Calcium in electron-dense globoids during pollen grain maturation in Chlorophytum elatum R.Br. |
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| Authors: | R Butowt M I Rodríguez-García J D Alché A Gorska-Brylass |
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| Institution: | (1) Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín (CSIC), E-18008 Granada, Spain, ES;(2) Institut for Plant Breeding and Acclimatization, Powst. Wielkopolskich 10, 85–950 Bydgoszcz, Poland, PL;(3) Department of Plant Cytology and Embryology, Institute of Biology, Copernicus University, PL-87-100 Torun, Poland, PL |
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| Abstract: | The localization, elemental composition and quantitative changes in insoluble, electron-dense globoids observed in the course
of pollen grain development in Chlorophytum elatum R.Br. have been investigated. During pollen maturation, small electron-dense globoids were only found within larger electron-light
vesicles in the cytoplasm of the vegetative cell. The number and diameter of the electron-dense globoids increased during
pollen grain maturation, and decreased after pollen germination. By energy-dispersive X-ray microanalysis, the presence of
calcium, magnesium and phosphorus was detected in these globoids. The results are discussed in the light of previous findings
with regard to phytate metabolism and the role of calcium in pollen germination.
Received: 28 December 1996 / Accepted: 7 May 1997 |
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| Keywords: | : Calcium (pollen germination) Chloro-phytum (pollen maturation) Globoid (electron dense) Phytate metabolism Pollen grain maturation |
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