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Spatial gradients of calcium in the slug of Dictyostelium discoideum

Azhar, M and Saran, Shweta and Nanjundiah, Vidyanand (1995) Spatial gradients of calcium in the slug of Dictyostelium discoideum. In: Current Science (Bangalore), 68 (3). pp. 337-342.

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Abstract

Starved amoebae of D. discoideum aggregate and give rise to a long and thin multicellular structure called the slug. The cells within the slug eventually differentiate according to a simple anterior/posterior dichotomy. This motivates a search for gradients of putative morphogens along its axis. Calcium may be one such morphogen. On the basis of observations made by using the calcium-sensitive fluorescent dyes fura-2 and chlortetracyline, we report that there are spatial gradients in cytoplasmic and sequestered calcium in the slug. Anteriorly located and genetically defined prestalk cells (ecmA/pstA, ecmB/pstAB) contain significantly higher levels of calcium than the prespore cells in the posterior. However, the proportion of 'calcium-rich' cells in the slug is greater than that of the subset of prestalk cells defined by the expression of the ecmA or ecmB genes.

Item Type: Editorials/Short Communications
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Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Department/Centre: Others
Date Deposited: 26 May 2011 06:08
Last Modified: 21 Feb 2014 04:09
URI: http://eprints.iisc.ernet.in/id/eprint/37912

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