e-journal

Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers

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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 cond tions. 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.

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Ketersediaan

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Informasi Detail

Judul Seri

New Phytologist

No. Panggil

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Penerbit

: New Phytologist Trust., 2016

Deskripsi Fisik

New Phytologist (2016) 209: 1058–1066

Bahasa

English

ISBN/ISSN

doi: 10.1111/nph.136

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

BIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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