Screening High-zinc-enriched Strains From Natural Environment and Study on its Bioavailability in Ra

• 作 者: Zhang Xin-guo Peng yi-nan Zhang Chun-sheng Liu Yin-juan Lu Ying Wang ming-gang
• 机 构: School of Life Science and Engineering,Lanzhou university of technology,Gansu,730050,P.R.China
• 出 处: 第五届全国微生物资源学术暨国家微生物资源平台运作服务研讨会
• 发表日期: 2013年10期
• 关键词: high-zinc-enriched strain Screening and Isolation Identification bioavailability

　　Zinc is one of the demand essential elements and its deficiency is a critical nutritional and health problem in the world.The organic forms of trace element are considered more bioavailable than the inorganic ones.It is a very important attempt and choice to obtain bound organic zinc by microorganism transformation.Therefore, twenty-two strains which tolerated high zinc were screened and isolated from natural environment, and only one strain No.LZ-1108 grew well with 10,000μtg/mL zinc(Ⅱ).According to morphological, 18S rDNA sequence analysis, biophysical and biochemical characteristics, No.LZ-1108 is identified as Fusarium oxysporum.The cells zinc content in No.LZ-1108 was 6.7mg/g dry cell.The bioavailability in rats confirmed that No.LZ-1108 had higher absorption efficiency than gluconate zinc.Our study would bring new ideas for finding new zinc supplements from natural environment.