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首页> 外文期刊>Acta Biochimica Polonica >Wheat straw degradation and production of alternative substrates for nitrogenase of Rhodobacter sphaeroides
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Wheat straw degradation and production of alternative substrates for nitrogenase of Rhodobacter sphaeroides

机译：小麦秸秆降解及球形红球菌固氮酶替代底物的生产

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摘要

Cellulose is a major component of plant biomass and could be applied in the production of biofuels, especially bioethanol. An alternative approach is production of a clean fuel - hydrogen from cellulosic biomass. In this paper an innovatory model of cellulosic waste degradation has been proposed to verify the possibility of utilization of cellulose derivatives by purple non-sulfur bacteria. The concept is based on a two-step process of wheat straw conversion by bacteria in order to obtain an organic acid mixture. In the next stage such products are consumed by Rhodobacter sphaeroides, the known producer of hydrogen. It has been documented that Cellulomonas uda expresses cellulolytic activity in the presence of wheat straw as an only source of carbon. R. sphaeroides applied in this research can effectively consume organic acids released from straw by C. uda and Lactobacillus rhamnosus and is able to grow in the presence of these substrates. Additionally, an increased nitrogenase activity of R. sphaeroides has been indicated when bacteria were cultivated in the presence of cellulose derivatives which suggests that hydrogen production occurs.
机译：纤维素是植物生物质的主要成分，可用于生产生物燃料，尤其是生物乙醇。另一种方法是生产清洁燃料-由纤维素生物质制氢。本文提出了一种纤维素废料降解的创新模型，以验证紫色非硫细菌利用纤维素衍生物的可能性。该概念基于通过细菌转化小麦秸秆的两步过程，以获得有机酸混合物。在下一阶段，此类产品被已知的氢气生产商球形红细菌（Rhodobacter sphaeroides）消耗。据报道，在小麦秸秆作为唯一碳源的情况下，棉纤维单胞菌表达纤维素分解活性。在这项研究中应用的球形红球菌可以有效地消耗乌达氏杆菌和鼠李糖乳杆菌从稻草中释放的有机酸，并且能够在这些底物的存在下生长。另外，当在纤维素衍生物存在下培养细菌时，已经表明球形红球菌的固氮酶活性增加，这表明发生了氢的产生。

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