21 research outputs found
Effects of tissue sampling position, primary and secondary infection, cultivar, and storage temperature and duration on the detection, concentration and distribution of three viruses within infected potato tubers
Infection of potato plants with potato leafroll virus changes attraction and feeding behaviour of Myzus persicae
7 pages, and tables, and figures.Potato leafroll virus (PLRV; genus
Polerovirus
, family Luteoviridae) is a persistently transmitted
circulative virus that depends on aphids for spreading. The primary vector of PLRV is the aphid
Myzus persicae
(Sulzer) (Homoptera: Aphididae).
Solanum tuberosum
L. potato cv. Kardal (Solanaceae)
has a certain degree of resistance to
M. persicae
: young leaves seem to be resistant, whereas senescent
leaves are susceptible. In this study, we investigated whether PLRV-infection of potato plants affected
aphid behaviour. We found that
M. persicae
’s ability to differentiate headspace volatiles emitted from
PLRV-infected and non-infected potato plants depends on the age of the leaf. In young apical leaves,
no difference in aphid attraction was found between PLRV-infected and non-infected leaves. In fact,
hardly any aphids were attracted. On the contrary, in mature leaves, headspace volatiles from virus
infected leaves attracted the aphids. We also studied the effect of PLRV-infection on probing and
feeding behaviour (plant penetration) of
M. persicae
using the electrical penetration graph technique
(DC system). Several differences were observed between plant penetration in PLRV-infected and
non-infected plants, but only after infected plants showed visual symptoms of PLRV infection. The
effects of PLRV-infection in plants on the behaviour of
M. persicae
, the vector of the virus, and the
implications of these effects on the transmission of the virus are thoroughly discussed.Peer reviewe
The Occurrence and Characterization of New Recombinant Isolates of PVY Displaying Shared Properties of PVY N
Infection of potato plants with potato leafroll virus changes attraction and feeding behaviour of Myzus persicae
Molecular characterization of the CP gene and 3'UTR of Chilli veinal mottle virus from South and Southeast Asia
Impact of Positive Selection on Incidence of Different Viruses During Multiple Generations of Potato Seed Tubers in Uganda
General Characteristics of Potato virus Y (PVY) and Its Impact on Potato Production: An Overview
BGPI : Ă©quipe 6Diseases caused by plant viruses can have significant and devastating impacts on many cultivated crops worldwide. The impact of disease caused by a virus depends on the virus species, strains, type of inoculum, host plant characteristics, vector pressure, climatic conditions, trade, changes in agricultural landscape and intensive production practices. Viruses affect plants by causing a large variety of symptoms such as alteration of shape, pigmentation, necrosis on different parts of the plant, thus affecting plant development. In most of the cases, these lead to a decrease in crop yield and quality. There are numerous viruses that affect potato; among them, Potato virus Y is considered to be one of the ten most important plant viruses of crops, because of its worldwide distribution and economic impact. Some PVY isolates are able to cause potato ringspot necrotic disease in infected tubers rendering them unmarketable. Understanding the genetic diversity and molecular biology of PVY is essential to understand its infectious cycle, epidemiology and developing efficient methods of control and management for the virus itself and its vector. In spite of an ever-increasing wealth of data in these topics, several major scientific challenges remain in understanding the molecular nature of the interaction between PVY, its hosts, aphid vector in different environments and the epidemiology of PVY. This and following chapters will present the context and current state of our knowledge for these different topics and attempt to provide some answers to these important questions