Sharma Anket, Zheng Bingsong
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
Plants (Basel). 2019 Jun 26;8(7):190. doi: 10.3390/plants8070190.
Drought stress adversely effects physiological and biochemical processes of plants, leading to a reduction in plant productivity. Plants try to protect themselves via activation of their internal defense system, but severe drought causes dysfunction of this defense system. The imbalance between generation and scavenging of reactive oxygen species (ROS) leads to oxidative stress. Melatonin, a multifunctional molecule, has the potential to protect plants from the adverse effects of drought stress by enhancing the ROS scavenging efficiency. It helps in protection of photosynthetic apparatus and reduction of drought induced oxidative stress. Melatonin regulates plant processes at a molecular level, which results in providing better resistance against drought stress. In this review, the authors have discussed various physiological and molecular aspects regulated by melatonin in plants under drought conditions, along with their underlying mechanisms.
干旱胁迫对植物的生理生化过程产生不利影响，导致植物生产力下降。植物试图通过激活其内部防御系统来保护自身，但严重干旱会导致该防御系统功能失调。活性氧（ROS）的产生与清除之间的失衡会导致氧化应激。褪黑素是一种多功能分子，具有通过提高ROS清除效率来保护植物免受干旱胁迫不利影响的潜力。它有助于保护光合器官并减少干旱诱导的氧化应激。褪黑素在分子水平上调节植物过程，从而使植物对干旱胁迫具有更好的抗性。在这篇综述中，作者讨论了干旱条件下褪黑素在植物中调节的各种生理和分子方面及其潜在机制。
