Transient abRNA and steady-state mRNA levels set the thresholds for sense PTGS initiation and amplification
Post-transcriptional gene silencing (PTGS) is a conserved RNA-based defense mechanism that protects plants against viruses and other invasive nucleic acids (Tan et al. 2020). During PTGS, double-stranded RNAs (dsRNAs) are processed by DICER LIKE 4 (DCL4) and DCL2 into 21-and 22-nucleotide small interfering RNAs (siRNAs...