Septotinia and Septotis

Sutton, B. C.

doi:10.2307/3759436

Cited by 2 publications

(1 citation statement)

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“…은 수종으로서, 외국에서도 줄기에 만들어지는 작은 혹 (Bese-nyei와 Hevesi, 2003), 뿌리를 제외한 모든 기관을 감염하는 흰 가루병 (Mieslerová, 2020), 가지나 줄기를 말라 죽게하는 궤양 및 마름병 (Daughtrey와 van Broembsen, 2001;He 등, 2023;Hong 등, 2005;Orlikowski와 Ptaszek, 2008), 물관리가 불량한 곳에서 발생하는 뿌리썩음병 (Cacciola 등, 1994), 그리고 잎에 기형이나 생육부진을 초래하는 바이러스병 (Kaminska, 1985) 등 (Sutton, 1980;Waterman과 Cash, 1950;Zhu 등, 2019Zhu 등, , 2022 (Byun 등, 1967;Park, 1967). 그러나 Byun 등(1967)…”

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First Report on the Shoot Blight Disease of Gaenari (Forsythia koreana) Caused by Septotinia sp. in Korea

Woo,

Kim,

Lee

et al. 2023

Res. Plant Dis

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In early spring, water-soaked lesions appeared on the petals and leaves of gaenari (<i>Forsythia koreana</i>), and the tissues were necrotic and dry. Cankers appeared on the infected branches around late spring and the above part of a branch withered and died. However, it was very rare that the base of the cankered-branch died. The identical fungi were isolated from the lesions on various tissues, and they grew with white colonies on potato dextrose agar medium. The fungus grew most actively at 23oC and produced many sclerotia of various sizes. In a pathogenicity assay in which mycelial and sclerotial suspensions were inoculated on each organ of forsythia, it was found that the pathogen infects the flower only, but not the leaves or branches. Symptoms on the flowers spread to the next leaves and branches over time and the infected branches were eventually withered. To identify the isolates, DNA sequences of four phylogenetic markers including ITS, LSU, Tub2, and CAL were analyzed and all isolates were identified as a species in the genus Septotinia. This is not only the first report of gaenari (forsythia) shoot blight caused by the fungus Septotinia sp., but also the first report on the genus <i>Septotinia</i> as a plant pathogen in Korea.

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First Report on the Shoot Blight Disease of Gaenari (Forsythia koreana) Caused by Septotinia sp. in Korea

Woo,

Kim,

Lee

et al. 2023

Res. Plant Dis

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Pathogenicity and Biological Characteristics of Septotinia populiperda Causing Leaf Blotch of Willow

Zhu

Huang

et al. 2022

Plant Disease

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Salix babylonica is an important landscape tree in China and has been widely planted. In this study, the pathogenicity of Septotinia populiperda causing leaf blotch of Sa. babylonica to four willows (Sa. chaeomoloides, Sa. matsudana, Sa. matsudana f. tortuosa, and Sa. suchowensis) and Populus tomentosa (Chinese white poplar) was determined. Its sexual stage and biological characters were studied. Leaves from four willows and P. tomentosa were inoculated with mycelial plugs. Typical leaf blotches with sporodochia were produced on all inoculated leaves. Among the isolates studied, some developed conidia, but sclerotia were rare. The sclerotia developed apothecia after induction at 4°C for three months in an incubator and two more months outdoors from January to March. The biological characteristics of S. populiperda showed that mycelium grew better on complete medium (CM) than on potato dextrose agar (PDA), Czapek’s agar (CZA), and minimal medium (MM). For mycelial growth, the optimal carbon source was dextrose, and the optimal nitrogen source was yeast powder. Conidia germination rate was 59.4% at 24 hrs. The conidia germinated best in a 4% willow leaf extraction. The optimal temperature for conidia germination was 25°C, and the optimal pH was 4.

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Septotinia and Septotis

Cited by 2 publications

References 0 publications

First Report on the Shoot Blight Disease of Gaenari (Forsythia koreana) Caused by Septotinia sp. in Korea

First Report on the Shoot Blight Disease of Gaenari (Forsythia koreana) Caused by Septotinia sp. in Korea

Pathogenicity and Biological Characteristics of Septotinia populiperda Causing Leaf Blotch of Willow

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