Abstract
Main conclusion
Infection by apple latent spherical virus (ALSV) vectors that promote the expression of Arabidopsis thaliana FLOWERING LOCUS T ( AtFT ) or Gentiana triflora GtFT s accelerates flowering in gentian and lisianthus plants.
Apple latent spherical virus (ALSV) has isometric virus particles (25 nm in diameter) that contain two ssRNA species (RNA1 and RNA2) and three capsid proteins (Vp25, Vp20, and Vp24). ALSV vectors are used for foreign gene expression and virus-induced gene silencing in a broad range of plant species. Here, we report the infection by ALSV vectors that express FLOWERING LOCUS T (AtFT) from Arabidopsis thaliana or its homolog GtFT1 from Gentiana triflora in three gentian cultivars (‘Iwate Yume Aoi’ [early flowering], ‘Iwate’ [medium flowering], and ‘Alta’ [late flowering]), and two lisianthus cultivars (‘Newlination Pink ver. 2’ and ‘Torukogikyou daburu mikkusu’) promotes flowering within 90 days post-inoculation using particle bombardment. Additionally, seedlings from the progeny of the early-flowering plants were tested by tissue blot hybridization, and the results showed that ALSV was not transmitted to the next generation. The promotion of flowering in the family Gentianaceae by ALSV vectors shortened the juvenile phase from 1–3 years to 3–5 months, and thus, it could be considered as a new plant breeding technique in ornamental gentian and lisianthus plants.
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Abbreviations
- ALSV:
-
Apple latent spherical virus
- AtFT:
-
Arabidopsis thaliana FLOWERING LOCUS T
- Dpi:
-
Days post-inoculation
- GtFT:
-
Gentiana triflora FLOWERING LOCUS T
- NBT:
-
New breeding technique
- TFL1:
-
TERMINAL FLOWER 1
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Acknowledgments
We are grateful to Mizue Hoshi and Kazumichi Fujiwara (Iwate Agricultural Research Center, 20-1 Narita, Kitakami city, Iwate, 024-0003, Japan) for supplying gentian seeds of cultivar ‘Iwate Yume Aoi’. This study was part of the Cross-ministerial Strategic Innovation Promotion Program ‘Technologies for creating next-generation agriculture, forestry, and fisheries’ supported by the Science and Technology Research Promotion Program for Agriculture, Forestry, Fisheries, and Food Industry, and by the Council for Science, Technology, and Innovation.
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Fekih, R., Yamagishi, N. & Yoshikawa, N. Apple latent spherical virus vector-induced flowering for shortening the juvenile phase in Japanese gentian and lisianthus plants. Planta 244, 203–214 (2016). https://doi.org/10.1007/s00425-016-2498-2
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DOI: https://doi.org/10.1007/s00425-016-2498-2