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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Plant Pathology Journal
Journal Basic Information
Journal DOI :
Korean Society of Plant Pathology
Editor in Chief :
Volume & Issues
Volume 23, Issue 4 - Dec 2007
Volume 23, Issue 3 - Sep 2007
Volume 23, Issue 2 - Jun 2007
Volume 23, Issue 1 - Mar 2007
Selecting the target year
Establishment of the Chickpea Wilt Pathogen Fusarium oxysporum f. sp. ciceris in the Soil through Seed Transmission
Pande S. ; Rao, J. Narayana ; Sharma M. ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 3~6
DOI : 10.5423/PPJ.2007.23.1.003
Chickpea wilt caused by Fusarium oxysporum f. sp. ciceris(FOC) is the most destructive disease in India. It is seed-borne as well as soil-borne pathogen. The role of seed-borne FOC in introducing and establishing wilt in FOC free soils is unknown. Using seeds of FOC infected chickpea cultivar K 850, we provided an evidence of establishing wilt disease in the FOC free soils within three crop cycles or seasons. In the first cycle, typical wilt symptoms were observed in 24 pots in 41 days after sowing. These 24 pots were used for second and third cycles without changing the soil. These 24 pots were sown with seeds collected from healthy plants of a susceptible cultivar JG 62, one seed per pot and development of wilt symptom was recorded. Wilt symptoms appeared in all the pots 26 days after sowing in second cycle and in 16 days after sowing in third cycle. On selective medium, all of the wilted plants yielded FOC in all the three cycles indicating that the mortality was due to wilt. FOC propagules on selective medium were 172, 1197, and 2280
soil at the end of the first, second, and third cycles, respectively. These studies indicated that Fusarium wilt of chickpea is seed-borne and seeds harvested from wilted plants when mixed with healthy seeds can carry the wilt fungus to new areas and can establish the disease in the soil to economic threshold levels within three seasons.
First Description of Coleosporium plectranthi Causing Perilla Rust in Korea
Yun, Hye-Young ; Kim, Young-Ho ; Hong, Soon-Gyu ; Lee, Kyung-Joon ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 7~12
DOI : 10.5423/PPJ.2007.23.1.007
Perilla rust is a damaging disease in perilla cultivation in Korea. Its causal agent was identified as Coleosporium plectranthi based on descriptions of morphological characteristics of spores and spore-producing fruiting structures(in uredinial and telial stages from perilla and in aecial stage from the alternate host pine) collected in 15 locations in Korea during the disease survey from 2004 to 2006. These characteristics were yellow or orange uredinium; globose or ellipsoid urediniospore of
in size; verruca of
; orange telium; one-celled, oblong ellipsoid teliospore of
with one-layered crusts or four-celled(when mature), internal basidium of
; ellipsoid to globoid basidiospore of
; type 2 spermogonium; yellow, broadly ellipsoid peridial cell of
; and broadly ellipsoidal or subglobose aeciospore of
. Phylogenetic analysis of 28S rDNA sequences revealed the closest relatedness to those of the genus Coleosporium, a monophyletic group distinguished from other rust fungi and divided into two main lineages, one of which was C. plectranthi grouped with high bootstrap value(96%). In pathogenicity test, both aeciospores and urediniospores caused rust development on perilla leaves. This is the first description of C. plectranthi causing perilla rust with the first findings of its telial stage on perilla and the first rust disease on the aecial host in Pinus densiflora. These aspects would provide basic information for the development of control measures of the disease.
Genetic Diversity of Sweet potato feathery mottle virus from Sweet Potatoes in Korea
Kwak, Hae-Ryun ; Kim, Mi-Kyeong ; Jung, Mi-Nam ; Lee, Su-Heon ; Park, Jin-Woo ; Kim, Kook-Hyung ; Ko, Sug-Ju ; Choi, Hong-Soo ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 13~21
DOI : 10.5423/PPJ.2007.23.1.013
Sweet potato feathery mottle virus(SPFMV) is one of the most prevalent viruses infecting sweet potatoes and occurs widely in sweet potato cultivating areas in Korea. To assess their genetic variation, a total of 28 samples infected with SPFMV were subjected to restriction fragment length polymorphism(RFLP) analysis using DNAs amplified by RT-PCR with specific primer sets corresponding to the coat protein(CP) region of the virus. The similarity matrix by UPGMA procedure indicated that 28 samples infected with SPFMV were classified into three groups based on the number and size of DNA fragments by digestion of CP-encoding regions with 7 enzymes including SalI, AluI, EcoRI, HindIII, FokI, Sau3AI, and DraI bands. Four primer combinations out of 5 designed sets were able to differentiate SPFMV and sweet potato virus G infection, suggesting that these specific primers could be used to differentiate inter-groups of SPFMV. Sequence analysis of the CP genes of 17 SPFMV samples were 97-99% and 91-93% identical at the intra-group and inter-groups of SPFMV, respectively. The N-terminal region of the CP is highly variable and examination of the multiple alignments of amino acid sequences revealed two residues(residues 31 and 32) that were consistently different between SPFMV-O and SPFMV-RC.
Induced Systemic Resistance by Bacillus vallismortis EXTN-1 Suppressed Bacterial Wilt in Tomato Caused by Ralstonia solanacearum
Park, Kyung-Seok ; Paul, Diby ; Kim, Yong-Ki ; Nam, Ki-Woong ; Lee, Young-Kee ; Choi, Hyo-Won ; Lee, Sang-Yeob ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 22~25
DOI : 10.5423/PPJ.2007.23.1.022
Biocontrol activity of five strains of selected rhizo-bacteria were tested in tomato against bacterial wilt caused by Ralstonia solanacearum. After root bacterization the plants were grown in a perlite-hydroponic system. Upon challenge inoculation with the pathogen, all of the rhizobacterial strains efficiently suppressed the bacterial wilt in tomato in various rates, at maximum by the strain, Bacillus vallismortis strain EXTN-1. While the percent of infected plants in the non-bacterized control plants were 95%, it was only 65% in plants pre-treated with EXTN-1. It was also demonstrated that the movement of R. solanacearum within the stem was significantly hampered when the plants were root bacterized. As EXTN-1 has no antagonistic properties against R. solanacearum, the bacterial wilt was probably suppressed by a mechanism other than antibiosis. Previously, the strain had been proven to produce an efficient elicitor for inducing systemic resistance in many crops. As the present study confirmed that EXTN-1 has the ability for reducing the pathogen spread in tomato, the strain could be effectively used as a potential biocontrol agent against bacterial wilt.
A New Formulation System for Slow Releasing of Phosphorous Acid in Soil for Controlling Phytophthora Diseases
Park, Hae-Jun ; Kim, Sung-Ho ; Jee, Hyeong-Jin ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 26~30
DOI : 10.5423/PPJ.2007.23.1.026
Phosphorous acid is known to effectively control various Oomycetes diseases. The phosphoric acid moves upward and downward through the xylem and phloem in plants. The sustainable forms of the slow releasing chemical in rhizosphere would be ideal to be up-taken by plants. Therefore, we developed a new system for phosphorous acid formulation using a carrier coated with polysaccharides. When the product was applied in rhizosphere, the adequate amount of phosphorous acid was consistently released up to 4 weeks in rhizosphere soils. While soil drenching with phosphorous acid at 1,000
and metalaxyl at 150
were not effective to control pepper Phytophthora blight for 4 weeks, direct application of our formulation product around basal stem of pepper plants resulted in excellent disease control effect against Phytophthora blight over 4 weeks. The application of 4 g of our product per plant was optimum to control the disease, and 8 g product/plant did not cause phytotoxicity. Based on the results, we conclude that the applications of the formulation product once or twice during cropping season can control Phytophthora diseases on various crops.
Phytophthora Rot of Broad Bean(Vicia faba) Caused by Phytophthora nicotianae in Korea
Kwon, Jin-Hyeuk ; Jee, Hyeong-Jin ; Shen, Shun-Shan ; Chae, Yun-Seok ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 31~33
DOI : 10.5423/PPJ.2007.23.1.031
Phytophthora rot on broad bean(Vicia faba) occurred in the experimental field at Gyeongsangnam-do Agricultural Research and Extension Services from 2004 to 2006. The fungus isolated from the diseased plants grew well on potato dextrose agar and showed an arachnoid or rosaceous colony pattern. Sporangia were conspicuously papillated, noncaducous, ovoid to globose, and
in size. Oogonia and oospores were spherical and measured as 20-32
in size, respectively. Oospores were relatively small and aplerotic. Antheridia were amphigynous, spherical, and unicellula. Chlamydospores were globose and 18-40
in size. Optimum temperature for growth was about
on potato dextrose agar. The disease occurred in all parts of the plant including roots, stems, leaves and pods in the field. The symptoms similar to those of naturally infected plants were induced by artificial inoculation and the pathogen was re-isolated from the plant. On the basis of mycological and pathological characteristics, the causal pathogen of broad bean rot was identified as Phytophthora nicotianae. This is the first report of Phytophthora rot of broad bean caused by P. nicotianae in Korea.
Tobacco mosaic virus Detected in Vegetatively Propagated Petunia Hybrids 'Surfinia'
Chung, Bong-Nam ; Kim, Jeong-Soo ; Cho, Jeom-Deog ; Cheong, Seung-Ryong ; Jeong, Myeong-Il ;
The Plant Pathology Journal, volume 23, issue 1, 2007, Pages 34~36
DOI : 10.5423/PPJ.2007.23.1.034
Introduction of vegetatively propagated Petunia hybrids since 1992 led to increasing virus infections of propagation material. Petunia hybrid 'Surfinia' cultivated for pot-plant showed yellowing symptom along with stunt. Flowers were smaller in size and showed color-break symptom. Tobacco mosaic virus(TMV-pet) was isolated from the diseased petunia. Healthy petunia plants inoculated with TMV-pet induced mottle on leaves and color-break on flowers, and plants were stunted. Nucleotide sequences of coat protein gene amplified from RNA prepared from Nicotiana tabacum cv. Samsun infected with TMV-pet were determined(GenBank accession no. DQ981481). It showed 99.0% nucleotide sequence homology with TMV-potato3-2(GenBank accession no. AF318215) isolated from potato showing yellow mosaic and stunt symptom, and with a TMV Korean strain(GenBank accession no. X68110). This is the first reported observation of TMV from vegetatively propagated petunia in Korea.