Erysiphe catalpae and Erysiphe elevata in Europe

Ale-Agha, N.; Bolay, A.; Braun, Uwe; Feige, B.; Jage, Horst; Kummer, Volker; Lebeda, A.; Piątek, Marcin; Shin, Hyeon‐Dong; Zimmermannová-Pastirčáková, K.

doi:10.1007/s11557-006-0099-3

Cited by 31 publications

(16 citation statements)

References 4 publications

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“…(Braun, 1987;Sinclair et al, 1987), but our collection and positive identification was the first for North Carolina. In Europe, E. catalpae is the common Catalpa-specific PM (Ale-Agha et al, 2004;Braun, 1987 There were significant differences among taxa in susceptibility to PM as measured by AUDPC values in 2004 (F value = 183.4, P < 0.0001) and 2005 (F value = 51.6, P < 0.0001). Taxa with no PM infection (0 AUDPC) were not used in determining differences among means using Fisher protected LSD.…”

Section: Resultsmentioning

confidence: 98%

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Seasonal Change of Nitrate and Oxalate Concentration in Relation to the Growth Rate of Spinach Cultivars

Kaminishi¹,

Kita²

2006

HortSci

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Reduction of nitrate and oxalate content in spinach (Spinacia oleracea L.) has become the major concern in terms of their toxicity to human health. The primary objectives of this study were 1) to determine the seasonal change in nitrate and oxalate concentrations and 2) to elucidate the relationship between growth rate and concentration of nitrate and oxalate in spinach. In a replicated field experiment in Hiratsuka, Japan, the authors grew 182 cultivars of spinach over four growing seasons (winter, spring, summer, and fall) under the nitrogen application rate of 100 kg N·ha–1. The average number of days required for harvest was the shortest in summer (32.7days) and was longest in the winter (85.7 days). Mean nitrate concentration in spinach was significantly low in the winter (3797 mg·kg–1 fresh weight) compared with the other three seasons (4122–4328 mg·kg–1 fresh weight) in which no significant differences were found in mean nitrate levels. In contrast, oxalate concentrations showed a distinct seasonal variation, being the lowest in the fall (6149 mg·kg–1 fresh weight), followed by the summer (7525 mg·kg–1 fresh weight) and the spring (8903 mg·kg–1 fresh weight), and was the highest in the winter (10,929 mg·kg–1 fresh weight). Relative nitrate concentration showed a moderate negative correlation with relative days required for harvest (r = 0.411, P < 0.001), whereas relative oxalate concentration showed a strong positive correlation with relative days required for harvest (r = 0.566, P < 0.001). Accordingly, a moderate negative correlation (r = 0.325, P < 0.001) was detected between nitrate and oxalate concentrations. Moreover, fast-growing cultivars contained higher nitrate and lower oxalate, whereas slow-growing cultivars contained lower nitrate and higher oxalate. These results indicate that the growth rate primarily accounts for the nitrate and oxalate concentration in spinach, and nitrate and oxalate might play a counterrole to each other.

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Section: Resultsmentioning

confidence: 98%

“…Microsphaera elevata Burr.) (Ale-Agha et al, 2004;Braun, 1987;Braun et al, 2002;Farr et al, 1989). Of the two Catalpa-specific PMs, only E. elevata has been reported in North America, with E. catalpae currently restricted to Europe and Asia (Braun, 1987;Sinclair et al, 1987).…”

mentioning

confidence: 99%

Seasonal Change of Nitrate and Oxalate Concentration in Relation to the Growth Rate of Spinach Cultivars

Kaminishi¹,

Kita²

2006

HortSci

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“…Infections generally began on recently expanded leaves rather than immature growth. Levels of natural inoculum in the -Agha et al, 2004;Braun, 1987). Cleistothecial appendages were hyaline, 4 to 7• longer than the width of the cleistothecial body and dichotomously branched at the terminus, characteristic of Erysiphe elevata.…”

Section: Resultsmentioning

confidence: 99%

“…(Braun, 1987;Sinclair et al, 1987), but our collection and positive identification was the first for North Carolina. In Europe, E. catalpae is the common Catalpa-specific PM (Ale-Agha et al, 2004;Braun, 1987). However, E. elevata was recently reported in Hungary (Vajna et al, 2004) and is currently spreading in Europe (Ale-Agha et al, 2004; Cook et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Susceptibility of Catalpa, Chilopsis, and Hybrids to Powdery Mildew and Catalpa Sphinx Larvae

Olsen¹,

Ranney²,

Hodges³

2006

HortSci

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A diverse collection of germplasm representing 24 taxa from Catalpa sect. Catalpa Paclt and sect. Macrocatalpa Grisebach, Chilopsis D. Don, and ×Chitalpa Elias & Wisura were screened for susceptibility to powdery mildew (PM) incited by Erysiphe elevata (Burr.) U. Braun & S. Takam and feeding by catalpa sphinx larvae (CSL), Ceratomia catalpae (Boisduval). PM screening was conducted on plants grown in a lathhouse (50% shade) in 2004 and a gravel pad (100% sun) in 2005. The PM causal organism was identified as E. elevata both years. Disease incidence and severity were recorded at 2-week intervals for 6 weeks and used to calculate area under the disease progress curves (AUDPC) for each year. North American Catalpa in sect. Catalpa, Chilopsis, and ×Chitalpa taxa were all moderately to highly susceptible to PM. Chinese Catalpa in sect. Catalpa and West Indian species in sect. Macrocatalpa were resistant to PM. Hybrids between North American and Chinese Catalpa in sect. Catalpa varied in susceptibility, indicating transmission of partial resistance to PM. No differences in survival or growth were found in a no-choice feeding study with CSL reared on taxa from Chilopsis, ×Chitalpa, or either section of Catalpa. Future breeding of ×Chitalpa can use sources of PM resistance identified in this study, but a source of resistance to CSL was not found.

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“…Each chasmothecium contained four to seven asci, 49-61 × 28-43 μm, shortstalked or sessile, containing 3-5 ascospores (14-25 × 10-15 μm in length). Based on these characteristics, the fungus was identified as Erysiphe elevata (Ale- Agha et al 2004) and deposited in the herbarium of OMU (accession Samsun_02). To confirm the morphological identification, the internal transcribed spacer (ITS) region of rDNA of the representative isolate was amplified with primers ITS5 and P3 (Takamatsu et al 2009) and sequenced.…”

mentioning

confidence: 99%

First report of powdery mildew caused by Erysiphe elevata on Catalpa bignonioides in Turkey

et al. 2018

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Erysiphe catalpae and Erysiphe elevata in Europe

Cited by 31 publications

References 4 publications

Seasonal Change of Nitrate and Oxalate Concentration in Relation to the Growth Rate of Spinach Cultivars

Seasonal Change of Nitrate and Oxalate Concentration in Relation to the Growth Rate of Spinach Cultivars

Susceptibility of Catalpa, Chilopsis, and Hybrids to Powdery Mildew and Catalpa Sphinx Larvae

First report of powdery mildew caused by Erysiphe elevata on Catalpa bignonioides in Turkey

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