AYG addition caused the highest induction and repression levels for genes pox3 and poxa1b respectively.
In term of the number of genes, there appeared to be a balance between induction and repression in the leaf, while repression was primarily observed in the root (Additional file 1: Figure S3).
But to some extent, it was reported that the regulation of cellulases was mediated by induction and repression of the genes that control the expression of cellulose-degrading enzymes [33,34].
With the advances in understanding biosynthetic pathways, elucidation of regulatory mechanisms related to induction and repression of genes, as well as bioengineering design, it will be possible to apply new strategies and limitless combinations for isolating improved strains.
It is generally accepted that the soil enzyme activity is predominantly extracellular, and therefore not directly related to the microbial metabolic activity; however, the induction and repression of the soil enzymatic activity upon the availability of organic substrates and end products, respectively has been often reported in the rhizosphere and bulk soil (e.g. [106, 107]).
From zymogram and enzyme activity studies, the induction and repression of each enzyme variant and their probable correlation with the enzyme activities as discussed in this report strongly suggest the significant effect of biomass on the corresponding enzyme activities and was clearly demonstrated in Table 1.
This was done independently for induction and repression experiments.
Secondly, it facilitates rapid induction and repression kinetics as well as multiple cycles of induction and repression.
Induction and repression of the mRNA slightly preceded the observed variations in promoter activity.
The groups differed, however, in the magnitude of IRG induction and repression, both of which, surprisingly, were exaggerated in PRs.
The average expression changes for these two spacing parameters were 1.04 and −1.77 for induction and repression data respectively.
