Tomato Growth Chitosan Oligosaccharide Agriculture Cold Resistance 148411 57 8

Promote Tomato Growth Chitosan Oligosaccharide Agriculture

【Enhancing cold resistance of Tomato Seedlings】

The middle leaves or the upper leaves of the adult plant were often damaged by cold when the tomato was in the condition of sharp cold current or continuous low temperature. Chilling injury is one of the common physiological diseases of tomato. It mainly occurs in protected cultivation and tomato seedling raising, especially in the process of super early maturing cultivation and late autumn cultivation. After the tomato suffered from cold injury, the yield was reduced in varying degrees in mild cases, and all the plants were frozen in severe cases, resulting in the failure of harvest.

As a kind of plant signal elicitor, chitosan oligosaccharide is a new type of fertilizer in recent years. Chitosan oligosaccharides can induce crops to improve their resistance to disease and stress, and regulate their own metabolic balance.

Low temperature can reduce the chlorophyll content and photosynthetic rate of plant tissue. Soaking seeds with chitosan oligosaccharide can keep the chlorophyll content and photosynthetic rate of chilling injury tomato seedlings at a high level. It can also improve the root activity of tomato, so that tomato can still absorb a certain amount of nutrients at low temperature, maintain normal growth, and improve the cold resistance.

【Increasing chlorophyll content of Tomato】

Chlorophyll is the main nutrient accumulation material of crops. The content of chlorophyll directly affects photosynthesis and growth of crops. Plant root is an important nutrient absorption organ. The level of root activity and growth directly affect the nutritional status and yield of aboveground crops. Root activity is the key parameter to judge whether the plant root index is good or not.

The main functions of soluble sugar are: transforming and forming other organic substances such as nucleic acid, synthesizing cellulose to form cell wall, and decomposing products are the raw materials for the synthesis of many other organic substances, such as organic acids formed in the process of sugar respiration; sugar provides the necessary energy for various synthetic processes and life activities of crops. However, soaking seeds with chitosan oligosaccharide had great effects on chlorophyll content, root activity and soluble sugar of chilling injury tomato seedlings.

【Broad spectrum sterilization】

Spraying 1mg/ml chitosan oligosaccharide solution at tomato 4-leaf stage could induce tomato plants to produce resistance factors to early blight.The disease rate and disease index of three tomato varieties were significantly lower than those of inoculated control, and the relative control effects were 39.8%, 49.9% and 56.4% respectively. Chitosan oligosaccharide could also induce the increase of peroxidase, polyphenol oxidase, chitinase, phenylalanine ammonia lyase and glucoamylase in tomato leaves The activity of Polysaccharide Enzyme