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Type: Journal article
Title: The trichotomosulcate asparagoids: pollen morphology of Hemerocallidaceae in relation to systematics and pollination biology
Author: Furness, C.
Conran, J.
Gregory, T.
Rudall, P.
Citation: Australian Systematic Botany, 2013; 26(6):393-407
Publisher: CSIRO Publishing
Issue Date: 2013
ISSN: 1030-1887
Statement of
Carol A. Furness, John G. Conran, Thomas Gregory and Paula J. Rudall
Abstract: We examined pollen of 19 genera of Hemerocallidaceae by using scanning electron microscopy (SEM), and one genus (Dianella) by using transmission electron microscopy (TEM). Pollen was generally small in size, with a rounded triangular outline when hydrated, and a characteristic three-armed aperture, a distal trichotomosulcus. The pollen surface was finely sculptured and the exine was thin. Microreticulate pollen is a potential synapomorphy for several species of the ‘crown phormioid’ subclade recognised in molecular analyses. Perforate and fossulate pollen supports a relationship between several species of Dianella. Microrugulate pollen is more frequent in the johnsonioids than in the phormioids. Hemerocallis is distinguished by elongated monosulcate pollen, a relatively thick exine with a pronounced reticulate surface, and large globules of attached pollenkitt. We hypothesise that Hemerocallidaceae are ancestrally buzz-pollinated, and their pollen morphology is an adaptation to this pollination type. A reversal to butterfly or moth pollination occurred in Hemerocallis, with associated changes in pollen morphology.
Rights: © CSIRO 2014
RMID: 0020137766
DOI: 10.1071/SB13046
Published version:
Appears in Collections:Ecology, Evolution and Landscape Science publications

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