dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2013-09-30T18:47:48Z
dc.date.accessioned2014-05-20T13:57:00Z
dc.date.available2013-09-30T18:47:48Z
dc.date.available2014-05-20T13:57:00Z
dc.date.created2013-09-30T18:47:48Z
dc.date.created2014-05-20T13:57:00Z
dc.date.issued2009-01-01
dc.identifierFlora. Jena: Elsevier Gmbh, Urban & Fischer Verlag, v. 204, n. 7, p. 518-527, 2009.
dc.identifier0367-2530
dc.identifierhttp://hdl.handle.net/11449/20334
dc.identifier10.1016/j.flora.2008.07.003
dc.identifierWOS:000269649200004
dc.identifier2454528048086769
dc.description.abstractSyngonanthus elegans flowers are distributed in capitula whose involucral bracts open and close in a diurnal rhythm. The anatomy of these bracts was studied to understand how such movements occur and how it influences reproductive ecology of the species. The involucral bracts have a single layered epidermis composed of thick-walled cells on the abaxial surface, which are responsible for the movement. Since they are hygroscopic, these cells swell when they absorb water from the surrounding environment, causing the bracts to bend and the capitula to close. In natural conditions, the capitula open by day, when temperature increases and the relative air humidity decreases, and close at night, when temperature decreases and the relative air humidity increases. The involucral bracts may thus protect the flowers from abiotic factors, exposing them only at the time of the day when temperature is higher and insects are more active, favoring pollination by small insects. The closed capitula do not only protect the flowers, but they also function as a shelter for floral visitors as Brachiacantha australe (Coccinellidae) and Eumolpini sp. (Chrysomelidae). These small Coleoptera pollinate the flowers of S. elegans during the day and remain within the closed capitula during the night, in a possible mutualistic relationship. (C) 2008 Elsevier GmbH. All rights reserved.
dc.languageeng
dc.publisherElsevier Gmbh, Urban & Fischer Verlag
dc.relationFlora
dc.relation1.365
dc.relation0,570
dc.rightsAcesso aberto
dc.sourceWeb of Science
dc.subjectSyngonanthus elegans
dc.subjectEriocaulaceae
dc.subjectInvolucral bracts
dc.subjectHygroscopic movement
dc.subjectPollination biology
dc.subjectDiurnal inflorescence opening
dc.titleThe movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects
dc.typeActas de congresos


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