Method for promoting plant seed germination under cadmium stress

Abstract

The invention relates to a method for promoting plant seed germination under cadmium stress. The method comprises the treatment of plant seeds through melatonin before germination. The method comprises the following step: enabling the plant seeds to contact with 10 to 250 micron mol / L by concentration of melatonin. With the adoption of the method, the germination potential of the plant seeds, in particular cucumber seeds and switchgrass seeds under the cadmium stress, can be effectively increased; the germination rate can be increased; the seeds can rapidly germinate uniformly; the important topic on the way of enabling normal germination of the seeds in the soil polluted by cadmium in the agricultural production is solved; the method has an important application value in production; melatonin is utilized to pre-treat, so that the expression of antioxidant enzyme activities can be induced, a large amount of free radicals produced under the cadmium stress can be removed, the oxidation stress is relieved, the oxidation damage is reduced, the seeds can be kept in a relatively small membrane lipid peroxidation level, and as a result, the seeds can germinate normally.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a method for promoting seed germination under cadmium stress. Background technique [0002] Heavy metal pollution generally refers to the pollution caused by metals or their compounds with a specific gravity above 4 (mainly including copper, zinc, chromium, lead, mercury, nickel, cobalt, etc.) in the environment. Among all kinds of heavy metal pollution, cadmium pollution is the most widespread, and various cadmium pollution incidents have emerged in an endless stream in recent years. The toxicity of cadmium is very high, and the main source is the wastewater discharged from electroplating, mining, smelting, fuel, battery and chemical industries. Growth retardation, reduced dry matter production, etc. [0003] The life of a plant begins with seeds, and seed germination is restricted by external environmental conditions, including light, temperature, water, oxygen, etc. In field pr...

AI Technical Summary

Problems solved by technology

However, the usual pretreatment method is to use a variety of substances mixed according to a specific formula, and most of these formulas have obvious effects on one or a few plant seeds, and there is a certain species specificity.

In addition, some researchers put hydrogen peroxide (H 2 o 2 ), nitric oxide (NO), jasmonic acid (JA), salicylic acid (SA) and other signal substances that play a role in the process of plant stress resistance are used in the research of plant seed resistance to cadmium, but this method also exists only Problems that are valid for a few specific species, cannot be applied to crops such as cucumber, switchgrass, etc.

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