Study on the morphology and composition of potato starch in Tibet
The particle size distribution,microscopic particle morphology and amylose and amylopectin contents of potato starch from different producing areas in Tibet were determined by particle size distribution instrument,scanning electron microscope and ultravio-let dual wavelength method,and compared with the commercial potato starch and those of potato starch from different producing areas in China's mainland.The results showed that the particle size and micromorphology of potato starch in Tibet were not significantly dif-ferent from those in the market and the mainland.The average amylose content of Tibetan potato starch was 36.73%and the average amylopectin content was 45.87%.The average amylose content of commercial potato starch was 30.76%and the average amylopectin content was 49.94%.The average amylose content of potato starch in China's mainland was 31.73%,and the average amylopectin con-tent was 46.80%.Compared with the potato starch in the market and China's mainland,the amylose content of potato starch in Tibet was significantly increased(P<0.001),and the content of amylopectin was significantly decreased(P<0.05).The composition of pota-to starch in Tibet was significantly different from that in the market and China's mainland,which provided an experimental basis for the high-value development of potato starch in Tibet.
NETL
NSTL
万方数据
