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Effects of Chitooligosaccharide Relieving Salt Stress on Cabbage Seedlings

BZ Oligo

Saline soil is widely distributed, mainly concentrated in the northwest, north, northeast and coastal areas of my country. There are also a lot of salinized soil in the cultivated land in China. Studies have shown that salt stress can reduce the growth rate of plants, and even lead to direct plant death. In addition, salt stress leads to slow water absorption by plant roots, hindered growth, and accelerated synthesis of osmotic regulators in plants. Under salt stress, the seed germination rate and seedling growth ability of different cabbage varieties decreased significantly. Another study showed that salt stress led to a decrease in the biomass and chlorophyll content of Brassica napus, and a significant increase in the relative conductivity, MDA content and antioxidant enzyme (SOD, POD, CAT) activities. At present, the cultivation method of cabbage seedlings in most areas is nutrient soil cultivation. After planting, soil conditions have become the main factor restricting the growth and development of cabbage seedlings. Especially in the saline-alkali regions of China, since most soils contain high salinity, seedling growth is prone to occur after planting. Defects, low quality, etc.

In the experiment, the 'Fulu' cabbage variety was used as the test material. After spraying 0 (CK), 25, 50, 75, 100, 125 mg/L chitosan oligosaccharide (COS) solution on its seedling leaves, 120 mmol/L chitosan oligosaccharide (COS) solution was regularly irrigated. L NaCl solution was subjected to salt stress treatment to study the physiological regulation mechanism of chitosan oligosaccharide on cabbage under salt stress.

Figure 1 Effects of different concentrations of chitosan oligosaccharide on the phenotype of cabbage seedlings under salt stress

Figure 2 Effects of different concentrations of chitosan oligosaccharide on root activity of cabbage seedlings under salt stress

In conclusion, under salt stress, chitosan oligosaccharide treatment can significantly improve the root activity of cabbage seedlings and promote the growth of cabbage roots; it can also increase the chlorophyll content of cabbage, and maintain the cell membrane permeability and osmotic regulation mechanism of cabbage. It can improve the activity of antioxidant enzymes such as SOD and POD in cabbage seedlings, accelerate the removal of excess reactive oxygen species, and reduce the peroxidative damage to cabbage seedlings to a certain extent. It can be concluded that the appropriate concentration of chitosan oligosaccharide can effectively improve the salt tolerance of cabbage seedlings under salt stress, alleviate salt damage, and ensure the healthy growth of cabbage seedlings to a certain extent, and 100 mg/L has the best effect.

From Yang Shun, "Effects of Chitosan Oligosaccharides on Physiological Characteristics of Cabbage Seedlings under Salt Stress"

Disclaimer: The contents of the above reprinted or quoted articles are only used for learning and research purposes. If there is any discrepancy, please correct it immediately.

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