Calcium gradients in tip growing plant cells visualized by chlorotetracycline fluorescence |
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Authors: | Hans-Dieter Reiss Werner Herth |
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Affiliation: | (1) Zellenlehre, Universität Heidelberg, Im Neuenheimer Feld 230, D-6900 Heidelberg, Federal Republic of Germany |
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Abstract: | With chlorotetracycline (CTC)-fluorescence a tip-to-base Ca2+ gradient is visualized in all tested, tip-growing plant cells: pollen tubes of Lilium longiflorum, root hairs of Lepidium sativum, moss caulonema of Funaria hygrometrica, fungal hyphae of Achlya and in the alga Acetabularia mediterranea. The fluorescence gradients in the different species vary in intensity and extension. Sometimes a punctate mobile CTC-fluorescence, in the size range of mitochondria, is observed. Bursting cells lose their fluorescence rapidly, indicating a cytoplasmic localization of the gradient. Only in Acetabularia is the wall also fluorescent with CTC. The results are interpreted as evidence for a general role of a calcium gradient in tip growth.Abbreviation CTC chlorotetracycline |
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Keywords: | Ca2+ gradient Cells (tip growth) Chlorotetracycline-fluorescence Growth (tip) Tip growth |
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