Biologia Plantarum (Dec 2020)

Virus induced PhFTRv gene silencing results in yellow-green leaves and reduced cold tolerance in petunia

  • L. SANG,
  • L. PENG,
  • Z. QIU,
  • F. LUO,
  • G. CHEN,
  • L. GAO,
  • Y. YU,
  • J. LIU

DOI
https://doi.org/10.32615/bp.2020.151
Journal volume & issue
Vol. 64, no. 1
pp. 807 – 813

Abstract

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Ferredoxin-thioredoxin reductase (FTR) is an iron-sulfur protein that supplies electrons from photochemically reduced ferredoxin (Fd) to thioredoxin (Trx) in the ferredoxin/thioredoxin system in chloroplasts. The FTR is a heterodimer with a variable subunit (FTRv) and a catalytic subunit (FTRc). The function of FTRv is not well known. In petunia (Petunia hybrida), FTRv is a single-copy gene, which is named PhFTRv. In this study, the spatio-temporal expression of PhFTRv in petunia was analyzed, and PhFTRv transcription was found to be high in leaves and stems. A tobacco rattle virus gene silencing was used in this study. Virus induced gene silencing-mediated PhFTRv silencing resulted in large yellow-green leaves, delayed flowering, and reduced cold tolerance in petunia plants.

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