Exploring the role of auxin in the androgynophore movement in Passiflora

Clicks: 88
ID: 276597
2015
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Abstract
The flowers of the species belonging to the genus Passiflorashow 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 movement.
Reference Key
scorza2015exploringgenetics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Scorza, Livia C.T.;Dornelas, Marcelo Carnier;
Journal Genetics and molecular biology
Year 2015
DOI
10.1590/S1415-475738320140377
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300301&lng=en&tlng=en
Keywords
Zoology Microbiology Science dermatology environmental sciences plant ecology plant culture genetics

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