Abstract
To determine the influence of carotenoids on UV sensitivity of Neurospora crassa conidia, the dose-response curves of 3 albino strains were compared to that of the wild type. In a control experiment the genetic background effects were eliminated by irradiating the wild type in which carotenoid synthesis had been inhibited by β-ionone, and comparing the dose-response curve to that of untreated wild type. All strains used had similar γ-ray survival curves and nuclei per conidium which precluded differences in UV sensitivity due to morphological differences. The albinos and β-ionone-treated strains showed a greater sensitivity (mean LD50 4.35·103 erg/mm2) to UV irradiation than the wild type (LD50 7.30·103 erg/mm2).
Published Version
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