Afterwards,internal lactonization on the C5 hydroxyl group with the carboxylic
group of the same molecule gives rise to 6-PP production. The
significant decrease in 6-PP production may be correlated to the fact
that the high concentration of 6-PP may activate the fungi metabolism
to reduce this concentration as a defense metabolism to avoid its toxic
effect [11,13,28]. On the other hand 6-PP may be transformed into
other compounds as mentioned before.