Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Barboza, E. A.; Cabral, C. S.; Rossato, Maurício; Martins, Fernandes; Reis, Ailton

doi:10.1111/lam.13666

Cited by 4 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analysis of the 5.8S rDNA sequence tree indicated that oomycetes, including Pythium, are evolutionarily distant from other fungi. The findings of Barboza et al [37] also agree with our results of the phylogenetic tree, which grouped the same species in one clade of BLASTn ITS regions. investigated isolate with different percentages (Figure 2B).…”

Section: Isolation and Identification Of The Fungus Isolatesupporting

confidence: 90%

Differences in Pathogenesis-Related Protein Expression and Polyphenolic Compound Accumulation Reveal Insights into Tomato–Pythium aphanidermatum Interaction

et al. 2023

View full text Add to dashboard Cite

Plant diseases significantly reduce crop yields, threatening food security and agricultural sustainability. Fungi are the most destructive type of phytopathogen, and they are responsible for major yield losses in some of the most crucial crops grown across the world. In this study, a fungus isolate was detected from infected tomato plants and molecularly identified as Pythium aphanidermatum (GenBank accession number MW725032). This fungus caused damping-off disease and was shown to be pathogenic. Moreover, the expression of five pathogenesis-related genes, namely PR-1, PR-2, PR-3, PR-4, and PR-5, was quantitatively evaluated under the inoculation of tomato with P. aphanidermatum. The quantitative polymerase chain reaction (qPCR) showed that the expression levels of PR-1, PR-2, and PR-5 genes went up significantly at 5 days post-inoculation (dpi). The expression of the PR-1 gene also increased the variably, which reached its highest value at 20 dpi, with a reported relative expression level 6.34-fold higher than that of the control. At 15 dpi, PR-2 and PR-5 increased the most, while PR-1, PR-3, and PR-5 also increased noticeably at 20 dpi. On the contrary, PR-4 gene expression significantly decreased after inoculation, at all time intervals. Regarding PR-5 gene expression, the data showed a variable change in PR-5 gene expression at a different sample collection period. Still, it was highly expressed at 15 dpi and reached 3.99-fold, followed by 20 dpi, where the increasing percentage reached 3.70-fold, relative to the untreated control. The HPLC analysis indicated that the total concentration of all detected polyphenolic compounds was 3858 µg/g and 3202.2 µg/g in control and infected plant leaves, respectively. Moreover, the HPLC results concluded that Pythium infection decreased phenolic acids, such as chlorogenic and ellagic acids, which correlated with the infection–plant complex process. Based on the results, P. aphanidermatum could be a biotic stress pathogen that causes the expression of pathogen-related genes and stops the regulation of defensin phenolic compounds.

show abstract

Section: Isolation and Identification Of The Fungus Isolatesupporting

confidence: 90%

Differences in Pathogenesis-Related Protein Expression and Polyphenolic Compound Accumulation Reveal Insights into Tomato–Pythium aphanidermatum Interaction

et al. 2023

View full text Add to dashboard Cite

show abstract

“…It is known that purslane can represent a source of inoculum for some important pathogens without being damaged. Important pathogens like Phytophthora capsici [183], Globisporangium sylvaticum, and G. ultimum [184] were associated with roots of P. oleracea. In both studies, artificial inoculation trials failed to cause any visible symptoms.…”

Section: Portulaca Oleraceamentioning

confidence: 99%

Fungal and Fungal-like Diseases of Halophytes in the Mediterranean Basin: A State-of-the-Art Review

Delli Compagni,

Pardossi,

Pecchia

2024

Horticulturae

View full text Add to dashboard Cite

Halophytes are salt-tolerant plants growing in saline ecosystems and are spread throughout the Mediterranean area. Recently, there has been a renewed interest in agricultural exploitation of halophytes, but poor attention has been given to pest and disease management of these species. The objective of this review is to assess the extent and distribution of pathogenic fungal and fungal-like (Oomycota) organisms on major Mediterranean halophytes. We retrieved 92 references spanning over 100 years, with more than half published since 2000. Ascomycota is the best-represented phylum, and the order Pleosporales has the highest species diversity. The order Pucciniales prevails in Basidiomycota, whereas Peronosporales is the richest order within Oomycota. Most of the pathogenic species have been isolated from aboveground organs, especially from leaves. Portulaca oleracea is the species with the most associated pathogens (16) and records (28). Leveillula powdery mildew, caused by Leveillula taurica, is the most common disease among the selected species. Cakile maritima was found to be vulnerable to different mycotoxigenic Alternaria species. Strengthening the research on diseases of halophytes is essential to successfully grow these species and to evaluate the risks related to the presence of mycotoxigenic species, which is crucial for the effective exploitation of halophytes as crops.

show abstract

First report of Pythium aphanidermatum causing damping off, collar and root rot of coriander in Brazil

Silva,

Brito,

Mesquita

et al. 2024

J Gen Plant Pathol

View full text Add to dashboard Cite

Pythium and Phytopythium species associated with weeds collected in vegetable production fields in Brazil

Cited by 4 publications

References 43 publications

Differences in Pathogenesis-Related Protein Expression and Polyphenolic Compound Accumulation Reveal Insights into Tomato–Pythium aphanidermatum Interaction

Differences in Pathogenesis-Related Protein Expression and Polyphenolic Compound Accumulation Reveal Insights into Tomato–Pythium aphanidermatum Interaction

Fungal and Fungal-like Diseases of Halophytes in the Mediterranean Basin: A State-of-the-Art Review

First report of Pythium aphanidermatum causing damping off, collar and root rot of coriander in Brazil

Contact Info

Product

Resources

About