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[en] Daphniopsis tibetana Sars lives in elevation, usually with strong solar UV radiation. We speculate that UV may have an effect on the ecology and evolutionary biology of this species. However, the regulatory effect and mechanism of UV on D. tibetana have not been studied previously. Here, our results showed that UVB could act as a positive factor in the relative body lengths, reproductive parameters, and population growth parameters of D. tibetana when UVB radiation is 20–170 mJ cm−2, compared with the control group. Strikingly, these parameters were highest at 120 mJ cm−2. To explore the mechanism underlying the UVB irradiation effects, we conducted a transcriptome analysis using the Trinity platform. The results indicated that differentially regulated genes were mostly enriched in lipid transport and lipid localization by Gene Ontology (GO) enrichment analysis of 146 differentially expressed genes (83 upregulated and 63 downregulated). This is the first study of UVB radiation of D. tibetana to reveal genes that may have crucial roles in survival, growth, and reproduction and could be candidates for future functional studies. Additionally, the study could supply a substantial resource for investigating and elucidating lipids that could play important roles in a physiological context.
[en] The simultaneous generation of random lasing and a supercontinuum is demonstrated, where random lasing emission is realized in a completely-opened fiber structure without any resonance, and its wavelength lies in the anomalous dispersion region of a nonlinear fiber. As a result, a forward supercontinuum with a 20 dB bandwidth of ∼200 nm is obtained experimentally. This study provides the simplest structure for the simultaneous generation of pump lasing (random lasing acts as a pump for supercontinuum generation) and a supercontinuum, benefiting from the natural simplicity of completely-opened random fiber laser, and may result in novel supercontinuum sources with excellent reliability and lifetime. (letter)