[Degradation of phytic acid in rapeseed meal by two strains of molds].
By using selective media, two strains of molds which are able to degrade phytic acid were isolated from soil samples. These molds are able to use inositol as the sole carbon and energy sources for growth. In broth cultures, the degradation rates of phytic acid by these molds were 74.4% and 95.0%, respectively. However, in solid-state fermentation which used rapeseed meal as a raw material, the degradation rate was about 40%. Several metal ions tested were able to enhance the degradation rate of phytic acid. Factors such as temperature, pH and moisture content which affect the growth of molds were also explored. These two strains of molds were initially identified as Paecilomyces sp. and Penicillium sp.. They do not produce any detectable amount of aflatoxins.
Xiang
W
W
Department of Biochemistry, School of Life Sciences, Zhongshan University, Guangzhou 510275.
Zhong
Y
Y
D001673:Biodegradation, Environmental; D029741:Brassica rapa; D003470:Culture Media; D005285:Fermentation; D010143:Paecilomyces / Q000302:isolation & purification / Q000378:metabolism*; D010407:Penicillium / Q000302:isolation & purification / Q000378:metabolism*; D010833:Phytic Acid / Q000378:metabolism*; D012988:Soil Microbiology
D003470:Culture Media; D010833:Phytic Acid