In some experiments, some scientists used (Chimeric REpressor gene Silencing Technology (CRES-T) for gene silencing and making a loss of function phenotype. (For example, Mimida et al. 2011)

A chimeric repressor was produced by the fusion of a transcription factor to the plant-specific EAR-motif repression domain (SRDX).

What were the reasons for choosing CRES-T over RNAi?