon showed antifungal activity against rice blast pathogen, but not against certain other pathogens, suggesting its potential as a biocontrol agent for economically important phytopathogens.
A novel species of Penicillium, proposed as P. linzhiense sp.nov was isolated from soil collected in Linzhi Town, Linzhi County, Tibet Autonomous Region, China. DNA sequence analyses from eight different gene regions indicate that the isolate represents a novel species and most closely related to P. janczewskii. The phylogenetic analysis based on a concatenated dataset of three genes, ITS, CaM, and BenA, also confirmed the placement of the novel species within the Canescentia section of the genus Penicillium. Differences in morphology among similar species are detailed and single gene phylogenies based on ITS, CaM and BenA genes as well as a multi-loci gene phylogeny are presented. Cultural studies were performed to study inhibitory activities on plant pathogens. The results reveal a notable antifungal activity against Pyricularia oryzae causing rice blast with an inhibition rate up to 77%, while for other three citrus pathogens, Diaporthe citri, Phyllosticta citrichinaensis, and Colletotrichum gloeosporioides, inhibition rate was 40, 50, and 55% respectively. No noticeable effects were observed for Fusarium graminearum, Botryosphaeria kuwatsukai, and Rhizoctonia solani. Interestingly, unlike other reported members of Canescentia, P. linzhiense showed no antagonistic effect on root rotting fungi. The new taxon isolated here has the potential to be used as a biocontrol agent especially for economically important phytopathogens or emerging pathogens on diseases occurring on citrus or rice.
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