Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers

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Title
Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers
Author(s)
Felipe Yon; Youngsung Joo; Lucas Cortés Llorca; Eva Rothe; Ian T. Baldwin; Sang-Gyu Kim
Publication Date
2016-02
Journal
NEW PHYTOLOGIST, v.209, no.3, pp.1058 - 1066
Publisher
WILEY-BLACKWELL
Abstract
The rhythmic opening/closing and volatile emissions of flowers are known to attract pollinators at specific times. That these rhythms are maintained under constant light or dark conditions suggests a circadian clock involvement. Although a forward and reverse genetic approach has led to the identification of core circadian clock components in Arabidopsis thaliana, the involvement of these clock components in floral rhythms has remained untested, probably because of the weak diurnal rhythms in A. thaliana flowers. Here, we addressed the role of these core clock components in the flowers of the wild tobacco Nicotiana attenuata, whose flowers open at night, emit benzyl acetone (BA) scents and move vertically through a 140° arc. We first measured N. attenuata floral rhythms under constant light conditions. The results suggest that the circadian clock controls flower opening, BA emission and pedicel movement, but not flower closing. We generated transgenic N. attenuata lines silenced in the homologous genes of Arabidopsis LATE ELONGATED HYPOCOTYL (LHY) and ZEITLUPE (ZTL), which are known to be core clock components. Silencing NaLHY and NaZTL strongly altered floral rhythms in different ways, indicating that conserved clock components in N. attenuata coordinate these floral rhythms. © 2016 New Phytologist Trust
URI
https://pr.ibs.re.kr/handle/8788114/2403
ISSN
0028-646X
Appears in Collections:
Center for Genome Engineering(유전체 교정 연구단) > Journal Papers (저널논문)
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