脱落酸调控种子休眠和萌发的分子机制

脱落酸(ABA)是调控种子休眠和萌发过程的主要植物激素。种子内源ABA含量和种胚对ABA敏感性共同调控种子休眠和萌发过程, 确保植物种子以休眠状态在逆境中保持其自身繁衍能力, 并在适宜的环境下启动萌发程序。种子ABA合成代谢和ABA信号转导途径涉及许多重要基因家族, 它们通过复杂的调控网络精确地控制着种胚发生、种子成熟、休眠及萌发进程。该文对ABA调控种子休眠和萌发的分子机制最新研究进展进行综述, 并展望了今后的研究方向。

Molecular Mechanism of Abscisic Acid Regulation During Seed Dormancy and Germination

Abscisic acid (ABA) acts as a major phytohormone in regulating seed dormancy and germination. Endogenous ABA level in the seed and embryo sensitivity to ABA jointly regulate the seed dormancy and germination processes, ensuring that the dormant seed can maintain self-reproductive ability under adverse situations and germinate under optimal conditions. A number of key genes are involved in regulating the ABA metabolism and signaling transduction pathway, and these genes accurately control the processes of embryogenesis, seed maturation, dormancy, and germination via a complicated regulation network. In this paper, we review the latest research in the molecular mechanism of ABA-regulated seed dormancy and germination and pinpoint prospects for future research.