Periconia Sp Research Articles

New Quinoa Disease (Chenopodium Quinoa Willd.) in Tropicalized and not Tropicalized Quinoa Crops in the Tropical Region of Cochabamba, Bolivia

Quinoa (Chenopodium quinoa Willd.) is traditionally cultivated in the Bolivia and Peru Andean region. In Bolivia, it is mainly cultivated in the southern, central and northern altiplano highlands (3800 masl). In recent years, research has been done on the tropicalization of this crop to introduce it to tropical regions of Bolivia for export purposes. In 2024, quinoa was planted in a location in the tropical Chapare (250 masl) Cochabamba region, a tropicalized variety (UAGRM-FINE) and another non-tropicalized variety from the Altiplano. In the fruiting and grain filling phenological phase, a disease occurred affecting both varieties, although with a higher incidence in the nontropicalized variety. After laboratory observation in a lactophenol solution, its morphological characteristics as conidiophore and conidia are coincident with the Periconia sp description. In conclusion, it is a new quinoa disease that affects tropicalized and non-tropicalized varieties in Bolivia.

Aqueous Co removal by mycogenic Mn oxides from simulated mining wastewaters

Naturally occurring manganese (Mn) oxide minerals often form by microbial Mn(II) oxidation, resulting in nanocrystalline Mn(III/IV) oxide phases with high reactivity that can influence the uptake and release of many metals (e.g., Ni, Cu, Co, and Zn). During formation, the structure and composition of biogenic Mn oxides can be altered in the presence of other metals, which in turn affects the minerals’ ability to bind these metals. These processes are further influenced by the chemistry of the aqueous environment and the type and physiology of microorganisms involved. Conditions extending to environments that typify mining and industrial wastewaters (e.g., increased salt content, low nutrient, and high metal concentrations) have not been well investigated thus limiting the understanding of metal interactions with biogenic Mn oxides. By integrating geochemistry, microscopic, and spectroscopic techniques, we examined the capacity of Mn oxides produced by the Mn(II)-oxidizing Ascomycete fungus Periconia sp. SMF1 isolated from the Minnesota Soudan Mine to remove the metal co-contaminant Co(II) from synthetic waters that are representative of mining wastewaters currently undergoing remediation efforts. We compared two different applied remediation strategies under the same conditions: coprecipitation of Co with mycogenic Mn oxides versus adsorption of Co with pre-formed fungal Mn oxides. Co(II) was effectively removed from solution by fungal Mn oxides through two different mechanisms: incorporation into, and adsorption onto, Mn oxides. These mechanisms were similar for both remediation strategies, indicating the general effectiveness of Co(II) removal by these oxides. The mycogenic Mn oxides were primarily a nanoparticulate, poorly-crystalline birnessite-like phases with slight differences depending on the chemical conditions during formation. The relatively fast and complete removal of aqueous Co(II) during biomineralization as well as the subsequent structural incorporation of Co into the Mn oxide structure illustrated a sustainable cycle capable of continuously remediating Co(II) from metal-polluted environments.

Two new lanostane-type triterpenoids from the fungus Periconia sp. TJ403-rc01

The endophytic fungus Periconia sp. TJ403-rc01 (Dematiaceae) isolated from the leaves of Rosa chinensis Jacq. (Rosaceae) was cultivated on rice medium and chemically investigated, affording two new lanostane-type triterpenoids, namely pericinones A and B (1 and 2). Their structures were determined mainly by 1 D and 2 D NMR and HRESIMS data. Notably, it is the first report of lanostane-type triterpenoids from species of Periconia. Compounds 1 and 2 showed moderate anti-inflammatory activity against the NO production with IC50 values of 24.12 ± 0.73 and 11.38 ± 1.56 μM, respectively.

Sesquiterpenes from the endophytic fungus Periconia sp. F-31

One new eremophilane sesquiterpene periconianone L (1), together with four known guaiane-type sesquiterpenes 4,10,11-trihydroxyguaiane (2), (−)-guai-1(10)-ene-4α,11-diolhydroxymecuration (3), guaidiol A (4), and epi-guaidiol A (5) were isolated from the endophytic fungus Periconia sp. F-31. The structure of the new compound was established by spectroscopic methods, including UV, IR, HRESIMS, and extensive NMR techniques. Compound 3 was isolated as natural product for the first time.

Two new 5/6/6 polyketide-amino acid hybrids from a genetic mutant of Periconia sp. F-31

Peridecalins C and D (1 and 2), one decalin and one oxygen-decalin containing polyketide-amino acid hybrids with 5/6/6 ring system, was isolated from a genetic mutant of Periconia sp. F-31. Their structures were elucidated through extensive spectroscopic data analysis, including 1 D/2D NMR and HR-MS spectra. Biosynthetically, two proposed Diels-Alder reactions are supposed to be involved in the skeleton construction of 1 and 2.

Isolation of Endophytic Fungi from Vitex trifolia L and Antagonism Test against Sclerotium rolfsii and pathogenic bacteria

Plant damage by pathogenic fungi is often found in plants, one of which is caused by Sclerotium rolfsii. Biological control strategy offers a promising alternative for managing disease in plants because they are environmental friendly compared to pesticides application. One of the biological control offered is by using endophytic fungi isolated from Vitex trivolia L. The aim of the study was to isolate, to identify macroscopic and microscopic endophytic fungi from Vitex trifolia L and to test their antagonism potency against the pathogenic fungus Sclerotium rolfsii in vitro. The isolation obtained 7 endophytic fungi isolates identified based on their genus characteristics, nsmely Periconia sp, Aspergillussp, Dendrophoma sp, Geotrichum sp, Ampulliferina sp, Chalara sp, dan Bispora sp and 2 isolates have not been identified. The Antibacterial test of the fungi isolate on the 4 tested bacteria showed that of all the fungi isolate have low activity. The antagonism test using the direct opposition method with the PIRG formula, showed that the 3 isolates had high percentage of growth inhibition, in which ALJ1, BLJ5, and ALJ3 isolate has  85%, 90%, and 100% respectively. This potency could be used as biological agents on the pathogenic fungus Sclerotium rolfsii.

Periconia species - An unusual fungal pathogen causing mycotic keratitis

PurposeThe purpose of this study is to determine the epidemiology, risk factors, clinical features, and treatment outcome of molecularly diagnosed Periconia keratitis. MethodsClinical records of all culture proven fungal ulcers with molecular identification suggestive of Periconia species who presented to a single tertiary referral center from January 2012 to December 2013 were retrospectively analysed. ResultsAmong 1356 cases of keratomycosis, 8 (0.6%) patients were affected due to Periconia species. The mean age of presentation was 59 years with males (n = 6; 75%) were more commonly affected than females (n = 2; 25%). Significant history of trauma was present only in one patient. The infiltrate size was less than 5 mm in majority of patients 75% (n = 6). 50% (n = 4) responded to antifungal, 12.5% (n = 1) responded to antibacterial, 12.5% (n = 1) required therapeutic penetrating keratoplasty, 25% (n = 2) lost to follow up after first visit. The mean duration of treatment in healed cases was 20 days. ConclusionThis is the first report on Periconia sp causing human corneal ulcer. This study signifies the importance of molecular identification in the diagnosis of rare fungi which will improve our understanding on disease pathology and outcome. Visual prognosis appears good if the infection is diagnosed and topical antifungal interventions started early.

Three new compounds from endophytic fungus Periconia sp. F-31

Three new compounds from endophytic fungus Periconia sp. F-31

Periconiastone A, an Antibacterial Ergosterol with a Pentacyclo[8.7.0.01,5.02,14.010,15]heptadecane System from Periconia sp. TJ403-rc01.

Periconiastone A (1), an ergosterol with an unprecedented pentacyclo[8.7.0.01,5.02,14.010,15]heptadecane system, was isolated from Periconia sp. TJ403-rc01. Its structure was assigned by extensive spectroscopic analyses and quantum-chemical 13C NMR and ECD calculations. A vinylogous α-ketol rearrangement and an aldol condensation reaction during biosynthesis were proposed as key steps for the formation of 1. Compound 1 showed antibacterial activity against Gram-positive S. aureus and E. faecalis with MIC values of 4 and 32 μg/mL, respectively.

Biosynthetic Hypothesis-Guided Discovery and Total Syntheses of PKS-NRPS Hybrid Metabolites from Endophytic Fungus Periconia Species.

Guided by our biosynthetic hypothesis, pericoannosins C-F, four new PKS-NRPS hybrid metabolites, were discovered from the endophytic fungus Periconia sp. F-31. Their structures and absolute configurations were elucidated by extensive spectroscopic data and electronic circular dichroism analyses. Preliminary biological evaluation revealed that pericoannosins C-D exhibited anti-HIV activities with IC50 values of 15.5 and 13.5 μM. Furthermore, the bioinspired syntheses of pericoannosins C-E have also been completed with high efficiency.

Total Synthesis of Pericoannosin A.

The first total synthesis of pericoannosin A (1) containing 15 steps in the longest linear sequence with an overall yield of 5.5% is reported. The hybrid peptide-polyketide was isolated from the endophytic fungus Periconia sp. F-31 and bears a unique tricyclic core structure. The key steps are a glycolate aldol reaction and a Diels-Alder reaction utilizing an Evans auxiliary for controlling the stereochemistry. Furthermore, a late-stage equilibration was employed.

Four new monoterpenoids from an endophytic fungus Periconia sp. F-31

Five monoterpenoids were isolated from the endophytic fungus Periconia sp. F-31, including three new carene-type monoterpenoids, 2-carene-5,8-diol (1), 2-carene-8,10-diol (2), 2-carene-8-acetamide (3), one new menthene-type monoterpenoid 8-hydroxy-1,7-expoxy-2-menthene (4), and one known monoterpenoid anethofuran (5). The structures of all compounds were elucidated based on a comprehensive spectroscopic data analysis, electronic circular dichroism (ECD), and calculated ECD.

Periconiasins I and J, two new cytochalasans from an endophytic fungus Periconia sp.

Two new cytochalasans, periconiasin I (1) with 9/6/5 tricyclic ring, and periconiasin J (2) with 5/6/6/5 tetracyclic ring, were isolated from the endophytic fungus Periconia sp. F-31. Their structures including absolute configurations were elucidated through extensive spectroscopic analyses, calculated ECD, and the circular dichroism data of the [Rh2(OCOCF3)4] complex. Compound 1 showed in vitro cytotoxicity against human MCF-7 tumor cell line with an IC50 value of 4.8μM, compound 2 exhibited weak anti-HIV activity with an IC50 value of 25.0μM.

Periconones B–E, new meroterpenoids from endophytic fungus Periconia sp.

Periconones B–E (1–4), four new polyketide–terpenoid hybrid molecules were isolated from the endophytic fungus Periconia sp. F-31. Their structures and absolute configurations were established by extensive spectroscopic data analysis and electronic circular dichroism (ECD). Compound 4 exhibited in vitro cytotoxic activity against the human MCF-7 tumor cell line with an IC50 value of 4.2μmol/L, and compound 1 displayed anti-HIV activity with an IC50 value of 18.0μmol/L.

Eremophilane Sesquiterpenes from an Endophytic Fungus Periconia Species.

Nine new polyoxygenated eremophilane sesquiterpenes, periconianones C-K (1-9), including one unusual isoeremophilane sesquiterpene, periconianone C (1), and four trinor-eremophilane sesquiterpenes, periconianones H-K (6-9), were isolated from the endophytic fungus Periconia sp. F-31. Compound 1 is the first furan-type isoeremophilane reported containing a linkage of C-8/C-11 and a 7,12-epoxy moiety. These compound structures, including absolute configurations, were elucidated through extensive spectroscopic data analysis, electronic circular dichroism, Mo2(AcO)4-induced circular dichroism, and single-crystal X-ray diffraction (Cu Kα). Compounds 2, 5, and 9 showed inhibition effects on lipopolysaccharide-induced NO production in BV2 cells by 10.2%, 18.3%, and 16.1% at a concentration of 1.0 μM, respectively, which is comparable to the positive control curcumin (12.9% at 1.0 μM).

ChemInform Abstract: Periconiasin G, a New Cytochalasan with Unprecedented 7/6/5 Tricyclic Ring System from the Endophytic Fungus Periconia sp.

AbstractNew cytochalasans, periconiasin G (I) and periconiasin H (II) are isolated from Periconia sp.

A new polyketide synthase−nonribosomal peptide synthetase hybrid metabolite from plant endophytic fungus Periconia sp.

Abstract A new polyketide synthase–nonribosomal peptide synthetase (PKS–NRPS) hybrid metabolite, named pericoannosin B (1), was isolated from endophytic fungus Periconia sp. F-31 of the medicinal plant Annona muricata. The structure and absolute configuration were elucidated by means of extensive spectroscopic analyses (HRMS, NMR, IR, and CD).

Periconiasin G, a new cytochalasan with unprecedented 7/6/5 tricyclic ring system from the endophytic fungus Periconia sp.

Two new cytochalasans, periconiasin G (1) and periconiasin H (2) were isolated from endophytic fungus Periconia sp. F-31. Compound 1 is the first cytochalasan with a 7/6/5 tricyclic ring system, and compound 2 possesses a rare sulfoxide group. Their structures including absolute configurations were elucidated by extensive spectroscopic analyses and ECD calculations. A possible biogenetic pathway for these two compounds was proposed. Compound 1 showed weak anti-HIV activity with IC50 value of 67.0μM.

Pericoannosin A, a Polyketide Synthase-Nonribosomal Peptide Synthetase Hybrid Metabolite with New Carbon Skeleton from the Endophytic Fungus Periconia sp.

Four new polyketide synthase-nonribosomal peptide synthetase (PKS-NRPS) hybrid metabolites, pericoannosin A (1), with an unusual hexahydro-1H-isochromen-5-isobutylpyrrolidin-2-one skeleton, and three cytochalasans, periconiasins D-F (2-4), were isolated from the endophytic fungus Periconia sp. F-31. Their structures and absolute configurations were elucidated through extensive spectroscopic analyses, calculated ECD, and single-crystal X-ray diffraction (Cu Kα). A possible biogenetic pathway is proposed. Compounds 1 and 4 showed anti-HIV activity with IC50s of 69.6 and 29.2 μM, respectively.

A new lactone derivative from plant endophytic fungus Periconia sp. F-31

To investigate the secondary metabolites of endophytic fungi Pericinia sp. F-31. Column chromatography on silica gel, Sephadex LH-20 and semi-preparative HPLC were used to separate and purify the compounds. Two compounds were isolated from the fermentation broth of Periconia sp. Their structures were identified as 5-(1-hydroxyhexyl) -6-methyl-2H-pyran-2-one (1) and 2-(3-hydroxy-4-methylphenyl) -propanoic acid (2). Compound 1 was a new lactone compound, compound 2 was new natural product, and the NMR data of compound 2 was reported for the first time.