Penicillium amapaense sp. nov., section Exilicaulis, and new records of Penicillium labradorum in Brazil isolated from Amazon River sediments with potential applications in agriculture and biotechnology

Abstract

The genus Penicillium is recognized for its ability to produce bioactive molecules with a wide range of biotechnological applications. Currently, the genus is distributed in 28 sections, with more than 50 species in the Exilicaulis section. Representative species of this section are responsible for the production of antimicrobial compounds, but they can also produce genotoxic compounds that affect commercial mushroom production or cause disease in immunosuppressed animals. In the present study, based on morphological characters such as the length of the conidia, phialides and stipes, as well as sequence analysis of the ITS region and partial sequence of CAM, TUB2 and RPB2 loci, we describe a new fungal species denominated Penicillium amapaense and report for the rst time the occurrence of Penicillium labrodorum in Brazil, both of which were isolated from sediments of the Amazon River. The isolates obtained in this study for each species were submitted to antibiosis assays against 12 phytopathogenic fungi that affect important agricultural crops in Brazil and showed inhibition of 11 out of 12 of them. The production of amylase, cellulase and siderophore as well phosphate solubilization was also detected. Metabolomic analysis indicates the ability of P. labrodorum and Penicillium amapaense sp nov. to produce polyketides such as known curvularins and anthraquinones. In addition to these, unknown compounds were also detected. These results indicate the biotechnological and agricultural potential of P. labradorum and P. amapaense.

Penicillium rhizophilum, a novel species in the section Exilicaulis isolated from the rhizosphere of sugarcane in Southwest Iran

“…Since then, six new species were described in sect. Exilicaulis [6][7][8][9], from which four belonged to ser. Restricta, including P. allaniae, P. archerae, P. krskae and P. silybi.…”

Seven New Species of Eurotiales (Ascomycota) Isolated from Tidal Flat Sediments in China

“…With the application of multiple loci phylogeny, the inter-specific relationships within these genera have become more clear [13][14][15]. Currently, the genus Aspergillus comprises 483 species belonging to 27 sections [11,[16][17][18][19][20][21][22], Penicillium contains 530 species in 33 sections [20,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], and Talaromyces includes 204 species in 7 sections [6,18,32,[39][40][41][42]. They show a broad range of habitats, such as woody substratum, sandy soil, tidal flats, water, and indoor air [43][44][45][46][47].…”