Identification of intracellular calcium oxalate crystals in Chamelaucium uncinatum (Myrtaceae)

Macnish, Andrew, Irving, Donald, Joyce, Daryl, Vithanage, Vasanthe, Wearing, Alan, Webb, Richard, & Frost, Ray L. (2003) Identification of intracellular calcium oxalate crystals in Chamelaucium uncinatum (Myrtaceae). Australian Journal of Botany, 51(5), pp. 565-572.

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Intracellular inclusions in the pedicel and calyx-tube tissues of Chamelaucium uncinatum Schauer (Myrtaceae) flowers are irregular in shape. They were shown, by polarised light and scanning electron microscopy, to be birefringent 8.9–29.5 μm druse (i.e. aggregate) crystals. Energy-dispersive X-ray spectroscopy showed that these crystals were predominantly composed of calcium. Histochemical and acid-solubility tests indicated that the crystals were calcium oxalate. Raman microprobe spectroscopy was used to confirm this chemical identity. The calcium oxalate crystals were located in xylem-vessel lumens and also in parenchyma cells adjacent to vascular tissues. Thus, the crystals may function to regulate soluble calcium concentrations in C. uncinatum tissues near sites where calcium is unloaded from the xylem.

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ID Code: 21839
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1071/BT03035
ISSN: 0067-1924
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2003 CSIRO Publishing
Deposited On: 17 Jun 2009 12:58
Last Modified: 01 Mar 2012 21:55

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