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Plant Pathology Journal

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https://www.readbyqxmd.com/read/29628822/identification-of-two-novel-amalgaviruses-in-the-common-eelgrass-zostera-marina-and-in-silico-analysis-of-the-amalgavirus-1-programmed-ribosomal-frameshifting-sites
#1
Dongbin Park, Chul Jun Goh, Hyein Kim, Yoonsoo Hahn
The genome sequences of two novel monopartite RNA viruses were identified in a common eelgrass ( Zostera marina ) transcriptome dataset. Sequence comparison and phylogenetic analyses revealed that these two novel viruses belong to the genus Amalgavirus in the family Amalgaviridae . They were named Zostera marina amalgavirus 1 (ZmAV1) and Zostera marina amalgavirus 2 (ZmAV2). Genomes of both ZmAV1 and ZmAV2 contain two overlapping open reading frames (ORFs). ORF1 encodes a putative replication factory matrix-like protein, while ORF2 encodes a RNA-dependent RNA polymerase (RdRp) domain...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628821/comparison-of-microbial-community-structure-in-kiwifruit-pollens
#2
Min-Jung Kim, Chang-Wook Jeon, Gyongjun Cho, Da-Ran Kim, Yong-Bum Kwack, Youn-Sig Kwak
Flowers of kiwifruit are morphologically hermaphroditic and survivable binucleate pollen is produced by the male flowers. In this study, we investigated microbial diversity in kiwifruit pollens by analyzing amplicon sequences of 16S rRNA. Four pollen samples were collected: 'NZ' was imported from New Zealand, 'CN' from China in year of 2014, respectively. 'KR13' and 'KR14' were collected in 2013' and 2014' in South Korea. Most of the identified bacterial phyla in the four different pollens were Proteobacteria, Actinobacteria and Firmicutes...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628820/virulence-phenotyping-and-molecular-characterization-of-a-new-virulence-type-of-pyrenophora-tritici-repentis-the-causal-agent-of-tan-spot
#3
Hamida Benslimane
Pyrenophoratritici-repentis is the causal agent of tan spot. According to their ability to produce necrosis and/or chlorosis on a set of four differential bread wheats, the isolates of this fungus are currently grouped into eight races. When durum wheat genotypes were added to the differential set, a new virulence type was identified in Algeria. The isolates showing this virulence pattern are unable to attack bread wheat while they cause necrosis in durum genotypes. In this work, characterization of those isolates was based on pathological and molecular aspects...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628819/exploring-the-potentiality-of-novel-rhizospheric-bacterial-strains-against-the-rice-blast-fungus-magnaporthe-oryzae
#4
Narayanappa Amruta, M K Prasanna Kumar, M E Puneeth, Gowdiperu Sarika, Hemanth Kumar Kandikattu, K Vishwanath, Sonnappa Narayanaswamy
Rice blast caused by Magnaporthe oryzae is a major disease. In the present study, we aimed to identify and evaluate the novel bacterial isolates from rice rhizosphere for biocontrol of M. oryzae pathogen. Sixty bacterial strains from the rice plant's rhizosphere were tested for their biocontrol activity against M. oryzae under in vitro and in vivo . Among them, B. amyloliquefaciens had significant high activity against the pathogen. The least disease severity and highest germination were recorded in seeds treated with B...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628818/efficacy-of-newer-molecules-bioagents-and-botanicals-against-maydis-leaf-blight-and-banded-leaf-and-sheath-blight-of-maize
#5
Vinod Kumar Malik, Manjeet Singh, Karambir Singh Hooda, Naresh Kumar Yadav, Prashant Kumar Chauhan
Maize ( Zea mays L.; 2N=20) is major staple food crop grown worldwide adapted to several biotic and abiotic stresses. Maydis leaf blight (MLB) and banded leaf and sheath blight (BLSB) are serious foliar fungal diseases may cause up to 40% and 100% grain yield loss, respectively. The present studies were undertaken to work out the efficacy of chemicals, botanicals and bioagents for the management of MLB and BLSB under field condition for two seasons Kharif 2014 and 2015. Five molecules (propiconazole 25 EC, hexaconazole 25 EC, carbendazim 50 WP, mancozeb 75 WP and carbedazim 12 WP + mancozeb 63 WP), two bioagents i...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628817/ultrastructures-of-colletotrichum-orbiculare-in-cucumber-leaves-expressing-systemic-acquired-resistance-mediated-by-chlorella-fusca
#6
Su Jeung Kim, Eun Ju Ko, Jeum Kyu Hong, Yong Chull Jeun
Chlorella , one single-cell green algae organism that lives autotrophically by photosynthesis, can directly suppress some plant diseases. The objective of this study was to determine whether pre-spraying with Chlorella fusca suspension could induce systemic acquired resistance (SAR) in cucumber plants against anthracnose caused by Colletotrichum orbiculare . In order to illustrate SAR induced by algae, infection structures in host cells were observed under a transmission electron microscope (TEM). Cytological changes as defense responses of host mesophyll cells such as accumulation of vesicles, formation of sheath around penetration hyphae, and thickness of cell wells adjoining with intracellular hyphae were demonstrated in cucumber leaves...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628816/specific-and-sensitive-primers-developed-by-comparative-genomics-to-detect-bacterial-pathogens-in-grains
#7
Kwang Yeol Baek, Hyun-Hee Lee, Geun Ju Son, Pyeong An Lee, Nazish Roy, Young-Su Seo, Seon-Woo Lee
Accurate and rapid detection of bacterial plant pathogen is the first step toward disease management and prevention of pathogen spread. Bacterial plant pathogens Clavibacter michiganensis subsp. nebraskensis ( Cmn ), Pantoea stewartii subsp. stewartii ( Pss ), and Rathayibacter tritici ( Rt ) cause Goss's bacterial wilt and blight of maize, Stewart's wilt of maize and spike blight of wheat and barley, respectively. The bacterial diseases are not globally distributed and not present in Korea. This study adopted comparative genomics approach and aimed to develop specific primer pairs to detect these three bacterial pathogens...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628815/evaluation-of-pathogenic-variability-based-on-leaf-blotch-disease-development-components-of-bipolaris-sorokiniana-in-triticum-aestivum-and-agroclimatic-origin
#8
Sabiha Sultana, Sanjoy Kumar Adhikary, Md Monirul Islam, Sorder Mohammad Mahbubur Rahman
Leaf blotch of wheat caused by Bipolaris sorokiniana is a major constraint to wheat production, causing significant yield reduction resulting in severe economic impact. The present study characterizes to determine and compare pathogenic variability exist/not based on components of leaf blotch disease development and level of aggressiveness due to agroclimatic condition of B. sorokiniana in wheat. A total of 169 virulent isolates of B. sorokiniana isolated from spot blotch infected leaf from different wheat growing agroclimate of Bangladesh...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29628814/the-current-status-and-future-outlook-of-quantum-dot-based-biosensors-for-plant-virus-detection
#9
REVIEW
Sungyeap Hong, Cheolho Lee
Enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR), widely used for the detection of plant viruses, are not easily performed, resulting in a demand for an innovative and more efficient diagnostic method. This paper summarizes the characteristics and research trends of biosensors focusing on the physicochemical properties of both interface elements and bioconjugates. In particular, the topological and photophysical properties of quantum dots (QDs) are discussed, along with QD-based biosensors and their practical applications...
April 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422791/reduced-bacterial-wilt-in-tomato-plants-by-bactericidal-peroxyacetic-acid-mixture-treatment
#10
Jeum Kyu Hong, Su Jeong Jang, Young Hee Lee, Yeon Sook Jo, Jae Gill Yun, Hyesu Jo, Chang-Jin Park, Hyo Joong Kim
Peroxyacetic acid mixture Perosan, composed of peroxyacetic acid, hydrogen peroxide and acetic acid, was evaluated for eco-friendly management of tomato bacterial wilt by Ralstonia pseudosolanacearum . Perosan drastically suppressed in vitro growth of R. pseudosolanacearum in liquid cultures in dose- and incubation time-dependent manners. Higher perosan doses (0.1 and 1%) caused lowered pH and phytotoxicity to detached leaves of two tomato cultivars Cupirang and Benekia 220 in aqueous solution. Treatment with 0...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422790/hr-mediated-defense-response-is-overcome-at-high-temperatures-in-capsicum-species
#11
Bong Nam Chung, Joung-Ho Lee, Byoung-Cheorl Kang, Sang Wook Koh, Jae Ho Joa, Kyung San Choi, Jeong Joon Ahn
Resistance to Tomato spotted wilt virus isolated from paprika (TSWV-Pap) was overcome at high temperatures (30 ± 2°C) in both accessions of Capsicum annuum S3669 (Hana Seed Company) and C. chinense PI15225 (AVRDC Vegetable Genetic Resources). S3669 and PI15225, which carrying the Tsw gene, were mechanically inoculated with TSWV-Pap, and then maintained in growth chambers at temperatures ranging from 15 ± 2°C to 30 ± 2°C (in 5°C increments). Seven days post inoculation (dpi), a hypersensitivity reaction (HR) was induced in inoculated leaves of PI152225 and S3669 plants maintained at 25°C ± 2°C...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422789/detection-of-co-infection-of-notocactus-leninghausii-f-cristatus-with-six-virus-species-in-south-korea
#12
Chung Hwa Park, Eun Gyeong Song, Ki Hyun Ryu
Co-infection with two virus species was previously reported in some cactus plants. Here, we showed that Notocactus leninghausii f. cristatus can be co-infected with six different viruses: cactus mild mottle virus (CMMoV)-Nl, cactus virus X (CVX)-Nl, pitaya virus X (PiVX)-Nl, rattail cactus necrosis-associated virus (RCNaV)-Nl, schlumbergera virus X (SchVX)-Nl, and zygocactus virus X (ZyVX)-Nl. The coat protein sequences of these viruses were compared with those of previously reported viruses. CMMoV-Nl, CVX-Nl, PiVX-Nl, RCNaV-Nl, SchVX-Nl, and ZyVX-Nl showed the greatest nucleotide sequence homology to CMMoV-Kr (99...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422788/first-isolation-and-molecular-characterization-of-bacteriophages-infecting-acidovorax-citrulli-the-causal-agent-of-bacterial-fruit-blotch
#13
Aryan Rahimi-Midani, Yong Seok Lee, Se-Won Kang, Mi-Kyeong Kim, Tae-Jin Choi
Bacteriophages of Acidovorax citrulli , the causal agent of bacterial fruit blotch, were isolated from 39 watermelon, pumpkin, and cucumber leaf samples collected from various regions of Korea and tested against 18 A. citrulli strains. Among the six phages isolated, ACP17 forms the largest plaque, and exhibits the morphology of phages in the Myoviridae family with a head diameter of 100 ± 5 nm and tail length of 150 ± 5 nm. ACP17 has eclipse and latent periods of 25 ± 5 min and 50 ± 5 min, respectively, and a burst size of 120...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422787/effect-of-producing-different-phenazines-on-bacterial-fitness-and-biological-control-in-pseudomonas-chlororaphis-30-84
#14
Jun Myoung Yu, Dongping Wang, Leland S Pierson, Elizabeth A Pierson
Pseudomonas chlororaphis 30-84 is a biological control agent selected for its ability to suppress diseases caused by fungal pathogens. P. chlororaphis 30-84 produces three phenazines: phenazine-1-carboxylic acid (PCA), 2-hydroxy-phenazine-1-carboxylic acid (2OHPCA) and a small amount of 2-hydroxy-phenazine (2OHPHZ), and these are required for fungal pathogen inhibition and wheat rhizosphere competence. The two, 2-hydroxy derivatives are produced from PCA via the activity of a phenazine-modifying enzyme encoded by phzO ...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422786/hydrogen-cyanide-produced-by-pseudomonas-chlororaphis-o6-exhibits-nematicidal-activity-against-meloidogyne-hapla
#15
Beom Ryong Kang, Anne J Anderson, Young Cheol Kim
Root-knot nematodes ( Meloidogyne spp.) are parasites that attack many field crops and orchard trees, and affect both the quantity and quality of the products. A root-colonizing bacterium, Pseudomonas chlororaphis O6, possesses beneficial traits including strong nematicidal activity. To determine the molecular mechanisms involved in the nematicidal activity of P. chlororaphis O6, we constructed two mutants; one lacking hydrogen cyanide production, and a second lacking an insecticidal toxin, FitD. Root drenching with wild-type P...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422785/analysis-of-genetic-and-pathogenic-diversity-of-ralstonia-solanacearum-causing-potato-bacterial-wilt-in-korea
#16
Heejung Cho, Eun-Sung Song, Young Kee Lee, Seungdon Lee, Seon-Woo Lee, Ara Jo, Byoung-Moo Lee, Jeong-Gu Kim, Ingyu Hwang
The Ralstonia solanacearum species complex (RSSC) can be divided into four phylotypes, and includes phenotypically diverse bacterial strains that cause bacterial wilt on various host plants. This study used 93 RSSC isolates responsible for potato bacterial wilt in Korea, and investigated their phylogenetic relatedness based on the analysis of phylotype, biovar, and host range. Of the 93 isolates, twenty-two were identified as biovar 2, eight as biovar 3, and sixty-three as biovar 4. Applied to the phylotype scheme, biovar 3 and 4 isolates belonged to phylotype I, and biovar 2 isolates belonged to phylotype IV...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422784/genome-wide-analysis-of-type-vi-system-clusters-and-effectors-in-burkholderia-species
#17
Thao Thi Nguyen, Hyun-Hee Lee, Inmyoung Park, Young-Su Seo
Type VI secretion system (T6SS) has been discovered in a variety of gram-negative bacteria as a versatile weapon to stimulate the killing of eukaryotic cells or prokaryotic competitors. Type VI secretion effectors (T6SEs) are well known as key virulence factors for important pathogenic bacteria. In many Burkholderia species, T6SS has evolved as the most complicated secretion pathway with distinguished types to translocate diverse T6SEs, suggesting their essential roles in this genus. Here we attempted to detect and characterize T6SSs and potential T6SEs in target genomes of plant-associated and environmental Burkholderia species based on computational analyses...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29422783/-enterobacter-cloacae-an-emerging-plant-pathogenic-bacterium-affecting-chili-pepper-seedlings
#18
Tanahiri García-González, Hilda Karina Sáenz-Hidalgo, Hilda Victoria Silva-Rojas, Carlos Morales-Nieto, Taca Vancheva, Ralf Koebnik, Graciela Dolores Ávila-Quezada
A previously unreported bacterial disease on chili pepper ( Capsicum annuum L.) seedlings affecting as many as 4% of seedlings was observed in greenhouses in Chihuahua, Mexico (Delicias and Meoqui counties). Initial lesions appeared as irregular small spots on leaves and brown necrosis at margins tips were observed. Later, the spots became necrotic with a chlorotic halo. Advanced disease was associated with defoliation. A Gram negative, rod-shaped bacterium was isolated from diseased chili pepper seedlings...
February 2018: Plant Pathology Journal
https://www.readbyqxmd.com/read/29238286/cell-wall-localization-of-two-duf642-proteins-biidxi-and-teebe-during-meloidogyne-incognita-early-inoculation
#19
Alexis Salazar-Iribe, Esther Zúñiga-Sánchez, Emma Zavaleta Mejía, Alicia Gamboa-deBuen
The root-knot nematode Meloidogyne incognita infects a variety of plants, including Arabidopsis thaliana . During migration, root-knot nematodes secrete different proteins to modify cell walls, which include pectolytic enzymes. However, the contribution of host cell wall proteins has not been described during this process. The function of two DUF642 cell wall proteins, BIIDXI (BDX, At4g32460 ) and TEEBE (TEB, At2g41800 ), in plant development could be related to the regulation of pectin methyl esterification status in the cell walls of different tissues...
December 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/29238285/generation-of-an-infectious-clone-of-a-new-korean-isolate-of-apple-chlorotic-leaf-spot-virus-driven-by-dual-35s-and-t7-promoters-in-a-versatile-binary-vector
#20
Ik-Hyun Kim, Jae-Yeong Han, In-Sook Cho, HyeKyoung Ju, Jae Sun Moon, Eun-Young Seo, Hong Gi Kim, John Hammond, Hyoun-Sub Lim
The full-length sequence of a new isolate of Apple chlorotic leaf spot virus (ACLSV) from Korea was divergent, but most closely related to the Japanese isolate A4, at 84% nucleotide identity. The full-length cDNA of the Korean isolate of ACLSV was cloned into a binary vector downstream of the bacteriophage T7 RNA promoter and the Cauliflower mosaic virus 35S promoter. Chenopodium quinoa was successfully infected using in vitro transcripts synthesized using the T7 promoter, detected at 20 days post inoculation (dpi), but did not produce obvious symptoms...
December 2017: Plant Pathology Journal
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