Two birds with one stone: CEPR2 phosphorylates dual targets in ABA signaling

• 作者: Qianying Yang Youngsook Lee
• 来源期刊: 分子植物（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Spotlight
• 页码范围: 550-551
• 页数: 2页
• 语种: 英文

摘要

Abscisic acid (ABA) is a major phytohormone that governs plant development and their responses to many stressors (Chen et al., 2020).After its biosynthesis in specific tissues and ceils, ABA is transported throughout the plant and perceived by dedicated receptors.The PYR/PYL/RCAR (pyrabactin resistance1/PYR1-like/regulatory components of ABA receptor) proteins are such ABA receptors and are localized inside the cell.Due to their location, and since ABA is often biosynthesized far from its target cells, ABA transporters are needed to move the phytohormone from the cells that synthesize ABA to the target cells.Several ABA transporters from various protein families have been reported over the years: ABC (ATP-binding cassette), NPF (NITRATE TRANSPORTER1 [NRT1]/PEPTIDE TRANS-PORTER [PTR] FAMILY), and DTX/MATE (detoxification efflux carriers/muitidrug and toxic compound extrusion) transporters (Kang et al., 2020).Thus, three steps constitute the major framework of ABA signaling and control the diverse physiological and developmental effects of ABA: synthesis (mediated by enzymes), transport (mediated by transporters), and perception (mediated by receptors).