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Strawberry latent ringspot virus Infecting Roses in India.

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Strawberry latent ringspot virus (SLRSV) has been identified as the cause of yellow flecking in Indian rose crops. This marks the first documented instance of SLRSV infecting roses in India, impacting cultivation.

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Area of Science:

  • Plant Pathology
  • Virology
  • Agricultural Science

Background:

  • Roses are a significant global and Indian crop.
  • Virus-like symptoms, including yellow leaf flecking and reduced leaflet size, were observed in Kangra Valley rose plantations.
  • These symptoms resembled those caused by Strawberry latent ringspot virus (SLRSV).

Purpose of the Study:

  • To identify the causal agent of observed symptoms in Indian rose plantations.
  • To confirm the presence and identity of Strawberry latent ringspot virus (SLRSV) in affected roses.
  • To document the first report of SLRSV infecting roses in India.

Main Methods:

  • Sap inoculation of indicator host Chenopodium amaranticolor to observe symptoms.
  • Enzyme-linked immunosorbent assay (ELISA) for SLRSV detection in rose cultivars.
  • Reverse transcription-polymerase chain reaction (RT-PCR) with SLRSV-specific primers and sequencing for confirmation.
  • Inoculation of rose seedlings with isolated SLRSV to verify pathogenicity.

Main Results:

  • Chlorotic local lesions and systemic chlorosis were observed in Chenopodium amaranticolor after inoculation.
  • SLRSV was successfully detected in six rose cultivars (Happiness, Iceberg, First Prize, Ganga, Pink Panther, Oklahoma) and the indicator host.
  • RT-PCR yielded a ˜181 bp product, confirmed by sequencing, verifying SLRSV presence.
  • Inoculated rose seedlings developed characteristic yellow flecking symptoms.

Conclusions:

  • The virus causing yellow flecking in Indian rose leaves is confirmed as Strawberry latent ringspot virus (SLRSV).
  • This study represents the first report of SLRSV infection in rose plants in India.
  • The findings highlight the economic threat SLRSV poses to rose cultivation in the region.