Marine sediments, as a reservoir of adsorbed nutrients and hazardous materials, harbor a big amount of microorganisms which act an important role in the biogeochemical cycles and b ioremediation o fpo
Serious nitrogen (N) deposition in terrestrial ecosystemscauses soil acidificationand changes the structure and function of the microbial community.However, itis unclearhow these changes aredependent
Understanding the biodiversity, spatial patterns of organisms and the underlying mechanisms shaping biotic communities is a central goal in communit ecology.Here, we describe taxa-area relationships(T
本研究采用Locked Nucleic Acid (LNA) oligonucleotide-PCR Clamping(锁核苷酸PCR)技术抑制植物内生细菌DNA扩增过程中源于植物细胞器SSU rRNA基因扩增带来的干扰;同时结合高通量测序技术解析了大豆和玉米根部内生细菌群落结构多样性.结果表明,在应用LNA扩增的植物样品中测得的基因序列基本上来源于内生细菌,而未应用LNA的样品来源于叶绿体的序列
Anaerobic digestion of cow manure at 30 ℃ for increasing biogas production was studied in two-stage bioreactor configuration consisting of continuously stirred tank reactor (CSTR) and internal circula
人为活动导致的CO2等温室气体排放增多加速了全球气候变化.土壤微生物代谢活动会影响陆地与大气间的碳交换,进而改变全球碳库.然而,目前关于土壤微生物群落对大气CO2浓度上升的反馈机制仍研究较少.本研究利用第四代基因芯片技术,结合多种传统宏基因组学学统计方法和分子生态网络分析,从微生物群落功能结构的角度探究了在多种混合植被条件下(植物物种数为4),土壤微生物整体功能及其驱动的碳、氮循环对大气CO2浓度
反刍动物的瘤胃中含有完善的纤维素降解微系统,系统中存在的微生物能够对纤维素进行有效的降解并生成甲烷.本实验以瘤胃胃液为接种源,以小麦秸秆为发酵底物,在控制发酵温度为37℃恒温条件下,研究不同接种物比例对厌氧发酵产气特性的影响.结果显示随着接种量的增加甲烷产量逐渐升高,当接种量为9％时,甲烷积累产量达到最大值为2676ml (0.73 L/g TS),最高日产气量为154ml,甲烷含量为54.9％;
Five dihydrochalcones including phlorizin, trilobatin, 3-hydroxyphloridzin, sieboldin (3-hydroxytrilobatin) and phloretin 2-xyloglucoside were isolated from the fruit of Malus Red Splender.The chemica
This work determines and analyzes methanol extracts from Malus domestic flowers at two stages of flowering.The initial flowering extract had more proximate, mineral and amino acid contents and also ri
The content of organic matter in soil often affects plant growth which can be reflected by photosynthetic capacity, such as gas exchange and chlorophyll fluorescence.The main objective of the research