ata-miR166a-3p: Ata-mir166a-3p is a microRNA that has been found to be up-regulated in L21 and J22 compared to J19 [PMC5411081]. It has also been shown to be downregulated under aluminum (Al) stress in barley, specifically targeting the transcripts of homeobox leucine zipper family genes [PMC8704135]. This suggests that ata-mir166a-3p plays a crucial role in coping with Al stress by regulating genes related to cell wall formation and modification in barley [PMC8704135]. Additionally, ata-mir166a-3p is relatively abundant during all grain development stages (RAGS) in wheat and its target genes have multiple functions, including encoding proteins such as SCF proteins, protein kinase 20-like, serine carboxypeptidase, kinesin-2-like protein pollen semisterility 1 (PSS1), and MYB transcription factors [PMC7045451]. It has also been identified as one of the highly abundant miRNAs in wheat grain that are significantly up- or downregulated during grain development [PMC7045451]. These findings highlight the importance of ata-mir166a-3p in various biological processes and its potential role as a regulatory molecule [PMC5411081][PMC8704135][PMC7045451].