Seed-Borne and Seed-Transmitted Viruses

A special issue of Viruses (ISSN 1999-4915). This special issue belongs to the section "Viruses of Plants, Fungi and Protozoa".

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 4838

Special Issue Editors


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Guest Editor
Agriculture Victoria Research, AgriBio - Centre for AgriBioscience, 5 Ring Road, Bundoora, VIC 3083, Australia
Interests: plant viruses; viroids; high throughout sequencing; virus diversity; taxonomy; diagnostics; quarantine; seed borne viruses

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Guest Editor
Dept of Agriculture, Water and the Environment, Australian Government, Canberra, Australia
Interests: plant virology; seed-borne and seed-transmitted pathogens

Special Issue Information

Dear Colleagues,

Many fruits and vegetables, grains and pulses, ornamental and fodder crops are grown from seed. They are critical for food security and support the livelihoods of farmers and other stakeholders. However, botanical seed is a pathway for the movement and introduction of seed-borne and seed-transmissible pathogens, including viruses and viroids into regions where they were not previously found or re-introduction into affected regions, where they can have a significant impact on crop production. The growing demand and increased global trade in seed have heightened this risk. The reality of the risk is highlighted by recent outbreaks of Tobamovirus and Pospiviroid species in solanaceous and cucurbit crops globally, where the virus and viroid species were not previously known. Methods to control the risk can include the disinfestation of seed, controlling for disease during seed production, seed health testing for certification, and breeding for resistance.

This Special Issue will feature research papers that contribute to an improved understanding of the ecology and risk of seed-borne and seed-transmissible viruses and viroids, including those that occur in fruits and vegetables, grains and pulses, ornamental and fodder crop seeds. Studies that pertain to any aspect of seed-borne or seed-transmitted viruses or viroids are welcome, including quantitative and qualitative studies of how they contaminate or infect seed, attributes of specific relationships and interactions between hosts and pathogens that affect seed contamination and transmission, the mode and rate of transmission, effective control strategies, diagnostic testing and the science underpinning regulatory measures.

Dr. Fiona Constable
Dr. David Dall
Guest Editors

Manuscript Submission Information

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Keywords

  • seed
  • seed-borne
  • seed-transmissible
  • diagnostics
  • virus
  • viroid
  • ecology
  • epdiemiology
  • fruit
  • vegetable
  • grain
  • pulse
  • ornamental
  • fodder

Published Papers (1 paper)

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Research

15 pages, 1518 KiB  
Article
Seed Transmission of Three Viruses in Two Pear Rootstock Species Pyrus betulifolia and P. calleryana
by Liu Li, Lihong Wen, Guoping Wang, Yuzhuo LYU, Zuokun Yang, Xiaoping Yang, Qingyu Li and Ni Hong
Viruses 2022, 14(3), 599; https://doi.org/10.3390/v14030599 - 14 Mar 2022
Cited by 5 | Viewed by 2245
Abstract
Viral seed transmission causes the spread of many plant viral diseases. Pyrusbetulifolia and P. calleryana are important rootstock germplasms for pear production in China. This study revealed the widespread infection of apple stem grooving virus (ASGV), apple chlorotic leaf spot virus (ACLSV), [...] Read more.
Viral seed transmission causes the spread of many plant viral diseases. Pyrusbetulifolia and P. calleryana are important rootstock germplasms for pear production in China. This study revealed the widespread infection of apple stem grooving virus (ASGV), apple chlorotic leaf spot virus (ACLSV), and apple stem pitting virus (ASPV) in maternal trees of P. betulifolia and P. calleryana by nested multiplex reverse transcription-polymerase chain reaction (nmRT-PCR) assays. Seeds from eight P. betulifolia and two P. calleryana trees had positive rates of 15.9–73.9%, 0–21.2%, and 40.4% for ASGV, ASPV, and ACLSV, respectively. At the cotyledon and 6–8 true leaf stages, seedlings grown from seeds of infected trees gave positive rates of 5.4% and 9.3% for ASGV, 6.7% and 15.6% for ACLSV, and 0% and 2.7% for ASPV, respectively. Incidence in nursery P. betulifolia seedlings of 10.1%, 5.3%, and 3.5% were determined for ASGV, ACLSV, and ASPV, respectively. The nucleotide sequences of coat protein (CP) and movement protein coding genes of both ASGV and ASPV, and CP gene of ACLSV from maternal trees, seeds, and seedlings were analyzed. Sequence identities and phylogenetic comparison with corresponding sequences from GenBank demonstrated that molecular variation occurred within ASGV, ACLSV, and ASPV isolates, with most sequences determined here had close relationships with reported isolates infecting pear or formed independent clades. This is the first report on the seed transmission and the molecular characteristics of these viruses infecting two rootstock species. These findings provided important evidence in management effort for pear viral diseases. Full article
(This article belongs to the Special Issue Seed-Borne and Seed-Transmitted Viruses)
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