Evaluation of Resistance of Rose Cultivars and Wild Rose to Powdery Mildew and Black Spot.

Chatani, Kazuyuki; Toyoda, Hideyoshi; Ogata, Yoko; Koreeda, Kazuharu; Yoshida, Kenji; Matsuda, Yoshinori; Tsujino, Keiichiro; Ouchi, Seiji

doi:10.3186/jjphytopath.62.202

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Although Rosa multiflora Thunb (RSM) is a wild Rosa species highly resistant to PM, R. multiflora var. carnea Redouté and Thory (RSMC) is a variant of R. multiflora is highly susceptible to PM ( Wylie, 1954 ; Chatani et al, 1996 ; Leus, 2005 ; Zhang et al, 2009 ; Qiu et al, 2015 ). Fungal endophytic communities of Rosa are still poorly known.…”

Section: Introductionmentioning

confidence: 99%

Fungal Endophytic Communities of Two Wild Rosa Varieties With Different Powdery Mildew Susceptibilities

et al. 2018

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Powdery mildew (PM) is one of the most devastating and wide spread fungal diseases of rose, which seriously decrease its productivity and commercial value. In the present study, the endophytic fungal communities of two wild Rosa varieties (Rosa multiflora Thunb and R. multiflora var. carnea Redouté and Thory) with different PM susceptibilities were studied through Illumina MiSeq sequencer. A total of 14,000,424 raw reads were obtained from 60 samples, and 6,862,953 tags were produced after merging paired-end reads. 4462 distinct OTUs were generated at a 97% similarity level. It was found that only 34.2% of OTUs shared between two plant varieties. All of the OTUs were assigned into four fungal phyla, 17 classes, 43 orders, 86 families, 157 genera, and 208 species. Members of Ascomycota were found to be the most common fungal endophytes (EF) among all plant samples (93.7% relative abundance), followed by Basidiomycota (4.7% relative abundance), while Zygomycota and Glomeromycota were found to be rare and incidental. At each developmental stage of plants, the diversity and community structure of EF between two Rosa varieties showed significant differences. Both PCoA plots and PERMANOVA analyses indicated that developmental stage was the major factor contributing to the difference between the Rosa varieties (R2 = 0.348, p < 0.001). In addition, plant varieties and tissues were also important factors contributing to the difference (R2 = 0.031, p < 0.05; R2 = 0.029, p < 0.05). Moreover, Neofusicoccum, Rhodosporidium, and Podosphaera, etc., were found to be significantly different between two Rosa varieties, and some of the endophytes may play a role in PM resistance. These finding are encouraging to testify the potential use of these fungi in the biocontrol of PM in future studies.

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Section: Introductionmentioning

confidence: 99%

Fungal Endophytic Communities of Two Wild Rosa Varieties With Different Powdery Mildew Susceptibilities

et al. 2018

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“…In the north-central United States, the challenge of breeding for black spot resistance is compounded by the need for tolerance to the extremely low winter temperatures typical of the region. Although many cultivar evaluations for black spot resistance have been conducted in the southern and eastern United States (e.g., Hagan et al, 2005), northern Europe (e.g., Carlson-Nilsson and Davidson, 2006), and Japan (Chatani et al, 1996), only a few such trials have focused on cultivars adaptable to the north-central United States (Palmer and Salac, 1977;Watkins and Steinegger, 1986). Rose producers and gardeners in this region need clearer guidelines to select cultivars that not only resist black spot but also survive the climate.…”

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confidence: 99%

Evaluation of Griffith Buck Roses for Resistance to Black Spot

Mueller

Howell

Moran

2008

hortte

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Recently, roses (Rosa spp.) that require relatively little maintenance have gained in popularity in the United States. One group of these roses is the Griffith Buck roses, which were selected to survive the extremely cold winters of the north-central United States. Many of these roses were rated qualitatively as having disease resistance when they were released, but their resistance levels to black spot (Marssonina rosae) have not been quantified, compared with each other, or rated against other resistant or susceptible roses. In a field trial in Iowa in 2005 and 2006, 24 Griffith Buck roses that were originally described as disease resistant were compared with susceptible and resistant control cultivars for susceptibility to black spot. No fungicides were applied in either year. Plants were rated five times each year for black spot incidence, and also to assess overall plant appearance. Griffith Buck roses ‘Carefree Beauty’, ‘Aunt Honey’, ‘Honeysweet’, ‘Earthsong’, and ‘Pearlie Mae’ had significantly less black spot than many of the other cultivars. In addition, these cultivars also remained attractive and could be used in low-maintenance landscapes in the north-central United States, even under moderate black spot pressure.

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“…Moneymaker) and primary leaves of 10-day-old seedlings of barley were inoculated with newly produced conidia of O. neolycopersici KTP-01 (Kashimoto et al 2003) or B. graminis f. sp. hordei race 1 (R1) (Toyoda et al 1978) as described previously (Chatani et al 1996). Conidia were dusted onto leaves at a density of 300 spores/ cm 2 , and inoculated plants were incubated for 24-72 h in a growth chamber at 25° Ϯ 1°C (for KTP-01) or at 20° Ϯ 1°C (for R1) under continuous illumination of a fluorescent lamp (3500 lx).…”

Section: Hordeimentioning

confidence: 99%

Cytological events in tomato leaves inoculated with conidia of Blumeria graminis f. sp. hordei and Oidium neolycopersici KTP-01

Sameshima

Kashimoto²,

Kida

et al. 2004

Journal of General Plant Pathology

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Leaves of tomato and barley were inoculated with conidia of Blumeria graminis f. sp. hordei race 1 (R1) or Oidium neolycopersici (KTP-01) to observe cytological responses in search of resistance to powdery mildew. Both conidia formed appressoria at similar rates on tomato or barley leaves, indicating that no resistance was expressed during the prepenetration stage of these fungi. On R1-inoculated tomato leaves, appressoria penetrated the papillae, but subsequent haustorium formation was inhibited by hypersensitive necrosis in the invaded epidermal cells. On the other hand, KTP-01 (pathogenic to tomato leaves) successfully developed functional haustoria in epidermal cells to elongate secondary hyphae, although the hyphal elongation from some conidia was later suppressed by delayed hypersensitive necrosis in some haustoriumharboring epidermal cells. Thus, the present study indicated that the resistance of tomato to powdery mildew fungi was associated with a hypersensitive response in invaded epidermal cells but not the prevention of fungal penetration through host papilla.

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Evaluation of Resistance of Rose Cultivars and Wild Rose to Powdery Mildew and Black Spot.

Abstract: In an attempt to

Cited by 5 publications

References 6 publications

Fungal Endophytic Communities of Two Wild Rosa Varieties With Different Powdery Mildew Susceptibilities

Fungal Endophytic Communities of Two Wild Rosa Varieties With Different Powdery Mildew Susceptibilities

Evaluation of Griffith Buck Roses for Resistance to Black Spot

Cytological events in tomato leaves inoculated with conidia of Blumeria graminis f. sp. hordei and Oidium neolycopersici KTP-01

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