Donzella Silvia, Capusoni Claudia, Pellegrino Luisa, Compagno Concetta
Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via L. Mangiagalli 25, 20133 Milan, Italy.
J Fungi (Basel). 2021 Nov 30;7(12):1028. doi: 10.3390/jof7121028.
The possibility to perform bioprocesses with reduced ecological footprint to produce natural compounds and catalyzers of industrial interest is pushing the research for salt tolerant microorganisms able to grow on seawater-based media and able to use a wide range of nutrients coming from waste. In this study we focused our attention on a marine strain (Mo40). We optimized cultivation in a bioreactor at low pH on seawater-based media containing a mixture of sugars (glucose and xylose) and urea. Under these conditions the strain exhibited high growth rate and biomass yield. In addition, we characterized potential applications of this yeast biomass in food/feed industry. We show that Mo40 can produce a biomass containing 45% proteins and 20% lipids. This strain is also able to degrade phytic acid by a cell-bound phytase activity. These features represent an appealing starting point for obtaining biomass in a cheap and environmentally friendly way, and for potential use as an additive or to replace unsustainable ingredients in the feed or food industries, as this species is included in the QPS EFSA list (Quality Presumption as Safe-European Food Safety Authority).
开展生态足迹更小的生物过程以生产具有工业价值的天然化合物和催化剂的可能性，推动了对耐盐微生物的研究，这类微生物能够在以海水为基础的培养基上生长，并能够利用来自废物的多种营养物质。在本研究中，我们将注意力集中在一株海洋菌株（Mo40）上。我们在含有糖（葡萄糖和木糖）和尿素混合物的海水培养基上，于低pH值条件下在生物反应器中优化了培养。在这些条件下，该菌株表现出高生长速率和生物量产量。此外，我们对这种酵母生物量在食品/饲料工业中的潜在应用进行了表征。我们表明，Mo40能够产生含有45%蛋白质和20%脂质的生物量。该菌株还能够通过细胞结合的植酸酶活性降解植酸。这些特性代表了以廉价且环保的方式获得生物量的一个有吸引力的起点，并且有可能用作添加剂或替代饲料或食品工业中不可持续的成分，因为该物种被列入了欧洲食品安全局的QPS名单（质量有保障的安全推定名单）。
