ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of Aspergillus flavus strains on aflatoxin and bright greenish yellow fluorescence of corn kernels.

WICKLOW, D.T.

Plant Disease 83 : 1146-1148.

1999

บทคัดย่อ

The diversity of a naturally occurring population of Aspergillus flavus isolated from a corn field in Illinois, and their ability to contaminate grain with aflatoxin and produce bright greenish yellow fluorescent (BGYF) kernels was investigated in 1996 and 1998. The 19 strains included 16 genotypes representing both aflatoxin producers and non-producers.  Ears of corn hybrid Pioneer 3394 in the late –milk to early –dough stage of maturity were inoculated with each A. flavus strain using a toothpick wound procedure.  At harvest, 20 to 24 of the kernels nearest to each wounded site were separated into three categories : wound inoculated kernels, intact BGYF kernels and all other intact kernels.  Removal of the individual wound inoculated kernels and the intact BGYF kernels from corn ears inoculated with 13 aflatoxin producing strains of A.flavus lowered mean aflatoxin values from 115 to 2 g/kg in 1996 and from 744 to 33 g/kg in 1998. Results indicated substantial variation among A.flavus genotypes in their ability to produce aflatoxin in the germ and endosperm of infected BGYE kernels.