Overexpression of <Emphasis Type="Italic">AP1-</Emphasis>like genes from <Emphasis Type="Italic">Asteraceae</Emphasis> induces early-flowering in transgenic <Emphasis Type="Italic">Chrysanthemum</Emphasis> plants |
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Authors: | Olga A Shulga Tatyana Yu Mitiouchkina Anna V Shchennikova Konstantin G Skryabin Sergey V Dolgov |
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Institution: | (1) Centre “Bioengineering” RAS, prospect 60-let Oktyabrya 7/1, 117312 Moscow, Russia;(2) Branch of Shemyakin Institute of Bioorganic Chemistry RAS, Science Avenue 6, 142290 Pushchino, Moscow region, Russia |
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Abstract: | Chrysanthemum is one of the most important commercial cut flowers in the world. Early-flowering cultivars are required to
produce quality chrysanthemum flowers with a lower cost of production. To shorten the vegetative growth phase of chrysanthemum,
three AP1-like genes from Asteraceae were constitutively overexpressed in 80 independent transgenic chrysanthemum lines. All lines were characterized by PCR and
RT-PCR and demonstrated that overexpression of compositae AP1-homologs in transgenic chrysanthemum under long-day conditions had no effect on plant development compared to non-transgenic
controls. Conversely, under short-day conditions, transgenic plants commenced bud initiation 2 wk earlier than non-transgenic
chrysanthemum plants. Subsequently, transgenic chrysanthemum flowers showed color earlier and resulted in full opening of
inflorescences 3 wk prior to non-transgenic control plants. These results open new possibilities for genetic improvement and
breeding of chrysanthemum cultivars. |
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