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首页> 美国卫生研究院文献>Molecules >Production and Characterization of Bioplastic by Polyhydroxybutyrate Accumulating Erythrobacter aquimaris Isolated from Mangrove Rhizosphere
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Production and Characterization of Bioplastic by Polyhydroxybutyrate Accumulating Erythrobacter aquimaris Isolated from Mangrove Rhizosphere

机译：聚羟基丁酸积累红树林根际分离的水红细胞产生和表征生物塑料。

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摘要

The synthesis of bioplastic from marine microbes has a great attendance in the realm of biotechnological applications for sustainable eco-management. This study aims to isolate novel strains of poly-β-hydroxybutyrate (PHB)-producing bacteria from the mangrove rhizosphere, Red Sea, Saudi Arabia, and to characterize the extracted polymer. The efficient marine bacterial isolates were identified by the phylogenetic analysis of the 16S rRNA genes as , , , and . The optimization of PHB accumulation by was achieved at 120 h, pH 8.0, 35 °C, and 2% NaCl, using glucose and peptone as the best carbon and nitrogen sources at a C:N ratio of 9.2:1. The characterization of the extracted biopolymer by Fourier-transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (NMR), and Gas chromatography-mass spectrometry (GC-MS) proves the presence of hydroxyl, methyl, methylene, methine, and ester carbonyl groups, as well as derivative products of butanoic acid, that confirmed the structure of the polymer as PHB. This is the first report on as a PHB producer, which promoted the hypothesis that marine rhizospheric bacteria were a new area of research for the production of biopolymers of commercial value.
机译：从海洋微生物合成生物塑料在可持续生态管理的生物技术应用领域中占有很大的份额。这项研究旨在从沙特阿拉伯红海红树林的根际圈中分离出新的产聚β-羟基丁酸酯（PHB）细菌的菌株，并对提取的聚合物进行表征。通过对16S rRNA基因的系统发育分析，确定了有效的海洋细菌分离株，，和。使用葡萄糖和蛋白as作为最佳碳源和氮源，C：N为9.2：1，在120 h，pH 8.0、35°C和2％NaCl的条件下实现了PHB的最优化积累。通过傅立叶变换红外光谱（FTIR），核磁共振（NMR）和气相色谱-质谱（GC-MS）对提取的生物聚合物进行表征，证明存在羟基，甲基，亚甲基，次甲基和酯羰基，以及丁酸的衍生物，证实了该聚合物的结构为PHB。这是关于PHB生产者的第一份报告，它提出了这样的假说，即海洋根际细菌是生产具有商业价值的生物聚合物的新研究领域。

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