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Light exposure impacts several aspects of Drosophila development including the establishment of circadian rhythms, neuroendocrine regulation, life-history traits, etc. Introduction of artificial lights in the environment has caused almost all animals to develop ecological and physiological adaptations. White light which comprises different lights of differing wavelengths shortens the lifespan in fruit flies Drosophila melanogaster. The wavelength-specific effects of white light on Drosophila development remains poorly understood. In this study, we show that different wavelengths of white light differentially modulate Drosophila development in all its concomitant stages when maintained in a 12-h light: 12-h dark photoperiod. We observed that exposure to different monochromatic lights significantly alters larval behaviours such as feeding rate and phototaxis that influence pre-adult development. Larvae grown under shorter wavelengths of light experienced an altered feeding rate. Similarly, larvae were found to avoid shorter wavelengths of light but were highly attracted to the longer wavelengths of light. Most of the developmental processes were greatly accelerated under the green light regime while in other light regimes, the effects were highly varied. Interestingly, pre-adult survivorship remained unaltered across all light regimes but light exposure was found to show its impact on sex determination. Our study for the first time reveals how different wavelengths of white light modulate Drosophila development which in the future might help in developing non-invasive therapies and effective pest measures. [ABSTRACT FROM AUTHOR]

The article deals with the structure and semantics of color elements in the poetic texts by David Samoylov. Colorism manifests itself in three ways: as a color image recreated from the context, as substituted metonymy, and as words denoting color semantics. In this paper, using a continuous sample, the mechanism of manifestations of the basic monochromes "black - white" and the contaminated metatricolor "blue - green - red" is investigated on the basis of a complete collection of Samoylov's poems. As a result of the article, a frequency dictionary of color elements was created, a semantic and structural analysis of five color images was carried out, and an ideological and thematic complex of the poet's poetry was determined. [ABSTRACT FROM AUTHOR]

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