Surviving freezing in plant tissues by oomycetous snow molds

Murakami, Ryo; Yajima, Yuka; Kida, Kenichi; Tokura, Katsuyuki; Tojo, Motoaki; Hashizume, Tamotsu

doi:10.1016/j.cryobiol.2015.01.007

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…However, Globisporangium spp. can be highly tolerant to freezing when they have infected plant tissues [28]. The present in vitro study confirmed consistent infection of wet living moss by all six Globisporangium spp.…”

Section: Isolation Patternsupporting

confidence: 82%

“…inhabiting Arctic regions are cold-adapted mesophiles rather than true psychrophiles (cold-loving), because they can grow at 20-25 • C. Mycelia of Globisporangium spp. are less freeze-resistant than those of fungi, even though a few isolates of G. polare are tolerant [28]. However, Globisporangium spp.…”

Section: Isolation Patternmentioning

confidence: 98%

“…Although these low-temperature Globisporangium spp. are less freeze-resistant than the low-temperature fungi [27], they can survive under freezing conditions by infecting living plant tissue [28]. However, there are few reports on their distribution and parasitism in natural polar ecosystems compared to those for fungi [4,22,29].…”

Section: Introductionmentioning

confidence: 99%

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Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018

et al. 2021

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Globisporangium spp. are soil-inhabiting oomycetes distributed worldwide, including in polar regions. Some species of the genus are known as important plant pathogens. This study aimed to clarify the species construction of Globisporangium spp. and their long-term isolation pattern in Sanionia moss in Ny-Ålesund, Spitsbergen Is., Norway. Globisporangium spp. were isolated at two-year intervals between 2006 and 2018 at a Sanionia moss colony, Ny-Ålesund, Spitsbergen Is., Norway. The isolates were obtained by using three agar media and were identified based on sequences of the rDNA-ITS region and cultural characteristics. Most of the Globisporangium isolates obtained during the survey were identified into six species. All six species were grown at 0 °C on an agar plate and used to infect Sanionia moss at 4 and/or 10 °C under an in vitro inoculation test. The total isolation frequency of Globisporangium gradually decreased throughout the survey period. The isolation frequency varied among the six species, and four of the species that showed a high frequency in 2006 were rarely isolated after 2016. The results suggested that Globisporangium inhabiting Sanionia moss in Ny-Ålesund has a unique composition of species and that most of the species reduced their population over the recent decade.

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Section: Isolation Patternsupporting

confidence: 82%

Section: Isolation Patternmentioning

confidence: 98%

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Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018

et al. 2021

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“…On the other hand, Samejima and Ichitani (1988) reported that oospores of P. zingiberum showed no gemination after 70 days buried in autoclaved soil with autoclaved cucumber stem segments, but the gemination ability of P. butleri had no change. Even in polar regions, mycelia of all tested Pythium in host plants survived after 3 freeze-thaw cycles (Murakami et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Common Strategies to Control <i>Pythium</i> Disease

Ogawa

Ochiai

et al. 2020

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Pythium species are soil-borne pathogens which can cause serious economic loss worldwide and threatening agricultural production. Traditional management methods like chemical fungicides are effective against Pythium spp. But as people pay more attention to human health and environmental issues, alternative methods that are ecofriendly and harmless to health are urgently needed. Currently, various approaches had been made including using natural extract, regulating planting conditions, using plant growthpromoting rhizobacteria and screening disease tolerance plants. Hereby, we review the recent achievements, particularly chemical and physical methods, biocontrol and host plant defense which can be used to control Pythium disease.

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A novel non-segmented double-stranded RNA virus from an Arctic isolate of Pythium polare

et al. 2018

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We investigated virus infection in the oomycete Pythium polare from the Arctic. From 39 isolates investigated, 14 contained virus-like double-stranded RNA (dsRNA). Next generation sequencing revealed that the P. polare isolate OPU1176 contained three different virus-like sequences. We determined the full-length genome sequence of one of them. The 5397 nt-length genome had two overlapped open reading frames (ORFs) consistent with a toti and toti-like viruses, that we named Pythium polare RNA virus 1 (PpRV1). The ORF2 encoded an RNA-dependent RNA polymerase (RdRp). The shifty heptamer motif and RNA pseudoknot were predicted near the stop codon of ORF1, implying that the RdRp could be translated as a fusion protein with the ORF1 protein. Phylogenetic analysis with deduced RdRp amino acid sequences indicated that oomycete virus PpRV1 was closely related to the unclassified arthropod toti-like viruses. The comparison of PpRV1-free and -infected lines suggested that PpRV1 infected in a symptomless manner.

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Surviving freezing in plant tissues by oomycetous snow molds

Cited by 4 publications

References 8 publications

Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018

Identification and Isolation Pattern of Globisporangium spp. from a Sanionia Moss Colony in Ny-Ålesund, Spitsbergen Is., Norway from 2006 to 2018

Common Strategies to Control <i>Pythium</i> Disease

A novel non-segmented double-stranded RNA virus from an Arctic isolate of Pythium polare

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