摘要
海洋寡糖是海洋多糖经过降解得到的一系列寡糖片段,具有独特的分子结构和生物学活性,作为外源诱导物对植物生长及防御反应具有一定的调节作用,是一种新型、天然的植物生长调节剂。海洋寡糖以壳寡糖、褐藻寡糖、琼胶寡糖、卡拉胶寡糖、石莼寡糖等为代表。植物细胞识别海洋寡糖信号分子后,诱发活性氧爆发,引起信号分子传导,激发相关防御基因的表达,诱导植物防御酶活性提高,合成植物抗逆物质,提高植物抗逆能力。从海洋寡糖的种类、作用机制及作用特点3方面阐述了海洋寡糖在植物抗逆诱导方面的研究进展,以期为海洋寡糖在植物抗逆方面的应用研究提供参考。
Marine oligosaccharides degraded from the polysaccharides in marine organisms are a series of oligosaecharide fragments. Marine oligosaeeharides have special molecule structure and biological activity, so they are new-style, natural plant growth regulators, which can be used exogenously to influence plant growth and stress resistance. Main marine ofigosaccharides include ehitosan oligosaceharides, alginate oligosaccharides, agaro- oligosaecharides, carrageenan oligosaccharides and ulva ofigosaccharides, etc. They can hind to the specific receptors located in the plasma membrane and trigger signaling pathways. The activation of these signaling pathways make defensing genes express. Thus, marine oligosaceharides induced the activity of related resistance enzymes, and accumulation of stress resistance compounds, and then can enhance the protection against adversity stress in plants. This paper summarized the kinds of marine oligosaceharides used at present, and the mechanism of plant stress resistance induced by marine oligosaceharides, so as to provide references for the applied research of marine oligosaeeharides in plant stress resistance.
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2016年第4期44-51,共8页
Journal of Agricultural Science and Technology
基金
福建省海洋经济创新发展区域示范支持重点项目(2012FJ12)
国家海洋局海洋公益性行业科研专项(201505026)资助
关键词
海洋寡糖
种类
植物抗逆性
作用机制
marine oligosaccharides
kinds
plant stress resistance
mechnism
