scholarly journals The Malvastrum Yellow Vein Virus C4 Protein Promotes Disease Symptom Development and Enhances Virus Accumulation in Plants

2019 ◽  
Vol 10 ◽  
Author(s):  
Chenchen Jing ◽  
Pengbai Li ◽  
Jiayuan Zhang ◽  
Rui Wang ◽  
Gentu Wu ◽  
...  
Keyword(s):  
Yellow Vein ◽  
Disease Symptom ◽  
Symptom Development ◽  
Virus Accumulation

The Titer of Citrus Yellow Vein Clearing Virus is Positively Associated with the Severity of Symptoms in Infected Citrus Seedlings

Plant Disease ◽  
2021 ◽  
Author(s):  
Yu Bin ◽  
Jianjian Xu ◽  
Zhimin Ma ◽  
Yu Duan ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Biological Properties ◽  
Yellow Vein ◽  
Citrus Limon ◽  
Cdna Clones ◽  
Symptom Development ◽  
Vein Clearing ◽  
Reverse Transcription Pcr ◽  
The Family ◽  
Citrus Production ◽  
Dialeurodes Citri

Citrus yellow vein clearing virus is a new member of the genus Mandarivirus in the family Alphaflexiviridae. Citrus yellow vein clearing virus (CYVCV) is the causal agent of citrus yellow vein clearing disease and is widely distributed in Pakistan, India, Turkey, and China. CYVCV is transmitted from citrus to citrus by Dialeurodes citri, grafting, and contaminated knife blades, threatening citrus production. In this study, four infectious full-length cDNA clones of CYVCV (namely AY112, AY132, AY212, and AY221) derived from CYVCV isolate AY were obtained through yeast homologous recombination and inoculated to ‘Eureka’ lemon (Citrus limon Burm. f.) by Agrobacterium-mediated vacuum infiltration. Pathogenicity analysis indicated that the clones AY212 and AY221 caused more severe symptoms than AY112 and AY132. Northern blot and quantitative reverse transcription PCR (qRT-PCR) analyses showed that the titers of virulent clones (AY212 and AY221) were significantly higher than those of attenuated clones (AY112 and AY132) in the infected ‘Eureka’ lemon (Citrus limon Burm. f.) seedlings. Subsequent comparative studies of viral infectivity, accumulation, and symptoms induced by AY221 in nine citrus cultivars indicated that (i) the infectivity of AY221 varied from 25% to 100% among different cultivars; (ii) ‘Oota’ ponkan (C. reticulata L.) showed the lowest infection rate with mild symptoms, which might be a useful resource for CYVCY-resistance genes; (iii) CYVCV titer was positively associated with the symptom development in infected citrus seedlings. In general, this report revealed the biological properties of CYVCV, thus laying a foundation for further investigation of pathogenic mechanisms in this virus.

scholarly journals The Arabidopsis transcription factor WRKY27 influences wilt disease symptom development caused byRalstonia solanacearum

2008 ◽  
Vol 56 (6) ◽  
pp. 935-947 ◽  
Author(s):  
M. Shahid Mukhtar ◽  
Laurent Deslandes ◽  
Marie-Christine Auriac ◽  
Yves Marco ◽  
Imre E. Somssich
Keyword(s):  
Transcription Factor ◽  
Wilt Disease ◽  
Disease Symptom ◽  
Symptom Development

scholarly journals Detached and Attached Arabidopsis Leaf Assays Reveal Distinctive Defense Responses Against Hemibiotrophic Colletotrichum spp.

2007 ◽  
Vol 20 (10) ◽  
pp. 1308-1319 ◽  
Author(s):  
Guosheng Liu ◽  
Regan Kennedy ◽  
David L. Greenshields ◽  
Gary Peng ◽  
Lily Forseille ◽  
...  
Keyword(s):  
Gene Expression Analysis ◽  
Defense Responses ◽  
Disease Symptom ◽  
Symptom Development ◽  
Detached Leaf ◽  
Reference Isolate ◽  
Pathogenesis Related ◽  
Detached Leaves ◽  
Colletotrichum Spp ◽  
Plant Assays

The agriculturally important genus Colletotrichum is an emerging model pathogen for studying defense in Arabidopsis. During the process of screening for novel pathogenic Colletotrichum isolates on Arabidopsis, we found significant differences in defense responses between detached and attached leaf assays. A near-adapted isolate Colletotrichum linicola A1 could launch a typical infection only on detached, but not attached, Arabidopsis leaves. Remarkably, resistance gene-like locus RCH1-mediated resistance in intact plants also was compromised in detached leaves during the attacks with the virulent reference isolate C. higginsianum. The differences in symptom development between the detached leaf and intact plant assays were further confirmed on defense-defective mutants following inoculation with C. higginsianum, where the greatest inconsistency occurred on ethylene-insensitive mutants. In intact Arabidopsis plants, both the salicylic acid- and ethylene-dependent pathways were required for resistance to C. higginsianum and were associated with induced expression of pathogenesis-related genes PR1 and PDF1.2. In contrast, disease symptom development in detached leaves appeared to be uncoupled from these defense pathways and more closely associated with senescence: an observation substantiated by coordinated gene expression analysis and disease symptom development, and chemically and genetically mimicking senescence.

scholarly journals A Critical Role of STAYGREEN/Mendel’s I Locus in Controlling Disease Symptom Development during Pseudomonas syringae pv tomato Infection of Arabidopsis

2011 ◽  
Vol 157 (4) ◽  
pp. 1965-1974 ◽  
Author(s):  
Christy Mecey ◽  
Paula Hauck ◽  
Marisa Trapp ◽  
Nathan Pumplin ◽  
Anne Plovanich ◽  
...  
Keyword(s):  
Pseudomonas Syringae ◽  
Critical Role ◽  
Disease Symptom ◽  
Symptom Development

scholarly journals Involvement of SGT1 in COR-mediated signal transduction pathway leading to disease symptom development

2011 ◽  
Vol 6 (7) ◽  
pp. 1072-1073 ◽  
Author(s):  
Yasuhiro Ishiga ◽  
Srinivasa Rao Uppalapati ◽  
Takako Ishiga ◽  
Kirankumar S. Mysore
Keyword(s):  
Signal Transduction ◽  
Signal Transduction Pathway ◽  
Disease Symptom ◽  
Transduction Pathway ◽  
Symptom Development

scholarly journals Vascular Occlusions in Grapevines with Pierce’s Disease Make Disease Symptom Development Worse

2013 ◽  
Vol 161 (3) ◽  
pp. 1529-1541 ◽  
Author(s):  
Qiang Sun ◽  
Yuliang Sun ◽  
M. Andrew Walker ◽  
John M. Labavitch
Keyword(s):  
Disease Symptom ◽  
Pierce's Disease ◽  
Symptom Development ◽  
Pierce’S Disease ◽  
Vascular Occlusions

SGT1 contributes to coronatine signaling and Pseudomonas syringae pv. tomato disease symptom development in tomato and Arabidopsis

2010 ◽  
Vol 189 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Srinivasa Rao Uppalapati ◽  
Yasuhiro Ishiga ◽  
Choong-Min Ryu ◽  
Takako Ishiga ◽  
Keri Wang ◽  
...  
Keyword(s):  
Pseudomonas Syringae ◽  
Disease Symptom ◽  
Symptom Development ◽  
Tomato Disease
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