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811.
Green, blue and violet colours of Lycaenidae examined by us — with the exception of Rapala arata (Theclinae) — are due to iridescent scales which are arranged before a dark background. The iridescent scales are constructed according to the Urania-type and may be diverted from pigmented scales by laying in equidistant lamellae and little cuticular bars, which maintain the distance between the lamellae. The ribs in the longitudinal axis of the scales contain lamellae and bars only in the Plebejinae, in Lycaeninae and Theclinae they are small and sit on the plain upperside of the scale with a narrow base.
Mit Unterstützung durch die Deutsche Forschungsgemeinschaft 相似文献
Mit Unterstützung durch die Deutsche Forschungsgemeinschaft 相似文献
812.
Belinda C. Martin Jen A. Middleton Matthew W. Fraser Ian P. G. Marshall Vincent V. Scholz Bertram Hausl Hannes Schmidt 《The ISME journal》2020,14(11):2901
Seagrasses and lucinid bivalves inhabit highly reduced sediments with elevated sulphide concentrations. Lucinids house symbiotic bacteria (Ca. Thiodiazotropha) capable of oxidising sediment sulphide, and their presence in sediments has been proposed to promote seagrass growth by decreasing otherwise phytotoxic sulphide levels. However, vast and productive seagrass meadows are present in ecosystems where lucinids do not occur. Hence, we hypothesised that seagrasses themselves host these sulphur-oxidising Ca. Thiodiazotropha that could aid their survival when lucinids are absent. We analysed newly generated and publicly available 16S rRNA gene sequences from seagrass roots and sediments across 14 seagrass species and 10 countries and found that persistent and colonising seagrasses across the world harbour sulphur-oxidising Ca. Thiodiazotropha, regardless of the presence of lucinids. We used fluorescence in situ hybridisation to visually confirm the presence of Ca. Thiodiazotropha on roots of Halophila ovalis, a colonising seagrass species with wide geographical, water depth range, and sedimentary sulphide concentrations. We provide the first evidence that Ca. Thiodiazotropha are commonly present on seagrass roots, providing another mechanism for seagrasses to alleviate sulphide stress globally.Subject terms: Microbial ecology, Plant ecology, Soil microbiology 相似文献
813.
Hannes Link Bernd Anselment Dirk Weuster-Botz 《Metabolomics : Official journal of the Metabolomic Society》2008,4(3):240-247
Effective and rapid inactivation of cellular metabolism is a prerequisite for accurate metabolome analysis. Cold methanol
quenching is commonly applied to stop any metabolic activity and, at the same time remaining the cells’ integrity. However,
it is reported that especially prokaryotic cells like Escherichia coli and Corynebacterium glutamicum tend to leak intracellular metabolites during cold methanol quenching. In this work leakage of adenylates is quantified for
different quenching fluids. Further, a methanol/glycerol based quenching fluid is proposed, which reduces leakage drastically
compared to the commonly applied methanol/water solution (16% ATP leakage compared to more than 70%). 相似文献
814.