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https://hdl.handle.net/2440/85527
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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 1446-5701 |
Statement of Responsibility: | 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 |
DOI: | 10.1071/SB13046 |
Published version: | http://www.publish.csiro.au/nid/150/paper/SB13046.htm |
Appears in Collections: | Aurora harvest 7 Ecology, Evolution and Landscape Science publications |
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