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Type: Artigo
Title: Exploring the role of auxin in the androgynophore movement in passiflora
Author: Scorza, Livia C. T.
Dornelas, Marcelo Carnier
Abstract: The flowers of the species belonging to the genus Passiflora show a range of features that are thought to have arisen as adaptations to different pollinators. Some Passiflora species belonging to the subgenus Decaloba sect. Xerogona, show touch-sensitive motile androgynophores. We tested the role of auxin polar transport in the modulation of the androgynophore movement by applying auxin (IAA) or an inhibitor of auxin polar transport (NPA) in the flowers. We recorded the movement of the androgynophore during mechano-stimulation and analyzed the duration, speed, and the angle formed by the androgynophore before and after the movement, and found that both IAA and NPA increase the amplitude of the movement in P. sanguinolenta. We hypothesize that auxin might have a role in modulating the fitness of these Decaloba species to different pollination syndromes and demonstrate that an interspecific hybrid between insect- and hummingbird-pollinated Xerogona species present a heterosis effect on the speed of the androgynophore
Subject: Passiflora
Acido diclorofenoxiacetico
Country: Brasil
Editor: Sociedade Brasileira de Genética
Rights: Aberto
Identifier DOI: 10.1590/S1415-475738320140377
Date Issue: 2015
Appears in Collections:IB - Artigos e Outros Documentos

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