Abscisic acid regulates iron accumulation in plant seeds via the PYLs–bHLH IVc–YSLs module

Proceedings of the National Academy of Sciences, Volume 122, Issue 45, November 2025. SignificanceFe is essential for plant growth and human nutrition, yet its accumulation must be tightly regulated to avoid toxicity. We uncover a dual role of abscisic acid (ABA) in balancing seed Fe homeostasis: ABA inhibits Fe transport via the PYLs–bHLH …