School of Horticulture, Hainan University, Haikou, 570228, China.
School of Management, Hainan University, Haikou, 570228, China.
Plant Physiol Biochem. 2022 Aug 15;185:188-197. doi: 10.1016/j.plaphy.2022.06.004. Epub 2022 Jun 6.
Melatonin is a natural, multifunctional, nontoxic, regulatory, and ubiquitous biomolecule, having low molecular weight and pleiotropic effects in the plant kingdom. It is a recently discovered plant master regulator which has a crucial role under abiotic stress conditions (salinity, drought, heat, cold, alkalinity, acid rain, ozone, and metals stress). In the solanaceous family, the tomato is highly sensitive to abiotic stresses that affect its growth and development, ultimately hampering production and productivity. Melatonin acts as a strong antioxidant, bio-stimulator, and growth regulator, facilitating photosynthesis, delaying leaf senescence, and increasing the antioxidant enzymes system through direct scavenging of reactive oxygen species (ROS) under abiotic stresses. In addition, melatonin also boosts morphological traits such as vegetative growth, leaf photosynthesis, root architecture system, mineral nutrient elements, and antioxidant activities in tomato plants, confirming their tolerances against salinity, drought, heat, cold, alkalinity, acid rain, chemical, pathogen, and metals stress. In this review, an attempt has been made to summarize the potential role of melatonin for tomato plant endurance towards abiotic stresses, along with the known relationship between the two.
褪黑素是一种天然的、多功能的、无毒的、调节性的、无处不在的生物分子，分子量低，在植物界具有多种效应。它是一种最近发现的植物主要调节剂，在非生物胁迫条件下（盐度、干旱、热、冷、碱性、酸雨、臭氧和金属胁迫）起着关键作用。在茄科家族中，番茄对影响其生长和发育的非生物胁迫高度敏感，最终会阻碍生产和生产力。褪黑素作为一种强大的抗氧化剂、生物刺激剂和生长调节剂，通过直接清除活性氧（ROS），促进光合作用，延缓叶片衰老，并增加抗氧化酶系统，从而在非生物胁迫下发挥作用。此外，褪黑素还能促进番茄植株的形态特征，如营养生长、叶片光合作用、根系结构系统、矿质营养元素和抗氧化活性，从而提高其对盐度、干旱、热、冷、碱性、酸雨、化学物质、病原体和金属胁迫的耐受性。在这篇综述中，我们试图总结褪黑素对番茄植物耐受非生物胁迫的潜在作用，以及两者之间的已知关系。
