Oomicetos do Parque Estadual da Serra da Cantareira, São Paulo, SP, Brasil

Miranda, Maria Luiza de; Pires-Zottarelli, Carmen Lidia Amorim

doi:10.1590/s2236-89062012000100005

Cited by 9 publications

(8 citation statements)

References 7 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is a new citation for the studied area. Illustration of the species in Miranda & Pires-Zottarelli (2012). Identification: The production of the spherical, unsymmetrical and bursiform zoosporangia, their insertion in the hyphae at right angles, the internal proliferation and the zoospores discharge of them confirmed the morphological identification of the isolate at genus level, as mentioned by Sparrow (1960).…”

Section: Leptolegniella Exogenasupporting

confidence: 52%

Occurrence and distribution of the heterotrophic straminipiles from Brazilian Atlantic Rainforest areas

Pires-Zottarelli,

Jesus,

Colombo

et al. 2023

Hoehnea

Self Cite

View full text Add to dashboard Cite

We present herein the occurrence and distribution of the heterotrophic straminipiles collected from soil and water, submerged leaves and surface sediment from freshwater bodies at “Mosaico de Unidades de Conservação Juréia-Itatins”, a preserved conservation unit of the Brazilian Atlantic Rainforest. From 180 collected samples, we isolated 41 taxa belonging to Hyphochytriomycota and Oomycota using the multiple baiting technique, with several new taxa to the science, new occurrences to São Paulo State or Brazil, and all new citation to the studied area. These taxa were identified based on morphological and/or molecular data, with several genic regions made available in GenBank. The calculated community structure of these zoosporic organisms showed a diverse community, with few dominant taxa, without significant differences (P≤0.05) among the different types of samples.

show abstract

Section: Leptolegniella Exogenasupporting

confidence: 52%

Occurrence and distribution of the heterotrophic straminipiles from Brazilian Atlantic Rainforest areas

Pires-Zottarelli,

Jesus,

Colombo

et al. 2023

Hoehnea

Self Cite

View full text Add to dashboard Cite

show abstract

“…Phragmosporangium is a monospecific genus created to accommodate Phragmosporangium uniseriatum (Johnson Jr et al 2005b). This species was reported in Brazil as the second world occurrence (Pires-Zottarelli et al 2007) and is a very common saprotroph in soil samples of Brazilian biomes (Miranda and Pires-Zottarelli 2012, Nascimento and Pires-Zottarelli 2012, Pires-Zottarelli and Michelin 2012. Our phylogeny undoubtedly indicates that this genus is a member of the Verrucalvaceae.…”

Section: Discussionmentioning

confidence: 93%

New phylogenetic insights into Saprolegniales (Oomycota, Straminipila) based upon studies of specimens isolated from Brazil and Argentina

Rocha

Lopez-Lastra²,

Marano

et al. 2018

Mycol Progress

View full text Add to dashboard Cite

Saprolegniales is a complex and monophyletic order of oomycetes. Their members inhabit terrestrial, freshwater, and marine ecosystems and have a worldwide distribution. In these ecosystems, they are found as saprobes, parasites, or even pathogens of animals and plants of economic importance. In this study, a concatenate phylogeny of the partial LSU and complete ITS rDNA regions is presented, including isolates from Brazil and Argentina, which were sequenced after a detailed morphological analysis. Among the sequenced species, Achlya orion, Leptolegnia eccentrica, Phragmosporangium uniseriatum, and Pythiopsis irregularis are included for the first time in a phylogeny. Our results are in agreement with the recent informal proposals outlined in taxonomic overviews of the Oomycota of G.W. Beakes and collaborators, who placed the family Verrucalvaceae into the Saprolegniales and introduced the family Achlyaceae to group Achlya s.s., Brevilegnia, Dictyuchus, and Thraustotheca. These results also support the transference of Achlya androgyna to Newbya. Leptolegnia appears as paraphyletic, with the separation of L. eccentrica from the other species of this genus. In addition, Phragmosporangium, which is herein sequenced for the first time, clustered as sister to some species of Aphanomyces, including the type species, A. stellatus.

show abstract

“…and Pythium spp. have been performed from soil under native vegetation (Miranda & Pires‐Zonttarelli, 2012) as well as forestry (Poletto et al, 2007) and vegetable crops (Patekoski & Pires‐Zottarelli, 2010; Pinto et al, 2011); however, there is limited information about field crops (Rios & Rocha, 2018).…”

Section: Introductionmentioning

confidence: 99%

Damping‐off of soybean in southern Brazil can be associated with different species of Globisporangium spp. and Pythium spp.

Molin

Ribeiro²,

Matsumoto³

et al. 2021

Plant Pathology

View full text Add to dashboard Cite

Damping‐off of soybean is a common problem in some fields in southern Brazil. Frequently, Phytophthora sojae has been pointed out as the main causal agent. However, questions were raised as to whether other oomycetes could also be present. Hence, the objectives of this study were to isolate, identify, and determine the pathogenicity and aggressiveness of oomycetes isolated from soybean seedlings. Thirty‐three isolates were obtained from 13 fields. Isolates were identified based on morphology and molecular methods. Nine species were recovered: Pythium conidiophorum (n = 14, 42.4%), Globisporangium rostratifingens (n = 7, 21.2%), G. irregulare (n = 2, 6.1%), G. spinosum (n = 1, 3.0%), G. ultimum var. sporangiiferum (n = 2, 6.1%), Pythium acanthicum (n = 2, 6.1%), P. deliense (n = 1, 3.0%), P. inflatum (n = 1, 3.0%), and P. torulosum (n = 3, 9.1%). Pathogenicity and aggressiveness were determined with two soybean cultivars (DM57i52 and NEO530) in a seed rot assay and a root rot assay. All isolates were pathogenic to soybean with variable levels of aggressiveness in both assays. The range of seed disease severity index varied from 7.5 to 100 for DM57i52 and from 23.1 to 100 for NEO530. The mean root disease severity index of the soybean cultivars ranged from 29.4 to 92.8. This is the first official report of G. irregulare, G. rostratifingens, G. spinosum, G. ultimum var. sporangiiferum, P. acanthicum, P. conidiophorum, P. deliense, P. inflatum, and P. torulosum causing damping‐off of soybean in the state of Rio Grande do Sul in southern Brazil.

show abstract

Oomicetos do Parque Estadual da Serra da Cantareira, São Paulo, SP, Brasil

Cited by 9 publications

References 7 publications

Occurrence and distribution of the heterotrophic straminipiles from Brazilian Atlantic Rainforest areas

Occurrence and distribution of the heterotrophic straminipiles from Brazilian Atlantic Rainforest areas

New phylogenetic insights into Saprolegniales (Oomycota, Straminipila) based upon studies of specimens isolated from Brazil and Argentina

Damping‐off of soybean in southern Brazil can be associated with different species of Globisporangium spp. and Pythium spp.

Contact Info

Product

Resources

About