骆驼经常能够在茫茫沙漠中奇迹般地找到水源。很久以来,人们不明白其中的道理。最近,美国的一项研究结果表明:土壤中链霉菌的基因起到了很大的作用。美国专家说,土地中的一些特殊气味是由土壤中常见的天蓝色链霉菌产生的化学物质土臭素所发出的。他们发现:这种基因能使链霉菌分 Camels often find water miraculously in the vast desert. For a long time, people do not understand the truth. A recent study from the United States showed that genes of Streptomyces in soil play a large role. According to U.S. experts, some of the special smells in the land are emitted by the geosmin which is a chemical produced by Streptomyces coelicolor, a common source of soil. They found: This gene can make Streptomyces points