Master Course in Development of Environmental Processes, Catholic University of Pernambuco, Recife, PE, Brazil.
Molecules. 2011 Mar 15;16(3):2486-500. doi: 10.3390/molecules16032486.
This study concerns the metabolism of polyphosphate in Trichoderma harzianum, a biocontrol agent with innate resistance against most chemicals used in agriculture, including metals, when grown in the presence of different concentrations of cadmium. The biomass production was affected by the concentration of metal used. Control cultures were able to accumulate polyphosphate under the conditions used. Moreover, the presence of cadmium induced a reduction in polyphosphate content related to the concentration used. The morphological/ultrastructural aspects were characterized by using optical and scanning electron microscopy, and were affected by the heavy metal presence and concentration. The efficiency of cadmium removal revealed the potential of the microorganism for use in remediation. The data indicate the potential for polyphosphate accumulation by the fungus, as well as its degradation related to tolerance/survival in the presence of cadmium ions.
本研究关注的是哈茨木霉（Trichoderma harzianum）中多聚磷酸盐的代谢，哈茨木霉是一种具有先天抗逆性的生防剂，能够抵抗农业中使用的大多数化学品，包括金属，当在不同浓度的镉存在下生长时。生物量的产生受到所用金属浓度的影响。在使用的条件下，对照培养物能够积累多聚磷酸盐。此外，镉的存在诱导了与所用浓度相关的多聚磷酸盐含量的减少。利用光学和扫描电子显微镜对形态/超微结构进行了表征，并且受到重金属的存在和浓度的影响。镉去除的效率显示了微生物在修复中的应用潜力。这些数据表明了真菌积累多聚磷酸盐的潜力，以及在镉离子存在下与耐受/生存相关的多聚磷酸盐的降解。
