SUMMARY: The germination rate of spores and the manner in which it is influenced by pH, sodium ion concentration and temperature differ according to the organic germinant used. Only L-alanine initiated germination when present alone. The germination rate with optimal L-alanine was increased by L-phenylalanine, L-arginine, L-histidine or L-lysine but not by other common amino acids or L-lactate. With suboptimal concentrations of L-alanine, addition of L-lactate, L-arginine or L-phenylalanine increased the germination rate more than an equal concentration of L-alanine. The mechanisms whereby L-phenylalanine and L-arginine stimulate germination appear to be different from those involved when L-alanine or L-lactate are the germinants.


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