摘要
褪黑素广泛存在于植物体内,对植物生长和发育方面有着重要的作用。其中,最为人们关注的是褪黑素在植物抵御干旱、高盐、极端温度和氧化胁迫等不良影响中所发挥的重要功能。随着人们对褪黑素研究的深入,褪黑素在植物体中发挥的作用和功能也更加明确,国内外在褪黑素与植物抗逆性关系的研究也取得了丰硕的成果。主要从植物体中褪黑素的合成途径、褪黑素在植物抗性反应中的作用以及内源褪黑素含量与逆境等方面进行了综述,并提出今后的研究方向。可以归纳为:植物体内褪黑素的合成机制与动物体内相似,但是确切的生物合成途径和具体的合成位点尚未明确;外源褪黑素处理能够增强植物抵御逆境的能力;逆境胁迫能够促进植物自身合成褪黑素,过表达褪黑素合成相关基因能够增加植物体内褪黑素的含量。
Evidence has confirmed that the presence of melatonin in plants is universal. Melatonin has importance roles in many aspects of plant growth and development. The most frequently mentioned functions of melatonin are related to abiotic stresses such as drought, salt stress, extreme temperature, and oxidative stresses. Nowadays, with understanding deepening of melatonin, studies about the effect of melatonin on abiotic stresses resistance in plants have made plentiful and substantial achievements. This review mainly focuses on the biosynthesis pathway of melatonin, exogenously applied melatonin affects stress tolerance and melatonin levels in plants under stress conditions, and also proposes the potential subjects of melatonin in plant. The findings are as follows, although it has been suggested that plant melatonin is synthesized via similar biosynthetic pathways to those in animals, the exact biosynthetic pathway and the specific sites remain unclear. Evidence indicates that exogenously applied melatonin can also improve abiotic stress resistance in plants. Environmental stress can enhance the level of endogenous melatonin in plants, and overexpression of the melatonin biosynthetic genes can also increase melatonin levels.
出处
《生物技术通报》
CAS
CSCD
北大核心
2015年第4期47-55,共9页
Biotechnology Bulletin
基金
安徽省农业科学院院长青年基金项目(14B0945
12B0919)
关键词
褪黑素
非生物逆境
氧化胁迫
抗逆性
抗氧化剂
melatonin
abiotic stress
oxidative stress
stress resistance
antioxidant
