Photoperiodic induction of synchronous flowering near the Equator

Rolf Borchert (), Susanne S. Renner, Zoraida Calle, Diego Navarrete, Alan Tye, Laurent Gautier, Rodolphe Spichiger and Patricio von Hildebrand
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Rolf Borchert: University of Kansas
Susanne S. Renner: Ludwig Maximilians University
Zoraida Calle: Center for Research on Sustainable Agriculture CIPAV
Diego Navarrete: Fundacion Puerto Rastrojo
Alan Tye: Charles Darwin Research Station
Laurent Gautier: Conservatoire et Jardin botaniques de la Ville de Genève
Rodolphe Spichiger: Conservatoire et Jardin botaniques de la Ville de Genève
Patricio von Hildebrand: Fundacion Puerto Rastrojo

Nature, 2005, vol. 433, issue 7026, 627-629

Abstract: Abstract In tropical rainforests, 30–65% of tree species grow at densities of less than one individual per hectare1. At these low population densities, successful cross-pollination relies on synchronous flowering. In rainforests with low climatic seasonality, photoperiodic control is the only reliable mechanism for inducing synchronous flowering2,3. This poses a problem because there is no variation in day length at the Equator. Here we propose a new mechanism of photoperiodic timekeeping based on the perception of variation in sunrise or sunset time, which explains and predicts the annually repeated, staggered, synchronous and bimodal flowering of many tree species in Amazonian rainforests near the Equator.

Date: 2005
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DOI: 10.1038/nature03259

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