Two <i>Mychonastes</i> isolated from freshwater bodies are novel potential feedstocks for biodiesel production

Microalgae have been considered as ideal feedstocks for biodiesel production but the potential application is still under investigations. Here, eight kinds of microalgae were identified from water samples based on the morphologic and phylogenetic analyses. Among these eight microalgae, two <i>Mychonastes</i> S4 and S15 exhibited relative faster growth rate in the early culture stage and the highest contents of lipids. The two <i>Mychonastes</i> also showed higher C18:1 contents than the two <i>Chlorella</i> which were traditionally considered to be potential species for biodiesel production. As one kind of less researched microalgae, this study suggests <i>Mychonastes</i> should be a potential feedstock for biodiesel production. The application of the microalgal biodiesel still have some limiting factors, however, it is promising based on better lipid extraction technology and more relevant studies.

微藻（microalgae）一直被视为生物柴油生产的理想原料，但其实际应用潜力仍处于研究探索阶段。本研究通过形态学与系统发育分析，从水样中分离鉴定出8种微藻。在这8种微藻中，两株Mychonastes属菌株S4与S15在培养早期展现出相对更快的生长速率，且脂质含量最高。这两株Mychonastes属菌株的C18:1脂肪酸含量也高于传统上被认为具备生物柴油生产潜力的两株小球藻属（Chlorella）菌株。作为一类研究较少的微藻类群，本研究表明Mychonastes属具备成为生物柴油生产原料的潜力。尽管微藻基生物柴油的实际应用仍存在若干限制因素，但依托更先进的脂质提取技术与更多相关研究，其应用前景十分可观。