关键词: 海洋寡糖, 种类, 植物抗逆性, 作用机制

Abstract: Marine oligosaccharides degraded from the polysaccharides in marine organisms are a series of oligosaccharide fragments. Marine oligosaccharides 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 oligosaccharides include chitosan oligosaccharides, alginate oligosaccharides, agaro-oligosaccharides, carrageenan oligosaccharides and ulva oligosaccharides, etc. They can bind 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 oligosaccharides 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 oligosaccharides used at present, and the mechanism of plant stress resistance induced by marine oligosaccharides, so as to provide references for the applied research of marine oligosaccharides in plant stress resistance.

Key words: marine oligosaccharides, kinds, plant stress resistance, mechnism