Abstract:
:In the Japanese pear pathotype of Alternaria alternata, H2O2 is generated solely from penetration pegs and not from other portions of subcuticular hyphae within the pectin layers of host leaves. A close association between H2O2 generation and fungal aggressiveness is expected because the pegs are important for fungal penetration into the host epidermis. To determine the potential role of reactive oxygen species in microbial pathogenicity, we studied the inhibitory effects of the antioxidant reagent ascorbic acid and the NADPH oxidase inhibitor diphenylene iodonium on infection of the pathogen. In our study, we showed H2O2 generation to be inhibited by inoculation with the mixture of ascorbic acid or diphenylene iodonium and spores at the pegs in the spore-inoculated host leaves. The decrease of generation in the pegs resulted in penetration failure, indicating that H2O2 generation probably contributed to strengthening of the penetration and probably was recruited by NADPH oxidase.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Hyon GS,Ikeda K,Hosogi N,Shinogi T,Park Pdoi
10.1094/PHYTO-100-9-0840subject
Has Abstractpub_date
2010-09-01 00:00:00pages
840-7issue
9eissn
0031-949Xissn
1943-7684journal_volume
100pub_type
杂志文章相关文献
PHYTOPATHOLOGY文献大全abstract::G-negative bacteria produce myriad N-acyl-homoserine lactones (AHLs) that can function as quorum sensing (QS) signaling molecules. AHLs are also known to regulate various plant biological activities. p-Coumaroyl-homoserine lactone (pC-HSL) is the only QS molecule produced by a photosynthetic bacterium, Rhodopseudomona...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-05-20-0177-R
更新日期:2020-09-02 00:00:00
abstract::ABSTRACT Mycosphaerella citri, the cause of citrus greasy spot, produces pseudothecia and ascospores in decomposing leaf litter on the grove floor. In laboratory studies, the effect of wetting and drying and temperature on the formation, maturation, and production of pseudothecia and ascospores was evaluated on mature...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2002.92.12.1267
更新日期:2002-12-01 00:00:00
abstract::Rice blast is one of the most damaging diseases of rice worldwide. In the present study, we analyzed DNA sequence variation of avirulence (AVR) genes of AVR-Pita1 in field isolates of Magnaporthe oryzae in order to understand the effectiveness of the resistance gene Pi-ta in China. Genomic DNA of 366 isolates of M. or...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-11-13-0302-R
更新日期:2014-07-01 00:00:00
abstract::ABSTRACT As a first step toward analysis of genetic variation and population structure in Peronospora tabacina, we used a collection of random genomic DNA fragments to survey for restriction fragment length polymorphisms (RFLPs) in DNA from a collection of isolates from Kentucky and other tobacco-growing regions of th...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2002.92.11.1236
更新日期:2002-11-01 00:00:00
abstract::Resin obtained from Pinus radiata and five monoterpene components of resin (limonene, α-pinene, β-pinene, camphene, and myrcene) were tested to determine their effects on mycelial growth and germination and survival of spores of Fusarium circinatum, the cause of pitch canker in pine, and F. temperatum, which is interf...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-02-14-0027-R
更新日期:2015-01-01 00:00:00
abstract::ABSTRACT Pyrenophora teres, the causal agent of net blotch of barley (Hordeum vulgare L.), induces a combination of necrosis and extensive chlorosis in susceptible barley cultivars. Cell-free filtrates from both net and spot forms of P. teres; P. teres f. sp. teres, and P. teres f. sp. maculata were found to contain p...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-97-8-0907
更新日期:2007-08-01 00:00:00
abstract::ABSTRACT A collection of race 1 and race 2 isolates of Fusarium oxysporum f. sp. lycopersici was screened for vegetative compatibility and characterized by random amplified polymorphic DNA (RAPD) analysis to establish the identity and genetic diversity of the isolates. Comparison of RAPD profiles revealed two main gro...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.1999.89.2.156
更新日期:1999-02-01 00:00:00
abstract::Citrus Huanglongbing (HLB) is the most severe disease of citrus plants caused by 'Candidatus Liberibacter asiaticus' and transmitted by the insect vector Asian citrus psyllid (ACP). No effective curative measure is available against HLB. For citrus production areas without HLB or with low HLB disease incidence, remova...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-11-18-0432-R
更新日期:2019-06-01 00:00:00
abstract::Phytophthora species are destructive fungus-like plant pathogens that use asexual single-celled flagellate zoospores for dispersal and plant infection. Many of the zoospore behaviors are density-dependent although the underlying mechanisms are poorly understood. Here, we use P. nicotianae as a model and demonstrate au...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-100-7-0632
更新日期:2010-07-01 00:00:00
abstract::Downy mildew of spinach (Spinacia oleracea), caused by Peronospora effusa, is a production constraint on production worldwide, including in California, where the majority of U.S. spinach is grown. The aim of this study was to develop a real-time quantitative polymerase chain reaction (qPCR) assay for detection of airb...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-02-14-0054-R
更新日期:2014-12-01 00:00:00
abstract::ABSTRACT Spread of Tomato spotted wilt virus (TSWV) and population development of its vector Frankliniella occidentalis were studied on the pepper accessions CPRO-1 and Pikante Reuzen, which are resistant and susceptible to thrips, respectively. Viruliferous thrips were released on plants of each accession (nonchoice ...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2003.93.10.1223
更新日期:2003-10-01 00:00:00
abstract::Preplant soil fumigation with metam sodium is used worldwide to control soilborne diseases. The development of accelerated degradation of pesticides in soil, including metam sodium, results in reduced pesticide efficacy. Therefore, we studied microbial involvement in accelerated degradation of methyl isothiocyanate (M...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-100-4-0367
更新日期:2010-04-01 00:00:00
abstract::ABSTRACT Isolates of Colletotrichum spp. from almond, avocado, and strawberry from Israel and isolates of the pink subpopulation from almond from the United States were characterized by various molecular methods and compared with morphological identification. Taxon-specific primer analysis grouped the avocado isolates...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2000.90.6.608
更新日期:2000-06-01 00:00:00
abstract::ABSTRACT An epidemiological model integrating three organizational scales of host plant populations (e.g., sites, leaves, and plants) is presented. At the lowest (site) scale, the model simulates the dynamics of vacant, latent, infectious, and removed sites. Three types of vacant sites are distinguished, depending on ...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2004.94.8.883
更新日期:2004-08-01 00:00:00
abstract::ABSTRACT Sphaeropsis sapinea is the causal agent of Sphaeropsis tip blight disease of pines. Past surveys of diseased and symptomless Austrian and Scots pines revealed that latent infections of symptomless shoots by S. sapinea are common. The role of these latent infections in the tip blight disease is unknown. A samp...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2003.93.12.1471
更新日期:2003-12-01 00:00:00
abstract::The importance of sexual recombination in determining fungal population structure cannot be inferred solely from the relative abundance of sexual and asexual spores and reproductive structures. To complement a previously reported study of proportions of Mycosphaerella graminicola ascocarps and pycnidia, we investigate...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-98-7-0752
更新日期:2008-07-01 00:00:00
abstract::ABSTRACT During the infection of citrus fruit by Penicillium digitatum there is little evidence of a host defense response. This suggests that P. digitatum has the ability to suppress host defenses. The current study demonstrates that P. digitatum suppresses a defense-related hydrogen peroxide (H(2)O(2)) burst in host...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-97-11-1491
更新日期:2007-11-01 00:00:00
abstract::Protein glycosylation is an essential process that plays an important role in proteome stability, protein structure, and protein function modulation in eukaryotes. However, in bacteria, especially plant pathogenic bacteria, similar studies are lacking. Here, we investigated the relationship between protein glycosylati...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-08-20-0327-R
更新日期:2020-11-11 00:00:00
abstract::ABSTRACT The possibility that the Ht1 gene or genes tightly linked to Ht1 convey general resistance to races of Exserohilum turcicum that are virulent against Ht1 (i.e., residual resistance) could be useful in sweet corn where the Ht1 gene is present in many commercial hybrids and breeding populations. The objective o...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-95-0085
更新日期:2005-01-01 00:00:00
abstract::Wheat landrace PI 177906 has seedling resistance to stem rust caused by Puccinia graminis f. sp. tritici races TTKSK, TTKST, and BCCBC and field resistance to the Ug99 race group. Parents, 140 recombinant inbred lines, and 138 double haploid (DH) lines were evaluated for seedling resistance to races TTKSK and BCCBC. P...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-08-16-0294-R
更新日期:2017-02-01 00:00:00
abstract::ABSTRACT The study was conducted to evaluate the potential of induced resistance to infestation of sunflower (Helianthus annuus L.) by the parasitic weed Orobanche cumana Wallr. Treatment of sunflower seeds with 40 ppm of benzo(1,2,3)thiadiazole-7-carbothioic acid S-methyl ester (BTH) for 36 h completely prevented inf...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2002.92.1.59
更新日期:2002-01-01 00:00:00
abstract::ABSTRACT Genetic structure of Phytophthora infestans, the causal agent of potato and tomato late blight, was analyzed spatially in a mixed potato and tomato production area in the Del Fuerte Valley, Sinaloa, Mexico. Isolates of P. infestans were characterized by mating type, allozyme analysis at the glucose-6-phosphat...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2001.91.12.1156
更新日期:2001-12-01 00:00:00
abstract::ABSTRACT The effects of take-all epidemics on winter wheat yield formation were determined, and disease-yield relationships were established to assess the agronomic efficacy and economic benefits of control methods. Epidemics were generated in naturally infested fields by varying cropping season, crop order in the rot...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO.2001.91.7.694
更新日期:2001-07-01 00:00:00
abstract::New York Clavibacter michiganensis subsp. michiganensis isolates, collected from disparate bacterial canker of tomato outbreaks over the past 11 years, were characterized with a multilocus sequence analysis (MLSA) scheme that differentiated the 51 isolates into 21 haplotypes with a discriminatory power of 0.944. The M...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-06-14-0178-R
更新日期:2015-02-01 00:00:00
abstract::Although 'Candidatus Liberibacter asiaticus' (Las) is a major pathogen associated with citrus huanglongbing (HLB), some characteristics of transmission by the psyllid vector Diaphorina citri are not fully understood. We examined the latent period and persistence of transmission of Las by D. citri in a series of experi...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-02-16-0088-R
更新日期:2017-03-01 00:00:00
abstract::Sudden death syndrome (SDS) of soybean has become a serious constraint to the production of this crop in North and South America. Phenotypic and multilocus molecular phylogenetic analyses, as well as pathogenicity experiments, have demonstrated that four morphologically and phylogenetically distinct fusaria can induce...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-100-1-0058
更新日期:2010-01-01 00:00:00
abstract::Potyviral helper component protease (HC-Pro), as a major determinant of symptom expression in susceptible plants, is a likely target candidate in the production of attenuated strains for cross-protection. In this study, single or double mutations of Lys (K) to Glu (E) in the Lys-Ile-Thr-Cys motif and Arg (R) to Ile (I...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-09-19-0328-R
更新日期:2020-01-01 00:00:00
abstract::Lily leaf blight, caused by Botrytis elliptica, is an important fungal disease in Taiwan. In order to identify an effective, nonfungicide method to decrease disease incidence in Lilium formosanum, the efficacy of rhizobacteria eliciting induced systemic resistance (ISR) was examined in this study. Over 300 rhizobacter...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-98-7-0830
更新日期:2008-07-01 00:00:00
abstract::Blast, caused by Pyricularia oryzae, has become an economically important disease in wheat in Brazil, but little effort has been devoted to understanding the wheat-P. oryzae interaction. This study was intended to determine the effects of P. oryzae infection on the photosynthetic process in wheat plants using a suscep...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-01-13-0024-R
更新日期:2014-01-01 00:00:00
abstract::To assess the diversity of Xanthomonas campestris spp. infecting crucifers in New York, 154 isolates were collected over 10 years across the state. The goal was to determine if isolates of the pathogen were overwintering in New York and serving as primary inoculum in subsequent years, or if novel isolates were enterin...
journal_title:Phytopathology
pub_type: 杂志文章
doi:10.1094/PHYTO-06-15-0134-R
更新日期:2016-02-01 00:00:00