Morphological and phylogenetic analyses of three Phytopythium species (Peronosporales, Oomycota) from Brazil

Author(s)

de Jesus, Ana Lucia ^[1] ; Goncalves, Danilo Reis ^[1] ; Oliveira Rocha, Sarah Cristina ^[1] ; Marano, Agostina Virginia ^[1] ; Jeronimo, Gustavo Henrique ^[1] ; De Souza, Jose Ivanildo ^[1] ; Boro, Marcela Castilho ^[1] ; Amorim Pires-Zottarelli, Carmen Lidia ^[1]

Affiliation

^[1] Inst Bot, Nucleo Pesquisa Micol, Ave Miguel Stefano 3687, BR-04301902 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: CRYPTOGAMIE MYCOLOGIE; v. 37, n. 1, p. 117-128, MAR 2016.
• Web of Science Citations: 4

Abstract

We analyzed the morphology and phylogenetic placement of six isolates of Phytopythium belonging to P. helicoides, P. palingenes and P vexans that were isolated from water bodies and substrates used for hydroponically gown crops. The molecular data are from the partial large subunit and the complete internal transcribed regions of the ribosomal DNA. These three species are characterized by the presence of ovoid to globose zoosporangia with papillae, internal proliferation as in Phytophthora and mode of zoospore discharge as in Pythium. All isolates showed high morphological and phylogenetic similarity with members of the Clades II and III of Phytopythium. In this paper, Phytopythium palingenes is included for the first time in phylogenetic analyses and our ITS and LSU phylogenies indicated that Aquaperonospora taiwanensis is a synonym of Phytopythium helicoides. (AU)

• FAPESP's process: 14/03499-9 - Survey of Pythium sensu lato species in water used to supply hydroponic cultures in the metropolitan region of São Paulo
• Grantee: Danilo Reis Gonçalves
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 13/01409-0 - Diversity of Oomycota in mangrove swamps from Parque Estadual da Ilha do Cardoso (PEIC), Cananéia, São Paulo State, Brazil
• Grantee: Ana Lucia de Jesus
• Support Opportunities: Scholarships in Brazil - Master