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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Plant Pathology Journal
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Journal DOI :
Korean Society of Plant Pathology
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Volume & Issues
Volume 25, Issue 4 - Dec 2009
Volume 25, Issue 3 - Sep 2009
Volume 25, Issue 2 - Jun 2009
Volume 25, Issue 1 - Mar 2009
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Determination of Genetic Divergence Based on DNA Markers Amongst Monosporidial Strains Derived from Fungal Isolates of Karnal Bunt of Wheat
Seneviratne, J.M. ; Gupta, Atul K. ; Pandey, Dinesh ; Sharma, Indu ; Kumar, Anil ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 303~316
DOI : 10.5423/PPJ.2009.25.4.303
Genetic variation among the base isolates and monosporidial strains derived from these isolates of Tilletia indica- the causal agent of Karnal bunt (KB) in wheat, was analyzed by morphological, growth behaviors and RAPD-ISSR based molecular polymorphism. Genetic make up of fungal cultures vary among each other. The magnitude of variation in KBPN group is less (narrow genetic base) when compared to the other groups KB3, KB9 and JK (broad genetic base) reflecting that variability is a genetically governed process. The generation of new variation with different growth characteristics is not a generalized feature and is totally dependant on the original genetic make-up of the base isolate generating new monosporidial strains. Thus, it can be concluded that monosporidial strains derived from mono-teliosporic isolate, consists of genetically heterogeneous population. The morphological and genetic variability further suggests that the variation in T. indica strains is predominantly derived through the genetic rearrangements through para sexual means.
Baseline Sensitivity to Mandipropamid Among Isolates of Phytophthora capsici Causing Phytophthora Blight on Pepper
Jang, Ho-Sun ; Lee, Soo-Min ; Kim, Sun-Bo ; Kim, Joo-Hyung ; Knight, Susan ; Park, Kwee-Doo ; McKenzie, Duncan ; Kim, Heung-Tae ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 317~321
DOI : 10.5423/PPJ.2009.25.4.317
Sensitivity to the new carboxylic acid amide fungicide, mandipropamid, of Phytophthora capsici causing pepper Phytophthora blight was determined on 187 isolates collected in Korea over 3 years, from 2005 to 2007. All isolates were sensitive to mandipropamid, with
values for growth of mycelia ranging from 0.001 to
. Among the isolates, 147 (79.0%) isolates were sensitive to metalaxyl, whereas others were resistant to this fungicide. Mandipropamid had the same effect on mycelium growth of both metalaxyl-sensitive and metalaxyl-resistant isolates, indicating an absence of cross-resistance between these two fungicides. Comparison of the sensitivities of P. capsici isolates showed a positive correlation between sensitivity to mandipropamid and dimethomorph (
=0.8533). The results of this study indicate that there is no evidence for development of resistance to mandipropamid in this population of P. capsici isolates collected in Korea.
Molecular Analysis of Botrytis cinerea Causing Ginseng Grey Mold Resistant to Carbendazim and the Mixture of Carbendazin Plus Diethofencarb
Kim, Joo-Hyung ; Min, Ji-Young ; Bae, Young-Seok ; Kim, Heung-Tae ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 322~327
DOI : 10.5423/PPJ.2009.25.4.322
A total of 23 isolates of Botrytis cinerea causing the grey mold were collected from infected ginseng in several fields of Korea. The sensitivity to carbendazim and the mixture of carbendazim plus diethofencarb was determined through a mycelial inhibition test on PDA amended with or without fungicides. B. cinerea isolates were classified as 3 phenotypes, which were the first phenotype resistant to both of carbendazim and the mixture (
), the second one resistant to carbendazim and sensitive to the mixture (
), and the last one sensitive to both of them (
). Carbendazim resistance correlated with a single mutation
-tubulin gene of B. cinerea amplified with primer pair tubkjhL and tubkjhR causing a change of glutamate to alanine at amino acid position 198. Furthermore, the substitution of valine for glutamate led the resistance to carbendazim and the mixture at the same position of amino acid. PCR-restriction fragment length polymorphism (PCR-RFLP) analysis using the restriction endonuclease, Tsp451 and BstUI allowed differentiation of the PCR fragment of
-tubulin gene of
isolates from that of
isolates. This method will aid in a fast detection of resistance of carbendazim and the mixture of carbendazim plus diethofencarb in B. cinerea in ginseng field.
Use of Serological-Based Assay for the Detection of Pepper yellow leaf curl Indonesia virus
Hidayat, Sri Hendrastuti ; Haryadi, Dedek ; Nurhayati, Endang ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 328~332
DOI : 10.5423/PPJ.2009.25.4.328
Diseases caused by Pepper yellow leaf curl virus infection is considered to be emerging plant diseases in Indonesia in the last five years. One key factor for disease management is the availability of accurate detection of the virus in plants. Polyclonal antibody for Pepper yellow leaf curl Indonesia virus-Bogor (PYLCIV-Bgr) was produced for detection of the virus using I-ELISA and DIBA methods. The antibody was able to detect PYLCIV-Bgr from infected plants up to dilution 1/16,384 and cross reaction was not observed with Cucumber mosaic virus (CMV), Tobacco mosaic virus (TMV), and Chilli veinal mottle virus (ChiVMV). Positive reaction was readily detected in membrane containing Begomovirus samples from Yogyakarta (Kaliurang and Kulonprogo) and West Java (Bogor and Segunung). Infection of PYLCIV-Bgr in chillipepper, tomato, and Ageratum conyzoides was also confirmed using polyclonal antibody for PYLCIV-Bgr in DIBA. Polyclonal antibody for PYLCIV-Bgr is suggested to be included in disease management approach due to its good detection level.
Root Colonization and ISR-mediated Anthracnose Disease Control in Cucumber by Strain Enterobacter asburiae B1
Bharathkumar, S. ; Park, Jin-Woo ; Han, Ji-Hee ; Park, Kyung-Seok ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 333~343
DOI : 10.5423/PPJ.2009.25.4.333
Here, we show that an endophytic bacterial strain, Enterobacter asburiae B1 exhibits the ability to elicit ISR in cucumber, tobacco and Arabidopsis thaliana. This indicates that strain B1 has a widespread ability to elicit ISR on various host plants. In this study, E. asburiae strain B1 did not show antifungal activity against tested major fungal pathogens, Colletotrichum orbiculare, Botrytis cinerea, Phytophthora capsici, Rhizoctonia solani, and Fusarium oxysporum. Moreover, the siderophore production by E. asburiae strain B1 was observed under in vitro condition. In greenhouse experiments, the root treatment of strain B1 significantly reduced disease severity of cucumber anthracnose caused by fungal pathogen C. orbiculare compared to nontreated control plants. By root treatment of strain B1 more than 50% disease control against anthracnose on cucumber was observed in all greenhouse experiments. Simultaneously, under the greenhouse condition, the soil drench of strain B1 and a chemical inducer benzothiadiazole (BTH) to tobacco plants induced GUS activity which is linked with activation of PR promoter gene. Furthermore, in Arabidopsis thaliana plants the soil drench of strain B1 induced the defense gene expression of PR1 and PDF1.2 related to salicylic acid and jasmonic acid/ethylene signaling pathways, respectively. In this study, for the main focus on root colonization by strain B1 associated with defense responses, bacterial cells of strain B1 was tagged with the gfp gene encoding the green fluorescent protein in order to determine the colonization pattern of strain B1 in cucumber. The gfp-tagged B1 cells were found on root surface and internal colonization in root, stem, and leaf. In addition to this, the scanning electron microscopy observation showed that E. asburiae strain B1 was able to colonized cucumber root surface.
Characterization of a Chitinase Gene Exhibiting Antifungal Activity from a Biocontrol Bacterium Bacillus licheniformis N1
Lee, Kwang-Youll ; Heo, Kwang-Ryool ; Choi, Ki-Hyuck ; Kong, Hyun-Gi ; Nam, Jae-Sung ; Yi, Young-Byung ; Park, Seung-Hwan ; Lee, Seon-Woo ; Moon, Byung-Ju ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 344~351
DOI : 10.5423/PPJ.2009.25.4.344
A biocontrol bacterium Bacillus licheniformis N1 grown in nutrient broth showed no chitinolytic activity, while its genome contains a gene which encodes a chitinase. The gene for chitinase from B. licheniformis N1 was amplified by PCR and the deduced amino acid sequence analysis revealed that the chitinase exhibited over 95% identity with chitinases from other B. licheniformis strains. Escherichia coli cells carrying the recombinant plasmid displayed chitinase activity as revealed by the formation of a clear zone on chitin containing media, indicating that the gene could be expressed in E. coli cells. Chitinase gene expression in B. licheniformis N1 was not detected by RT-PCR analysis. The protein was over-expressed in E. coli BL21 (DE3) as a glutathione S-transferase fusion protein. The protein could also be produced in B. subtilis 168 strain carrying the chitinase gene of N1 strain. The crude protein extract from E. coli BL21 carrying GST fusion protein or culture supernatant of B. subtilis carrying the chitinase gene exhibited enzyme activity by hydrolyzing chitin analogs, 4-methylumbelliferyl-
-D-N,N'-diacetylchitobioside and 4-methylumbelliferyl-
-D-N,N',N"-triacetylchitotrioside. These results indicated that even though the chitinase gene is not expressed in the N1 strain, the coding region is functional and encodes an active chitinase enzyme. Furthermore, B. subtilis 168 transformants expressing the chitinase gene exhibited antifungal activity against Fulvia fulva by suppressing spore germination. Our results suggest that the proper engineering of the expression of the indigenous chitinase gene, which will lead to its expression in the biocontrol strain B. licheniformis N1, may further enhance its biocontrol activity.
Direct Antimicrobial Activity and Induction of Systemic Resistance in Potato Plants Against Bacterial Wilt Disease by Plant Extracts
Hassan, M.A.E. ; Bereika, M.F.F. ; Abo-Elnaga, H.I.G. ; Sallam, M.A.A. ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 352~360
DOI : 10.5423/PPJ.2009.25.4.352
The potential of three plants extracts, to protect potato plants against bacterial wilt caused by Ralstonia solanacearum was determined under greenhouse and field conditions. All soil drenching treatments of aqueous plant extracts of Hibsicus sabdariffa, Punica granatum and Eucalyptus globulus significantly reduced the disease severity compared with inoculated control. Although the applications of all three plant extracts resulted in similar reductions of disease severity in field up 63.23 to 68.39%, treatment of E. globulus leaf extract was found greater in restricting the symptom development than other the two plant extracts in the greenhouse. More than 94% reduction in the bacterial wilt symptom was observed in potato plants. All tested plant extracts were effective in inhibiting the growth of bacterial pathogen, not only in vitro, but also in stem of potato plants as compared with the inoculated control Potato plants treated with extract of H. sabdariffa reduced bacterial growth more effectively than treatment with P. granatum and E. globulus. Activity of defence-related enzymes, including peroxidase, polyphenoloxidase and phenylalanine ammonia lyase, were significantly increased in plants treated with the plant extracts compared to the control during the experimental period. In general, the higher enzymes activities were determined in both inoculated and non-inoculated treated potato plants after 8 days from plant extracts treatment. These results suggested that these plant extracts may be play an important role in controlling the potato bacterial wilt disease, through they have antimicrobial activity and induction of systemic resistance in potato plants.
Enhancing the Efficacy of Burkholderia cepacia B23 with Calcium Chloride and Chitosan to Control Anthracnose of Papaya During Storage
Rahman, M.A. ; Mahmud, T.M.M. ; Kadir, J. ; Rahman, R. Abdul ; Begum, M.M. ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 361~368
DOI : 10.5423/PPJ.2009.25.4.361
The efficacy of the combination of Burkholderia cepacia B23 with 0.75% chitosan and 3% calcium chloride (
) as a biocontrol treatment of anthracnose disease of papaya caused by Colletotrichum gloeosporioides, was evaluated during storage. The growth of B. cepacia B23 in papaya wounds and on fruit surfaces was not affected in presence of chitosan and
or combination throughout the storage period. The combination of B. cepacia B23 with chitosan-
was more effective in controlling the disease than either B. cepacia B23 or chitosan or other combination treatments both in inoculated and naturally infected fruits. Combining B. cepacia B23 with chitosan-
gave the complete control of anthracnose infection in artificially inoculated fruits stored at
and 95% RH for 18 days, which was similar to that obtained with fungicide
. Moreover, this combination offered a greater control by reducing 99% disease severity in naturally infected fruits at the end of 14 days storage at
and 95% RH and six days post ripening at
, which was superior to that found with
or other treatments tested. Thus, postharvest application of B. cepacia B23 with chitosan-
as enhancers represents a promising alternative to synthetic fungicides for the control of anthracnose in papaya during storage.
Antiviral Effects of the Culture Filtrate from Serratia marcescens Gsm01, against Cucumber mosaic virus (CMV)
Thapa, Shree Prasad ; Lee, Hye-Jin ; Park, Duck-Hwan ; Kim, Sam-Kyu ; Cho, Jun-Mo ; Cho, Sae-Youll ; Hur, Jang-Hyun ; Lim, Chun-Keun ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 369~375
DOI : 10.5423/PPJ.2009.25.4.369
The potential antiviral effects of the culture filtrates (CF) from Serratia marcescens strain Gsm01 against yellow strain of Cucumber mosaic virus (CMV-Y) were investigated. The culture filtrate of S. marcescens strain Gsm01 applied on Chenopodium amaranticolor showed high inhibitory activity, likewise no necrosis appeared when applied on the tobacco plants 2 days before CMV-Y inoculation. When plants were challenge inoculated with CMV-Y for eighteen days, the disease incidence in plants with culture filtrate of S. marcescens Gsm01 did not exceed 59%, whereas 100% of control plants were severely infected. The results of double antibody sandwich-enzyme linked immunosorbent assay (DAS-ELISA), reverse transcriptase polymerase chain reaction (RT-PCR), dot blotting, and western blotting showed that culture filtrate treatment highly affected the accumulation of CMV-Y or its CP protein gene in the treated plant leaves. It was also observed that the culture filtrate had no RNase activity on genomic RNAs of CMV-Y, suggesting that culture filtrate may not contain ribosome inactivating proteins (RIPs) or proteins with RNase activity. These data shows that culture filtrate of S. marcescens strain Gsm01 seems to be a promising source of antiviral substance for the practical use.
Effects of Colloidal Silver Nanoparticles on Sclerotium-Forming Phytopathogenic Fungi
Min, Ji-Seon ; Kim, Kyoung-Su ; Kim, Sang-Woo ; Jung, Jin-Hee ; Lamsal, Kabir ; Kim, Seung-Bin ; Jung, Moo-Young ; Lee, Youn-Su ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 376~380
DOI : 10.5423/PPJ.2009.25.4.376
Effects of silver nanoparticles on the phytopathogenic fungal growth were investigated. Fungal phytopathogens, especially for sclerotium-forming species Rhizoctonia solani, Sclerotinia sclerotiorum and S. minor, were selected due to their important roles in survival and disease cycle. Tests for the fungal hyphal growth revealed that silver nanoparticles remarkably inhibit the hyphal growth in a dose-dependent manner. Different antimicrobial efficiency of the silver nanoparticle was observed among the fungi on their hyphal growth in the following order, R. solani > S. sclerotiorum > S. minor. Tests for the sclerotial germination growth revealed that the nanoparticles showed significant inhibition effectiveness. In particular, the sclerotial germination growth of S. sclerotiorum was most effectively inhibited at low concentrations of silver nanoparticles. A microscopic observation revealed that hyphae exposed to silver nanoparticles were severely damaged, resulting in the separation of layers of hyphal wall and collapse of hyphae. This study suggests the possibility to use silver nanoparticles as an alternative to pesticides for scleotium-forming phytopathogenic fungal controls.
Identification of a Pathogen-Induced Glycine max Transcription Factor GmWRKY1
Kang, Sang-Gu ; Park, Eui-Ho ; Do, Kum-Sook ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 381~388
DOI : 10.5423/PPJ.2009.25.4.381
On screening pathogen-resistant soybean, we identified a WRKY type transcription factor named a Glycine max WRKY1 (GmWRKY1). Expression of GmWRKY1 gene was induced in the soybean sprout by Pseudomonas infection. The GmWRKY1 was expressed in all of the tissues with high levels in stems, leaves and developing seeds. The protein Gm WRKY1 contains highly conserved two WRKY DNA-binding domains having two
zinc-finger motif (
) in its N-terminal and C-terminal amino acid sequences. In electrophoresis mobility shift assay, the GmWRKY1 protein bound specifically to W-box elements in the promoters of defense related genes. These results demonstrated that GmWRKY1 is one of the soybean WRKY family genes and the plant-specific transcription factors for defense processes.
Priming of Defense-Related Genes Confers Root-Colonizing Bacilli-Elicited Induced Systemic Resistance in Pepper
Yang, Jung-Wook ; Yu, Seung-Hun ; Ryu, Choong-Min ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 389~399
DOI : 10.5423/PPJ.2009.25.4.389
A group of beneficial plant bacteria has been shown to increase crop growth referring to as plant growth-promoting rhizobacteria (PGPR). PGPR can decrease plant disease directly, through the production of antagonistic compounds, and indirectly, through the elicitation of a plant defense response termed induced systemic resistance (ISR). While the mechanism of PGPR-elicited ISR has been studied extensively in the model plant Arabidopsis, it is less well characterized in crop plants such as pepper. In an effort to better understand the mechanism of ISR in crop plants, we investigated the induction of ISR by Bacillus cereus strain BS107 against Xanthomonas axonopodis pv. vesicatoria in pepper leaves. We focused on the priming effect of B. cereus strain BS107 on plant defense genes as an ISR mechanism. Of ten known pepper defense genes that were previously reported to be involved in pathogen defense signaling, the expression of Capsicum annum pathogenesis-protein 4 and CaPR1 was systemically primed by the application of strain BS107 onto pepper roots confirming by quantitative-reverse transcriptase PCR. Our results provide novel genetic evidence of the priming effect of a rhizobacterium on the expression of pepper defense genes involved in ISR.
Isolation and Characterization of Pathogenesis-Related Protein 5 (PgPR5) Gene from Panax ginseng
Kim, Yu-Jin ; Lee, Jung-Hye ; Jung, Dae-Young ; Sathiyaraj, Gayathri ; Shim, Ju-Sun ; In, Jun-Gyo ; Yang, Deok-Chun ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 400~407
DOI : 10.5423/PPJ.2009.25.4.400
A pathogenesis-related protein (PgPR5) gene that isolated from the leaf of Panax ginseng was characterized. The ORF is 756 bp with a deduced amino acid sequence of 251 residues. The calculated molecular mass of the matured protein is approximately 27.5 kDa with a predicated isoelectric point of 7.80. A GenBank BlastX search revealed that the deduced amino acid of PgPR5 shares highest sequence similarity to PR5 of Actinidia deliciosa (80% identity, 87% similarity). PgPR5 has a C-terminal and N-terminal signal peptide, suggesting that it is a vacuolar secreted protein. The expression of PgPR5 under various environmental stresses was analyzed at different time points using real-time PCR. Our results reveal that PgPR5 is induced by salt stress, chilling stress, heavy metal, UV, and pathogen infection. These results suggest that the PgPR5 could play a role in the molecular defence response of ginseng to abiotic and pathogen attack. This is the first report of the isolation of PR5 gene from the P. ginseng.
Evaluation of Bacterial Blight Resistance Using SNP and STS Marker-assisted Selection in Aromatic Rice Germplasm
Kim, Jeong-Soon ; Gwang, Jae-Gyun ; Park, Ki-Hun ; Shim, Chang-Ki ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 408~416
DOI : 10.5423/PPJ.2009.25.4.408
A molecular survey was conducted to identify the presence of the bacterial blight resistance genes (Xa1, Xa4, xa5, xa13 and Xa21) in 86 accessions of aromatic rice obtained from germplasm. The results revealed that the resistance gene Xa4 (32.5%), Xa21 (17%), and xa5 (16%) were widely observed in tested rice germplasm. Among tested rice germplasm, 49 accessions showed the presence of more than one of five R genes, and 37 accessions possessed none of the R gene. TALLi and 05-IRRi-M-46 showed the presence of Xa4, xa5, xa13 and Xa21. Rice race
exhibited positive amplicon for the Xa1, Xa4, xa5 and Xa21. Hyangmibyeo1hos, Ir841-85-1-1-2 and Jasmine85 showed the positive amplicon for the Xa1, Xa4 and xa5 genes. Yekywin Yinkya Hmwe and Khao Dawk Mali105 showed the presence of Xa1, Xa4 and Xa21 gene. Masino Basmati showed the presence of xa5, xa13, Xa21 genes. Xa1 and Xa21 genes were noticed in Mihayngbyeo, Tarana Deshi, Mayataung and AZUCENA. Hyangmibyeo2ho, Basmati 6311 and Basmati405 possessed only two R genes such as Xa4 and xa5, and xa5 and xa13, respectively. The evaluation results of bacterial blight resistance genes in aromatic rice germplasm will help in breeding of multi disease resistant varieties.
Effects of Recombination on the Pathogenicity and Evolution of Pepper mottle virus
Jonson, Miranda Gilda ; Seo, Jang-Kyun ; Cho, Hong-Soo ; Kim, Jeong-Soo ; Kim, Kook-Hyung ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 417~421
DOI : 10.5423/PPJ.2009.25.4.417
The analysis of the full length genome of Korean isolates of Pepper mottle virus (PepMoV) in previous study showed molecular variations and are found to be related to symptom variation and pathogenicity (Kim et al., 2009, Virus Res. 144:83-88). To fully understand the molecular variation of PepMoV in Korea, we further assessed the role of RNA recombination to biological variation and evolution of PepMoV. Full-length genome of a total of 17 Korean-PepMoV and 2 American (CA and FL) isolates were examined for possible detection of genetic recombination using different recombination detections programs and detected 5 and 8 tentative recombination events using RDP3 and Splits Tree4 programs, respectively. Interestingly, tentative recombinants detected such as isolates 57, 134 and 217 were previously identified as severe isolates and 205135 and 205136 as differentiating isolates (Kim et al., 2009, Virus Res. 144:83-88). In addition, recombination was frequently detected in the Vb isolate, the first PepMoV isolate reported in Korea, suggesting significant involvement in the evolution of PepMoV in Korea. These initial results of our recombination analyses among PepMoV isolates in Korea may serve as clues to further investigate the biological variations and evolution of PepMoV brought about by recombination.
Field Evaluation of Mungbean Recombinant Inbred Lines against Mungbean Yellow Mosaic Disease Using New Disease Scale in Thailand
Akhtar, Khalid P. ; Kitsanachandee, R. ; Srinives, P. ; Abbas, G. ; Asghar, M.J. ; Shah, T.M. ; Atta, B.M. ; Chatchawankanphanich, O. ; Sarwar, G. ; Ahmad, M. ; Sarwar, N. ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 422~428
DOI : 10.5423/PPJ.2009.25.4.422
Studies were conducted to identify the sources of resistance in mungbean recombinant inbred lines (RILs) in Thailand against mungbean yellow mosaic disease (MYMD). 146 mungbean RILs in
series were evaluated in a field including resistant parent NM-10-12-1 and susceptible parent KPS 2 during summer 2008 under high inoculum pressure. The RILs were subsequently scored for disease symptom severity ratings (DSSR) using a new scale. Observations regarding DSSR and % disease index (%DI) showed that the tested RILs responded differently to the disease. A large number of RILs (132) were found highly susceptible, 12 were susceptible, 3 were tolerant and one was resistant. Overall screening results showed that three RILs, viz. line no. 30, 100 and 101 had minimum DSSR and % disease index thus they are good source of resistance to MYMD in spite of high disease pressure and can therefore be used directly as varieties to manage the disease in Thailand.
Bacterial Fruit Rot of Apricot Caused by Burkholderia cepacia in China
Fang, Yuan ; Li, Bin ; Wang, Fang ; Liu, Baoping ; Wu, Zhiyi ; Su, Ting ; Qiu, Wen ; Xie, Guanlin ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 429~432
DOI : 10.5423/PPJ.2009.25.4.429
An unreported disease of apricot was observed in orchards in Zhejiang province, China. Symptoms started as water soaked lesions on the fruit surface. Later, water-soaked areas developed and spread to the entire fruit, resulting in soft rot of the whole fruit. The causal organism isolated from symptomatic fruits was identified as Burkholderia cepacia based on its biochemical and physiological characteristics and confirmed by the cellular fatty acid composition and Biolog data as well as 16S rRNA gene sequence analysis. The bacterial isolates caused similar symptoms when inoculated onto fruits of apricot. In addition, European plum, Japanese plum, nectarine and kiwifruit were susceptible to the B. cepacia pathogen. However, the B. cepacia pathogen failed to cause any visible symptoms when it was inoculated onto 16 other fruits. This is the first report of a bacterial disease of apricot caused by B. cepacia in China.
Downy Mildew of Impatiens balsamina and I. walleriana in Korea
Choi, Young-Joon ; Han, Jae-Gu ; Park, Mi-Jeong ; Shin, Hyeon-Dong ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 433~433
DOI : 10.5423/PPJ.2009.25.4.433
First Report of Anthracnose Occurrence on Sloumi by Colletotrichum gloeosporioides in Korea
Choi, Kyoung-Ok ; Hong, Jeum-Kyu ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 434~434
DOI : 10.5423/PPJ.2009.25.4.434
Powdery Mildew of Trident Maple Caused by Sawadaea nankinensis in Korea
Lee, Sang-Hyun ; Seo, Sang-Tae ; Park, Mi-Jeong ; Shin, Hyeon-Dong ;
The Plant Pathology Journal, volume 25, issue 4, 2009, Pages 435~435
DOI : 10.5423/PPJ.2009.25.4.435