Journal of Integrative Plant Biology, 59 (3) : 180ĘC189, Mar 2017     Research Article

OPEN ACCESS ARTICLE

Fitness consequences of altering floral circadian oscillations for Nicotiana attenuata[OA]

Felipe Yon1, Danny Kessler1, Youngsung Joo1, Lucas Cortés Llorca1, Sang-Gyu Kim1,2 and Ian T. Baldwin1
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, D-07745 Jena, Germany
2Center for Genome Engineering, Institute for Basic Science, Yuseong-gu, 34047 Daejeon, South Korea

Correspondences:
E-mail: Sang-Gyu Kim (sgkim@ibs.re.kr), Ian T. Baldwin (baldwin@ice.mpg.de)

Online on 13 Dec 2016 at www.jipb.net and www.wileyonlinelibrary.com/journal/jipb

Abstract

Ecological interactions between flowers and pollinators are all about timing. Flower opening/closing and scent emissions are largely synchronized with pollinator activity, and a circadian clock regulates these rhythms. However, whether the circadian clock increases a plant's reproductive success by regulating these floral rhythms remains untested. Flowers of Nicotiana attenuata, a wild tobacco, diurnally and rhythmically open, emit scent and move vertically through a 140° arc to interact with nocturnal hawkmoths. We tethered flowers to evaluate the importance of flower positions for Manduca sexta-mediated pollinations; flower position dramatically influenced pollination. We examined the pollination success of phase-shifted flowers, silenced in circadian clock genes, NaZTL, NaLHY, and NaTOC1, by RNAi. Circadian rhythms in N. attenuata flowers are responsible for altered seed set from outcrossed pollen.


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Received 30 Nov 2016   Accepted 12 Dec 2016
© 2017 Institute of Botany, Chinese Academy of Sciences


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