CN-121970754-A - Method for improving drought tolerance of cotton by exogenously applying melatonin

Abstract

The invention relates to the field of plant cultivation, and aims to solve the technical problem of improving drought tolerance of cotton. The technical scheme of the invention provides an application of melatonin in improving drought resistance of cotton. The invention initially establishes a method for enhancing the drought tolerance of cotton and provides a reference for promoting the growth of cotton in drought environment.

Inventors

• YE WUWEI
• YU XIN
• CHEN XIUGUI
• WANG JUNJUAN
• LU XUKE
• WANG SHUAI
• GUO LIXUE
• ZHAO LANJIE

Assignees

• 中国农业科学院棉花研究所

Dates

Publication Date

20260505

Application Date

20260318

Claims (9)

1. 1. The use of melatonin for improving drought tolerance in cotton.
2. 2. The method of claim 1, wherein the melatonin is used for improving drought tolerance in cotton during germination.
3. 3. The method according to claim 2, wherein the melatonin is used during germination of cotton seeds, and the melatonin is formulated in a solution having a concentration of 500. Mu.M.
4. 4. The method of claim 1, wherein the melatonin is used for improving drought tolerance in cotton seedlings.
5. 5. The method of claim 4, wherein the melatonin is applied when two to three leaves of cotton are grown, and the melatonin is formulated in a solution having a concentration of 50. Mu.M.
6. 6. A method for improving drought tolerance of cotton in germination period is characterized by comprising the step of adding melatonin during germination of cotton seeds.
7. 7. The method of claim 6, wherein the melatonin is added in a solution, the content of the melatonin in the solution is 500 mu M, and the melatonin is added by soaking seeds in the melatonin solution.
8. 8. A method for improving drought tolerance of cotton in seedling stage is characterized by comprising the step of adding melatonin when two to three true leaves of cotton grow.
9. 9. The method of claim 8, wherein the melatonin is added in a solution, the content of the melatonin in the solution is 50 mu M, and the melatonin is added in a mode of spraying the melatonin solution on leaves for 5-7 days.

Description

Method for improving drought tolerance of cotton by exogenously applying melatonin Technical Field The invention relates to the field of plant planting, and particularly discloses a method for improving drought tolerance of cotton by externally applying melatonin. Background As one of the most common weather disasters worldwide, drought affects human life widely and profoundly, and relates to multiple fields of agriculture, ecology, economy, health and the like, and the drought has persistence and linkage. Agricultural effects-drought results in reduced groundwater and soil moisture, severely affecting crop growth, and possibly creating famine and vital risks. Ecosystem risk-drought exposes the ecosystem to significant risks, potentially leading to reduced biodiversity and ecological imbalances. Social and economic problems are that drought causes social conflict, forced migration caused by resource shortage affects the life of millions of people. These effects indicate that drought is not only a natural phenomenon, but also a significant threat to the human society and ecological environment. Cotton is an important strategic material and is also an important cash crop, playing an important role in the development of agricultural economics. It has been found that drought stress severely limits the growth and development of cotton, such as plant height, she Ganchong, stem dry weight, leaf area index, fruit node number, fiber quality, canopy and root development, etc., so that under the global warming background, research on the influence of meteorological drought on cotton yield will help to deeply understand the development prospect of cotton industry to promote economic sustainable development. Seed germination is a key process of transition from a dormant state to a vegetative growth stage in a plant life cycle, and is a key link of the completion of the life cycle of a plant, and is directly related to the survival and continuation of species. The cotton seedling stage refers to the growth stage from seed germination to pre-emergence (typically 30-40 days after sowing), which is a critical stage in cotton root development, seedling morphogenesis and stress resistance development. Drought in the seedling stage not only restricts the growth in the seedling stage, but also can cause the reduction of the yield and quality in the later stage. However, few measures are taken to improve the germination rate and seedling drought tolerance of cotton under drought conditions at present. Disclosure of Invention The invention can improve drought tolerance of cotton in germination period and seedling period by applying melatonin exogenously, and promote cotton growth in drought stress environment. In order to achieve the aim, the invention provides the following technical scheme that the first aspect of the invention provides application of melatonin (CA, CAS number 73-31-4) in improving drought tolerance of cotton. The application is any one or more of the following: Y1, application in improving drought tolerance of cotton in germination period; Y2, in improving cotton seedling drought tolerance. In the above application, the melatonin is formulated as a solution at the time of use. In the above application, the solution, the solvent may be water. In the above application, the melatonin in Y1 is used during germination of cotton seeds, and the concentration of melatonin in the solution is 500. Mu.M. In the above application, the melatonin in Y2 was used when cotton grew two to three true leaves, and the concentration of melatonin in the solution was 50 μm. The invention also provides a method for improving drought tolerance of cotton in germination period, which comprises the step of adding melatonin during germination of cotton seeds. In the above method, the melatonin is formulated into a solution at the time of use, and the melatonin may be contained in the solution at 500 μm. In the above method, the solution, the solvent may be water. In the method, the melatonin is added by soaking seeds in a melatonin solution. The invention also provides a method for improving drought tolerance of cotton in seedling stage, which comprises the step of adding melatonin when two to three true leaves of cotton grow. In the above method, the melatonin is formulated as a solution, and the melatonin may be present in the solution in an amount of 50 μm. In the above method, the solution, the solvent may be water. In the method, the melatonin is added by spraying the melatonin solution on the leaves for 5-7 days. The invention develops a method for enhancing drought tolerance of cotton and provides an effective strategy for promoting the growth of cotton in drought environment. Drawings FIG. 1 shows the effect of different treatments on seed germination in example 1 of the present invention. Fig. 1a is a photograph of a day 3 phenotype of H177 germination in cotton that was applied with different concentrations of melatonin, fig. 1B