First Report of Globisporangium spinosum Causing Root Rot of Panax notoginseng in China DOI

Chao Huo,

Jifen Cao,

Kuo Wu

et al.

Plant Disease, Journal Year: 2023, Volume and Issue: 107(9), P. 2891 - 2891

Published: April 21, 2023

Panax notoginseng (Burkill) F.H. Chen, known as ''sanqi'', is widely used for its medicinal and tonic effects in China, such treatment of cardiovascular diseases antioxidant effects. However, root rot disease the most destructive that hampers industrial development (Mi et al. 2017). In August 2018 2019, samples displaying symptoms rot, unnormal, stunted growth chlorotic leaves, were dug out with a shovel put clean sample-bags from four production bases Wenshan (around 23.5° N; 104° E), Yunnan province, biggest "sanqi" area over 20 thousand ha. Among bases, incidence typically ranged 10% to 20%, but few number severe cases, exceeded 70%. Typical symptomatic tubers washed tap water, surface-sterilized 5% NaClO 1 min followed by 70% alcohol 30 s, rinsed three times sterile water. The diseased tissues excised placed on rye sucrose agar medium (RSA) supplemented 25 mg/L rifampin 50 kanamycin, then incubated at 25°C dark five days. Colonies different features grew pieces twenty oomycete-like colonies, (white, dense, aerial mycelia rapid radiate growth) chosen further investigation. Microscopic observations showed terminal intercalary hyphal swellings, which either globose or limoniform, thin-walled, mostly smooth, 13-28 µm wide (average 20.3 µm). Oogonia rarely fusiform, intercalary, 11-19 13 µm), provided varying blunt, digitate projections. Oospores plerotic, aplerotic, 16-19 μm 18.6 μm). Antheridia usually originated various distances oogonium appeared- clavate crook-necked, making apical contact oogonium. Based typical morphological described, isolates putatively identified Pythium spinosum (van der Plaats-Niterink 1981). internal transcribed spacer region (ITS) cytochrome c oxidase subunit II (CoxII) SQ00803 SQ00903-1 sequenced using universal primers ITS1/ITS4 FM58/FM66 (Villa 2006). nucleotide sequences deposited GenBank accession numbers MN369530, MN370548, MN561687 MN561688, respectively. Blastn analysis ITS 99.58% similarity those Globisporangium CBS275.67 CBS276.67 (accession AY598701 HQ643792). CoxII 99.82% 100% G. GU071755 AF196616). For pathogenicity tests, nine two-year-old healthy sanqi plants grown sterilized substrate plastic pots under greenhouse conditions inoculated 5×104 CFU/ml zoospore suspension root-drenching method (Dixon 1984). Three non-inoculated drenched water controls. All chamber 16/8-h photoperiod. After two weeks, discoloration chlorosis leaves water-soaked rot. Control symptomless healthy. resembling re-isolated infected same spinosum, thus fulfilling Koch's postulates. originally isolated seedlings Anthirrhinum majus has been reported cause many plant species worldwide (Lévesque De Cock 2004). Recently, based whole genome sequencing phylogenomic analysis, P. was transferred genus. Therefore, now classified (Hai 2022). To our knowledge, this first report causing China. This research will contribute integrated management strategies

Language: Английский

Current trends, limitations and future research in the fungi? DOI Creative Commons
Kevin D. Hyde, Petr Baldrián, Yanpeng Chen

et al.

Fungal Diversity, Journal Year: 2024, Volume and Issue: 125(1), P. 1 - 71

Published: March 20, 2024

Abstract The field of mycology has grown from an underappreciated subset botany, to a valuable, modern scientific discipline. As this study grown, there have been significant contributions science, technology, and industry, highlighting the value fungi in era. This paper looks at current research, along with existing limitations, suggests future areas where scientists can focus their efforts, mycology. We show how become important emerging diseases medical discuss trends potential drug novel compound discovery. explore phylogenomics, its potential, outcomes address question phylogenomics be applied fungal ecology. In addition, functional genomics studies are discussed importance unravelling intricate mechanisms underlying behaviour, interactions, adaptations, paving way for comprehensive understanding biology. look research building materials, they used as carbon sinks, biocircular economies. numbers always great interest often written about estimates varied greatly. Thus, we needs order obtain more reliable estimates. aspects machine learning (AI) it mycological research. Plant pathogens affecting food production systems on global scale, such, needed area, particularly disease detection. latest data High Throughput Sequencing if still gaining new knowledge same rate before. A review nanotechnology is provided addressed. Arbuscular Mycorrhizal Fungi addressed acknowledged. Fungal databases becoming important, therefore provide major databases. Edible medicinal huge medicines, especially Asia prospects discussed. Lifestyle changes (e.g., endophytes, pathogens, and/or saprobes) also extremely trend special issue Diversity.

Language: Английский

Citations

38

What are the 100 most cited fungal genera? DOI

C.S. Bhunjun,

Yijun Chen, Chayanard Phukhamsakda

et al.

Studies in Mycology, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Citations

24

New-Generation Sequencing Technology in Diagnosis of Fungal Plant Pathogens: A Dream Comes True? DOI Creative Commons
Maria Aragona, Anita Haegi,

Maria Teresa Valente

et al.

Journal of Fungi, Journal Year: 2022, Volume and Issue: 8(7), P. 737 - 737

Published: July 16, 2022

The fast and continued progress of high-throughput sequencing (HTS) the drastic reduction its costs have boosted new unpredictable developments in field plant pathology. cost whole-genome sequencing, which, until few years ago, was prohibitive for many projects, is now so affordable that a branch, phylogenomics, being developed. Fungal taxonomy deeply influenced by genome comparison, too. It easier to discover genes as potential targets an accurate diagnosis or emerging pathogens, notably those quarantine concern. Similarly, with development metabarcoding metagenomics techniques, it possible unravel complex diseases answer crucial questions, such “What’s my soil?”, good approximation, including fungi, bacteria, nematodes, etc. technologies allow redraw approach disease control strategies considering pathogens within their environment deciphering interactions between microorganisms cultivated crops. This kind analysis usually generates big data need sophisticated bioinformatic tools (machine learning, artificial intelligence) management. Herein, examples use research fungal diversity some are reported.

Language: Английский

Citations

37

New Biotechnological Production of EPA by Pythium irregulare Using Alternative Sustainable Media Obtained from Food Industry By-Products and Waste DOI Open Access
Giovanni Luca Russo, Antonio Luca Langellotti, Beatriz Martín-García

et al.

Sustainability, Journal Year: 2023, Volume and Issue: 15(2), P. 1147 - 1147

Published: Jan. 7, 2023

Long-chain polyunsaturated fatty acids (LC-PUFAs) have multiple beneficial effects on human health, in particular docosahexaenoic acid (DHA, 22:6, n-3) and eicosapentaenoic (EPA, 20:5, n-3). A variety of microorganisms has been used for the commercial production non-animal-source LC-PUFAs. The oomycetes Pythium family are promising EPA producers, this work, optimization irregulare growth using food industry by-products wastes as cheap sources nutrients was carried out. Sugar cane molasses (SCM), spent brewery yeast (SBY), cheese whey (CW), expired orange juice (EFJ) were tested. combination SBY a source nitrogen EFJ organic carbon resulted best outcome among other sustainable media ingredients. new medium conducted through response surface methodology factors. results show significant positive impact these factors biomass productivity (p < 0.005), with an optimized yield 14.22 g L−1, lipid 2.23 concentration 155 mg L−1.

Language: Английский

Citations

11

An Improved Sporulation Method for Producing Asexual Zoospores of Pythium aphanidermatum on Culture Medium DOI Creative Commons
Yu Jin Kim,

So-Hyeon Baek,

Elena Volynchikova

et al.

Mycobiology, Journal Year: 2025, Volume and Issue: 53(1), P. 120 - 127

Published: Jan. 2, 2025

An improved sporulation method for Pythium aphanidermatum on 10% V8-juice agar was developed to generate substantial quantities of zoospores. We conducted experiments using a 4 × factorial design evaluate the effects temperature (20, 25, 30, and 35 °C) incubation time (2, 3, 4, 5 days) zoospore production from isolates HSv05 KACC 48066. The results indicated that 30 °C consistently yielded highest numbers zoospores across all periods. Applying same (30 periods other (CCp03, CCp04, CCp05, HSv10, 40156) also resulted in higher regardless times compared with under control condition (25 2 days). Further virulence tests isolate revealed high concentrations (5 102 - 105 zoospores/ml) induced severe rot symptoms; however, low concentration zoospores/ml produced only considerably weak symptoms inoculated potato tubers. No appeared tubers 0 (uninoculated control) or 101 zoospores/ml. These findings suggest our can help obtain adequate various basic applied studies, including pathogen identification, assessment, resistance resource screening, strategy development.

Language: Английский

Citations

0

Two new species of Elongisporangium recovered from forest environments in Japan DOI

Kayoko Otsubo,

Koji Kageyama, Hayato Masuya

et al.

Mycological Progress, Journal Year: 2025, Volume and Issue: 24(1)

Published: March 13, 2025

Language: Английский

Citations

0

Highly sensitive multiplex PCR for convenient quantification and differentiation of canine Oomycota pathogens: Pythium insidiosum , Lagenidium giganteum f. caninum, and Paralagenidium karlingii DOI Creative Commons

Asfiha Tarannum,

Subarna Barua, Leonel Mendoza

et al.

Microbiology Spectrum, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

ABSTRACT Oomycota mammalian pathogens, including Pythium ( P .) insidiosum , Lagenidium L giganteum f. caninum and Paralagenidium Para karlingii are increasingly recognized as causes of life-threatening infections in dogs, with diagnosis complicated by their clinical phenotypic resemblance to fungal pathogens. Traditional diagnostic methods, such serology, histopathology, culture, often lack sensitivity specificity, delaying appropriate management. Here, we developed a multiplex PCR assay remarkable sensitivity, detecting few one DNA copy per reaction for P. Para. 10 copies L. . Validation on pure isolates from ATCC USDA-ARS other confirmed the assay’s correctly identifying all three pathogens showing no cross-reactivity non-target isolates. Interestingly, revealed that 45.5% (40/88) serum samples positive anti- antibody contained DNA. Additionally, among 24 suspected antibody-positive samples, 54.2% (13/24) tested DNA, while 8.3% (2/24) By allowing simultaneous detection differentiation these single reaction, significantly reduces time resource requirements. This highly sensitive tool holds promise enhancing speed accuracy infection well species, humans. could enable prompt implementation species-specific followed early intervention, ultimately resulting improved outcomes. IMPORTANCE study addresses critical gap caused —Pythium —in dogs. These misdiagnosed due overlapping features, require accurate treatment. Current time-consuming, prone inconclusive results. The newly offers transformative solution enabling specificity. not only but also enhances pathogen identification, paving way earlier intervention Moreover, its potential application humans, underscores broader significance managing infections.

Language: Английский

Citations

0

Pp07886, a glycoside hydrolase family 5 protein from Pythium porphyrae, is a required virulence factor and induces host disease resistance DOI
Huichao Yang,

Zhaolan Mo,

Peiwen Weng

et al.

Algal Research, Journal Year: 2025, Volume and Issue: unknown, P. 104096 - 104096

Published: May 1, 2025

Language: Английский

Citations

0

Oomycete communities are influenced by land use and disease status in Christmas tree production in Southern Québec, Canada DOI Creative Commons
Hervé Van der Heyden, Marc‐Olivier Duceppe, Guillaume Charron

et al.

Environmental DNA, Journal Year: 2024, Volume and Issue: 6(2)

Published: March 1, 2024

Abstract Forests are threatened by many natural stressors intensified climate change and anthropogenic activities, which tend to increase their susceptibility pests pathogens. Consequently, oomycete‐related forest decline or dieback cases increasing in natural, urban, agricultural landscapes. It is this context that Christmas tree growers from Southern Québec, Canada, experiencing root rot problems, with reported incidences up 25%. In a previous study, seven Phytophthora spp. were associated problem, but the overall diversity of oomycetes has not yet been investigated. Hence, we use metabarcoding approach provide an overview diversity, richness, composition oomycete community fir plantations compared surrounding forests. We showed P. cryptogea cluster, europaea sansomeana , chlamydospora cluster significantly more abundant soils collected under diseased trees confirmed (including abietivora ) was most frequently showing rot‐like symptoms. Finally, report land (anthropogenic activities) shapes while can act as gateway for invading fact, results presented here suggested might already have crossed boundary other species follow, advocating importance improved surveillance various environments.

Language: Английский

Citations

3

An assessment of the species diversity and disease potential of Pythium communities in Europe DOI Creative Commons

Wilken Boie,

Markus Schemmel,

Wanzhi Ye

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 27, 2024

Language: Английский

Citations

3