ABA receptors: function and post-translational modifications in plants
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Updated: Jan 19, 2026

Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput
Published on: March 30, 2018
Shaotong Qin1, Qianqian Qin1, Suiwen Hou1
1Gansu Province Key Laboratory of Gene Editing for Breeding, Ministry of Education on Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
Abstract:
The plant hormone abscisic acid (ABA) plays an important role in plant growth, development and abiotic stresses. ABA perception is mediated by its receptors, PYRABACTIN RESISTANCE 1 (PYR1)/PYR1-like (PYL) proteins (collectively referred to as PYLs), which initiate downstream ABA signaling. The functional regulation of PYLs, particularly through post-translational modifications (PTMs) is gradually attracting extensive attention. Here, we have summarized recent advances in research on PTMs of PYL family, highlighting how mechanisms such as phosphorylation, ubiquitination and nitration fine-tune their activity, stability and subcellular localization. We also briefly review the biological function and genetic phenotypes of PYL family, underscoring their central role in ABA signaling and stress adaptive responses in plants. Future studies should address key questions regarding the additional PTMs, specific sites and crosstalk of these PTMs.
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