scholarly journals Transmission Biology of Rice Stripe Mosaic Virus by an Efficient Insect Vector Recilia dorsalis (Hemiptera: Cicadellidae)

2017 ◽  
Vol 8 ◽  
Author(s):  
Xin Yang ◽  
Tong Zhang ◽  
Biao Chen ◽  
Guohui Zhou
Keyword(s):  
Mosaic Virus ◽  
Insect Vector ◽  
Transmission Biology

​RCA-based Detection of Begomoviruses in Weed Ggenera Associated with Legumes in Southern Karnataka

2021 ◽  
Author(s):  
Sudeep Pandey ◽  
T.R. Girish ◽  
S. Basavaraj ◽  
A.S. Padmaja ◽  
N. Nagaraju
Keyword(s):  
Mosaic Virus ◽  
Rolling Circle Amplification ◽  
Mosaic Disease ◽  
Yellow Mosaic Virus ◽  
Insect Vector ◽  
Weed Species ◽  
Ageratum Conyzoides ◽  
Yellow Mosaic Disease ◽  
Mungbean Yellow Mosaic Virus ◽  
Legume Crops

Background: Yellow mosaic disease (YMD) caused by begomoviruses transmitted through the insect vector Bemisia tabaci poses a serious threat to the production of legume crops. Methods: Season-long surveys were carried out for YMD occurrence in six different legume crops and associated natural weeds both symptomatic and asymptomatic across the districts of southern Karnataka, India. The samples were analyzed through RCA PCR using specific primer pairs. Result: Up to 94.1 per cent YMD incidence was recorded and nine weed species were commonly found associated with legume crops. The weeds viz., Ageratum conyzoides, Alternanthera sessilis, Commelina benghalensis and Euphorbia geniculata were abundantly found in the surveyed regions. The weeds were both symptomatic and asymptomatic. Rolling circle amplification coupled polymerase chain reaction method was employed to detect yellow mosaic virus in asymptomatic weeds. Phylogenetic analysis based on the sequences of PCR amplified products of weeds and symptomatic legumes revealed a close clustering of the weed samples with horsegram yellow mosaic virus, legume yellow mosaic virus and mungbean yellow mosaic virus. Overall, our data suggests the role of weed species associated with legume crops as alternative/collateral hosts of begomoviruses and their role in the epidemiology of yellow mosaic disease.

An Insect Vector of the Turnip Yellow Mosaic Virus

Nature ◽  
1946 ◽  
Vol 158 (4012) ◽  
pp. 417-417 ◽  
Author(s):  
KENNETH M. SMITH ◽  
ROY MARKHAM
Keyword(s):  
Mosaic Virus ◽  
Yellow Mosaic Virus ◽  
Insect Vector ◽  
Turnip Yellow Mosaic Virus

scholarly journals Structural Insights into the Molecular Mechanisms of Cauliflower Mosaic Virus Transmission by Its Insect Vector

2010 ◽  
Vol 84 (9) ◽  
pp. 4706-4713 ◽  
Author(s):  
François Hoh ◽  
Marilyne Uzest ◽  
Martin Drucker ◽  
Célia Plisson-Chastang ◽  
Patrick Bron ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Molecular Mechanisms ◽  
Structural Model ◽  
Coiled Coil ◽  
Virus Transmission ◽  
Cauliflower Mosaic Virus ◽  
Insect Vector ◽  
Virus Surface ◽  
X Ray Crystallography ◽  
Coil Structure

ABSTRACT Cauliflower mosaic virus (CaMV) is transmitted from plant to plant through a seemingly simple interaction with insect vectors. This process involves an aphid receptor and two viral proteins, P2 and P3. P2 binds to both the aphid receptor and P3, itself tightly associated with the virus particle, with the ensemble forming a transmissible viral complex. Here, we describe the conformations of both unliganded CaMV P3 protein and its virion-associated form. X-ray crystallography revealed that the N-terminal domain of unliganded P3 is a tetrameric parallel coiled coil with a unique organization showing two successive four-stranded subdomains with opposite supercoiling handedness stabilized by a ring of interchain disulfide bridges. A structural model of virus-liganded P3 proteins, folding as an antiparallel coiled-coil network coating the virus surface, was derived from molecular modeling. Our results highlight the structural and biological versatility of this coiled-coil structure and provide new insights into the molecular mechanisms involved in CaMV acquisition and transmission by the insect vector.

scholarly journals The impact of insecticides and plant extracts on the suppression of insect vector (Bemisia tabaci) of Mungbean yellow mosaic virus (MYMV)

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256449
Author(s):  
Muhammad Younas ◽  
Huasong Zou ◽  
Tasmia Laraib ◽  
Nasir Ahmad Rajpoot ◽  
Nasir Ahmad Khan ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Bemisia Tabaci ◽  
Plant Extracts ◽  
Eucalyptus Camaldulensis ◽  
Yellow Mosaic Virus ◽  
Insect Vector ◽  
Resistance Level ◽  
Visual Symptoms ◽  
Mungbean Yellow Mosaic Virus ◽  
The Impact

Mungbean yellow mosaic virus (MYMV) is an important constraint in successful production of mungbean (Vigna radiata L.) in many countries, including Pakistan. The MYMV spreads by insect vector whitefly (Bemisia tabaci Gennadius). The use of resistant cultivars is the most effective management tactics for MYMV. Twenty mungbean varieties/lines were screened against insect vector of MYMV under field condition in the current study. Resistance levels for varieties/lines were assessed through visual scoring of typical disease symptoms. Furthermore, the impacts of two insecticides ‘Imidacloprid’ and ‘Thiamethoxam’ and two plant extracts, i.e., neem (Azadirachta indica), and Eucalyptus (Eucalyptus camaldulensis) were tested on the suppression of whitefly. Field screening indicated that none of the tested varieties/lines proved immune/highly resistant, while significant variations were recorded among varieties/lines for resistance level. All varieties/lines were systemically infected with MYMV. The varieties ‘AARI-2006’ and ‘Mung-14043’ were considered as resistant to MYMV based on visual symptoms and the lowest vector population. These varieties were followed by ‘NM-2006’ and ‘NL-31’, which proved as moderately resistant to MYMV. All remaining varieties/lines were grouped as moderately to highly susceptible to MYMV based on visual symptoms’ scoring. These results revealed that existing mungbean germplasm do not possess high resistance level MYMV. However, the lines showing higher resistance in the current study must be exploited in breeding programs for the development of resistant mungbean varieties/lines against MYMV. Imidacloprid proved as the most effective insecticide at all concentrations to manage whitefly population. Therefore, use of the varieties with higher resistance level and spraying Imidacloprid could lower the incidence of MYMV.

scholarly journals An Antibody to the Putative Aphid Recognition Site on Cucumber Mosaic Virus Recognizes Pentons but Not Hexons

2002 ◽  
Vol 76 (23) ◽  
pp. 12250-12258 ◽  
Author(s):  
Valorie D. Bowman ◽  
Elaine S. Chase ◽  
Alexander W. E. Franz ◽  
Paul R. Chipman ◽  
Xing Zhang ◽  
...  
Keyword(s):  
Cucumber Mosaic Virus ◽  
Mosaic Virus ◽  
Electron Density ◽  
Insect Vector ◽  
Wild Type ◽  
Image Reconstruction Techniques ◽  
Synthetic Vaccines ◽  
Viral Particles ◽  
Icosahedral Virus ◽  
Potential Use

ABSTRACT Cucumber mosaic virus (CMV), the type member of the genus Cucumovirus (family Bromoviridae), is transmitted by aphids in a nonpersistent manner. Mutagenesis experiments identified the βH-βI loop of the capsid subunit as a potential key motif responsible for interactions with the insect vector. To further examine the functional characteristics of this motif, we generated monoclonal antibodies that bound to native virions but not to βH-βI mutants. Fab fragments from these antibodies were complexed with wild-type CMV and the virus-Fab structure was determined to 12-Å resolution by using electron cryomicroscopy and image reconstruction techniques. The electron density attributed to the bound antibody has a turret-like appearance and protrudes from each of the 12 fivefold axes of the icosahedral virus. Thus, the antibody binds only to the pentameric clusters (pentons) of A subunits of the T=3 quasisymmetric virus and does not appear to bind to any of the B and C subunits that occur as hexameric clusters (hexons) at the threefold (quasi-sixfold) axes. Modeling and electron density comparisons were used to analyze the paratope-epitope interface and demonstrated that the antibody binds to three βH-βI loops in three adjacent A subunits in each penton. This antibody can discriminate between A and B/C subunits even though the βH-βI loop adopts the same structure in all 180 capsid subunits and is therefore recognizing differences in subunit arrangements. Antibodies with such character have potential use as probes of viral assembly. Our results may provide an additional rationale for designing synthetic vaccines by using symmetrical viral particles.

scholarly journals Management of Okra Yellow Vein Mosaic Virus (OYVMV) Through Selected Insecticides and Light Reflecting Colored Mulches

2021 ◽  
Vol 3 (1) ◽  
pp. 161-165
Author(s):  
Md. Belal Hossain ◽  
Suraiya Jitu ◽  
Sanjana Akter ◽  
Md. Ariful Islam
Keyword(s):  
Mosaic Virus ◽  
Disease Incidence ◽  
Negative Relationship ◽  
Yellow Vein ◽  
Insect Vector ◽  
Yellow Vein Mosaic Virus ◽  
Red Color ◽  
Management Approaches ◽  
The Relationship ◽  
Black Color

A field experiment was conducted to evaluate the effect of light reflecting colored mulches and only one time spraying with selected insecticides to control the insect vector of Okra Yellow Vein Mosaic Virus (OYVMV) whitefly (Bemisia tabaci) at the central farm of Sher-e-Bangla Agricultural University, Dhaka-1207. The experiment was carried out in three blocks layouted with RCBD comprising eight treatments viz. T0 (control/no spray), T1 (1 time spray with imitaf), T2 (1 time spray with protect), T3 (1 time spray with tiddo plus), T4 (1 time spray with terbine), T5 (light reflecting silver color mulch), T6 (light reflecting red color mulch) and T7 (light reflecting black color mulch) with three replications. The mulches were used before sowing and insecticides were sprayed at 30 DAS. It was observed that among the light reflecting colored mulches, the lowest disease incidence (11.48%) was recorded in the plots which mulched with red color mulch (T6). Among the insecticides, the lowest disease incidence (30.17%) was recorded in plots that was sprayed with terbine (one time). Yield and yield contributing characters, morphological and physiological features of okra plant that changes due to disease infection which cause damages in okra production and reduce the fruit quality as well as market value was also the part of this study. Yield and yield contributing characters showed significant variance among the selected treatments. In the relationship study, it was noticed that the yield and plant height was showed negative relationship with disease incidence. However, considering all measuring parameters, spraying with terbine (one time) and used red color mulch may be recommended as good management approaches that will give higher okra production and lower disease incidence of Okra Yellow Vein Mosaic Virus (OYVMV).

scholarly journals Physical contact transmission of Cucumber green mottle mosaic virus by Myzus persicae

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252856
Author(s):  
Yu-Hua Qi ◽  
Yu-Juan He ◽  
Xin Wang ◽  
Chuan-Xi Zhang ◽  
Jian-Ping Chen ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Myzus Persicae ◽  
Plant Virus ◽  
Control Strategies ◽  
Specific Interaction ◽  
Physical Contact ◽  
Economic Losses ◽  
Insect Vector ◽  
Acquisition Rate ◽  
Contact Transmission

Cucumber green mottle mosaic virus (CGMMV), a critical plant virus, has caused significant economic losses in cucurbit crops worldwide. It has not been proved that CGMMV can be transmitted by an insect vector. In this study, the physical contact transmission of CGMMV by Myzus persicae in Nicotiana benthamiana plants was confirmed under laboratory conditions. The acquisition rate increased with time, and most aphids acquired CGMMV at 72 h of the acquisition access period (AAP). Besides, the acquired CGMMV was retained in the aphids for about 12 h, which was efficiently transmitted back to the healthy N. benthamiana plants. More importantly, further experiments suggested that the transmission was mediated by physical contact rather than the specific interaction between insect vector and plant virus. The results obtained in our study contribute to the development of new control strategies for CGMMV in the field.

scholarly journals Efficacy of Less Toxic Phytochemicals to Prevent the Insect Vector of <i>Mungbean Yellow Mosaic Virus</i> (<i>MYMV</i>)

2019 ◽  
Vol 10 (01) ◽  
pp. 44-54
Author(s):  
Jesmin Nahar Joly ◽  
Hosna Ara Chowdhury ◽  
Abdullah Ali Imtiaz ◽  
Fatema Begum ◽  
Hasibur Rahman ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Yellow Mosaic Virus ◽  
Insect Vector ◽  
Mungbean Yellow Mosaic Virus
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