Silencing of miR169a improves drought stress by enhancing vascular architecture, ROS scavenging, and photosynthesis of <i>Solanum tuberosum</i> L.

ABSTRACT: Vascular bundles regulate water balance, nutrient uptake and transport, and stress responses, ultimately influencing the yield and quality of crops. However, our understanding of the genetic functions of microRNAs (miRNAs) during vascular development remains limited. In this research, the role of miR169a in potatoes was studied. Silencing StmiR169a in potatoes promoted vascular bundle formation, resulting in not only upright and robust stems but also longer roots and more extensive root systems. Histological analysis revealed a significant increase in the number of xylem vessels in the vascular bundles of stems and roots of RNAi-mediated miR169a lines (STTM169). Silencing miR169a led to higher water use efficiency, enhanced photosynthesis rates, elevated enzymatic antioxidant activity, and

SUBMITTER: Lei Z 

PROVIDER: S-EPMC11965352 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature