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Fungal Endophytes in Roots of Aralia Species and Their Antifungal Activity
Narayan Chandra Paul,김원기,우성균,박명수,유승헌 한국식물병리학회 2007 Plant Pathology Journal Vol.23 No.4
Endophytic fungi were isolated from surface sterilized root tissues of Aralia elata and Aralia continentalis, collected from farmer’s field in Chungnam province, Republic of Korea, in 2005. Based on ITS sequence analysis, 24 fungal genera were characterized from 359 isolates, belonging to 22 Ascomycota, 1 Glomeromycota and 1 Oomycota. Strumella, Rhizopycnis and Entrophospora in A. elata and Rhizopycnis and Leptosphaeria in A. continentalis were the most abundant taxa. Out of 24 genera, Entrophospora, Leptodontidium, Neoplaconema, Paraconiothyrium, Rhizopycnis, Strumella and Tumularia were new to Korea. A total of 110 isolates were tested for antifungal activities against six plant pathogenic fungi. Out of these, 39 isolates showed antifungal activity against at least one plant pathogenic fungi. Four isolates of Pyrenochaeta, 1 isolate of Entrophospora and 1 unidentified fungus strongly inhibited the growth of six plant pathogenic fungi.
Paul, Narayan Chandra,Lee, Hyang Burm,Lee, Ji Hye,Shin, Kyu Seop,Ryu, Tae Hee,Kwon, Hye Ri,Kim, Yeong Kuk,Youn, Young Nam,Yu, Seung Hun MDPI 2014 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.15 No.9
<P>Chinese boxthorn or matrimony vine (<I>Lycium chinense</I> Mill) is found primarily in southeastern Europe and Asia, including Korea. The dried ripe fruits are commonly used as oriental medicinal purposes. Endophytic fungi were isolated from surface sterilized tissues and fruits of the medicinal plant in 2013 to identify the new or unreported species in Korea. Among 14 isolates, 10 morphospecies were selected for molecular identification with the <I>internal transcribed spacer</I> (<I>ITS</I>) gene. Phylogenetic analysis revealed that all isolates belonged to Ascomycota including the genera <I>Acremonium</I>, <I>Colletotrichum</I>, <I>Cochliobolus</I>, <I>Fusarium</I>, <I>Hypocrea</I> and <I>Nemania</I>. Two <I>Colletotrichum</I> species were identified at the species level, using three genes including <I>internal transcribed spacer</I> (<I>ITS</I>), glycerol-3-phosphate dehydrogenase (GAPDH) and Actin (ACT) for PCR and molecular data analysis along with morphological observations. The fungal isolates, CNU122031 and CNU122032 were identified as <I>Colletotrichum fructicola</I> and <I>C. brevisporum</I>, respectively. Morphological observations also well supported the molecular identification. <I>C. brevisporum</I> is represented unrecorded species in Korea and <I>C. fructicola</I> is the first record from the host plant.</P>
Narayan Chandra Paul,유승헌,Jian Xin Deng,상현규,최영필 한국식물병리학회 2012 Plant Pathology Journal Vol.28 No.1
This study investigated the distribution of endophytic fungi obtained from the surface sterilized tissues of leaves, stems and roots of chili pepper (Capsicum annuum L.) plants in seedling, flowering and fruiting stages in Korea and their antifungal activity. A total of 481isolates were recovered and were identified using molecular techniques. Based on rDNA ITS gene sequence and phylogenetic analysis, 21 fungal genera were characterized, belonging to 16 Ascomycota and 5Basidiomycota. Penicillium in seedling stage, Fusarium in flowering stage, Colletotrichum followed by Fusarium,Alternaria and Xylaria in fruiting stage was predominant and Alternaria, Cladosporium and Fusarium were common in all growth stages. Among 481 endophytes 90 phenotypes were evaluated for the antimicrobial activity against three major pathogens (Phytophthora capsici, Colletotrichum acutatum and Fusarium oxysporum)of chili pepper. Among them 16 isolates inhibited the growth of at least one test microorganisms. Three strains showed a broad spectrum antifungal activity and displayed strong inhibition against chili pepper pathogenic fungi.
( Narayan Chandra Paul ),( Hye Yeon Mun ),( Hye Won Lee ),( Seung Hun Yu ),( Hyang Burm Lee ) 한국균학회 2014 Mycobiology Vol.42 No.3
A fungal isolate EML-NCP01 was recovered from agricultural soil in Ulleung Island, Korea. Phylogenetic analysis of internal transcribed spacer and β-tubulin genes identified the isolate as the Penicillium species P. raphiae. Morphologically, theEML-NCP01 isolate was identical to the previous description of P. raphiae. The species presented here has not been reported in Korea.
( Narayan Chandra Paul ),( Eom-ji Hwang ),( Sang-sik Nam ),( Hyeong-un Lee ),( Joon-seol Lee ),( Gyeong-dan Yu ),( Yong-gu Kang ),( Kyeong-bo Lee ),( San Go ),( Jung-wook Yang ) 한국균학회 2017 Mycobiology Vol.45 No.3
In this study, we aimed to characterize fungal samples from necrotic lesions on collar regions observed in different sweetpotato growing regions during 2015 and 2016 in Korea. Sclerotia appeared on the root zone soil surface, and white dense mycelia were observed. At the later stages of infection, mother roots quickly rotted, and large areas of the plants were destroyed. The disease occurrence was monitored at 45 and 84 farms, and 11.8% and 6.8% of the land areas were found to be infected in 2015 and 2016, respectively. Fungi were isolated from disease samples, and 36 strains were preserved. Based on the cultural and morphological characteristics of colonies, the isolates resembled the reference strain of Sclerotium rolfsii. Representative strains were identified as S. rolfsii (teleomorph: Athelia rolfsii) based on phylogenetic analysis of the internal transcribed spacer and large subunit genes along with morphological observations. To test the pathogenicity, sweetpotato storage roots were inoculated with different S. rolfsii strains. `Yulmi` variety displayed the highest disease incidence, whereas `Pungwonmi` resulted in the least. These findings suggested that morphological characteristics and molecular phylogenetic analysis were useful for identification of S. rolfsii.