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A considerable amount of evidence suggests that metabolism of germinants or metabolism stimulated by them is involved in triggering bacterial-spore germination. On the assumption that such a metabolic trigger might lead to relatively small biochemical changes in the first few minutes of germination, sensitive analytical techniques were used to detect any changes in spore components during the L-alanine-triggered germination of Bacillus megaterium KM spores. These experiments showed that no changes in spore free amino acids or ATP occurred until 2-3 min after L-alanine addition. Spores contained almost no oxo acids (pyruvate, alpha-oxoglutarate, oxaloacetate), malate or reduced NAD. These compounds were again not detectable until 2-3 min after addition of germinants. It is suggested, therefore, that metabolism associated with these intermediates is not involved in the triggering of germination of this organism.

biochemical journal

Metabolism and the triggering of germination of <i>Bacillus megaterium</i>. Concentrations of amino acids, organic acids, adenine nucleotides and nicotinamide nucleotides during germination

Metabolism and the triggering of germination of Bacillus megaterium. Concentrations of amino acids, organic acids, adenine nucleotides and nicotinamide nucleotides during germination