Abstract
AbstractEffect of auxin and gibberellic acid on sporulation of a yeast, Saccharomyces ellipsoideus, was studied. When added to the sporulation media, gibberellic acid promoted sporulation. The sporulation rate was higher in the medium SGV with vitamins than in the vitamin‐free SG, but the effect of gibberellic acid was more pronounced in the latter. Auxin (IAA, 2,4‐D, and NAA) inhibited sporulation in SGV, but promoted it in SG. This sporulation‐promoting effect of IAA was reversed by an antiauxin, 2,4,6‐T.Preculturing in the presence of added IAA increased sporulation. Added to the preculture medium, gibberellic acid alone showed little effect on sporulation, but in combination with IAA it enhanced sporulation conspicuously.IAA and gibberellic acid were effective in sporulation promotion only when added before the nuclear enlargement occurred in sporulation culture.
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