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Abstract ▼ AI-Helper

In order to see the single effect and interaction of potassium chloride(KCI) and calcium the chloride ($CaCl_2$) on the development of Drosophila melanogaster, the emergence rates of the five strains of the flies were examined from the media containing 0.0M, 0.5M, 0.1M, 0.2M, of $CaCl_2$ or KCI plus...

In order to see the single effect and interaction of potassium chloride(KCI) and calcium the chloride ($CaCl_2$) on the development of Drosophila melanogaster, the emergence rates of the five strains of the flies were examined from the media containing 0.0M, 0.5M, 0.1M, 0.2M, of $CaCl_2$ or KCI plus various concentrations of KCI or $CaCl_2$, and the results are presented as follows: 1. The emergence rate of D. melanogaster is not significantly different among strains but strikingly different among concentrations of KCI or $CaCl_2$; the emergence rate decreases as concentration of KCI or $CaCl_2$ increases. 2. The inhibitory effect of $CaCl_2$ on the emergence rates is greater than that of KCI, implying that the resistibility of the flies to KCI is greater than to $CaCl_2$. 3. The addition of small amount of $CaCl_2$ or KCI to KCI or $CaCl_2$ media counteracts the inhibitory effect of KCI or $CaCl_2$, but the addition of a little greater amounts of $CaCl_2$ or KCI to the KCI or $CaCl_2$ media enhance the inhibitory effect of the salts. 4. Thus, there may be some interaction of $K^+$ and $Ca^++$ ions in the inhibitory effect on the development(emergence rates) of Drosophila melanogaster.