CN109221195B

CN109221195B - New application of thioadenosylmethionine in reducing pesticide residues of vegetables

Info

Publication number: CN109221195B
Application number: CN201811220982.XA
Authority: CN
Inventors: 巩彪; 顾超珩; 史庆华
Original assignee: Shandong Agricultural University
Current assignee: Shandong Agricultural University
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2021-03-16
Anticipated expiration: 2038-10-19
Also published as: CN109221195A

Abstract

The invention relates to a new application of thioadenosylmethionine in reducing pesticide residue of vegetables, which is to make the concentration of the thioadenosylmethionine be 0.5 mu mol.L^‑1～1μmol·L^‑1The thioadenosylmethionine solution is sprayed on vegetable crops after 2 days of pesticide application, and is used for reducing pesticide residue in the vegetable products before the vegetable products are harvested. The method is easy to implement, simple and convenient to operate, low in investment cost and obvious in effect, and can effectively reduce pesticide residues of vegetables and realize safe production of the vegetables.

Description

New application of thioadenosylmethionine in reducing pesticide residues of vegetables

Technical Field

The invention relates to a new application of thioadenosylmethionine in reducing pesticide residues of vegetables, belonging to the field of research on safe production of vegetables.

Technical Field

The vegetable industry has high economic benefit and large cultivation area, is developed rapidly in China, and even becomes an agricultural support industry in some areas. However, vegetable crops are vulnerable to various diseases and insect pests, and the yield and the economic benefit are affected. At present, chemical prevention and control are mainly used in vegetable production, so that the pesticide residue exceeds the standard. The method becomes the most prominent problem in the food safety hidden troubles in China, and is also an important factor for restricting the export of agricultural products in China.

Disclosure of Invention

In order to solve the problems, the invention provides a novel application of thioadenosylmethionine (S-adenosylmethionine or S-adenosyl-L-methionine) in reducing pesticide residues in vegetables, and the application can reduce the pesticide residues in the products before the vegetables are harvested.

In order to achieve the purpose, the invention adopts the following technical scheme:

1) water is used as solvent to prepare the final concentration of 0.5 mu mol.L^-1～1μmol·L^-1The solution of thioadenosine methionine;

2) the concentration is 0.5 mu mol.L^-1～1μmol·L^-1The thioadenosylmethionine solution is sprayed on vegetable crops after 2 days of pesticide application and is sprayed for 1 time.

The invention has the beneficial effects that:

1) the effect of the thioadenosylmethionine in reducing the pesticide residue of plants is discovered for the first time;

2) the thioadenosylmethionine is a dietary supplement required by a human body and is harmless to the human body and the environment;

2) the thioadenosylmethionine can enhance the stress resistance of plants and promote the growth of the plants;

2) simple operation and obvious degradation effect of pesticide residue.

Drawings

FIG. 1 effect of various concentrations of thioadenosylmethionine on residual amount of chlorothalonil from tomato leaves.

FIG. 1 shows that the tomato fruit can absorb a certain amount of drug after being sprayed with chlorothalonil for 2 days, but the chlorothalonil in the tomato fruit can degrade automatically with the time; and spraying 0.5 mu mol/L^-1～1μmol·L^-1The thioadenosylmethionine solution can obviously improve the degradation rate (P) of the chlorothalonil<0.05). As the thioadenosylmethionine is a common substance of plant common metabolic pathways, the thioadenosylmethionine has the function of promoting the degradation of plant pesticides.

Detailed description of the preferred embodiments

The present invention will be further illustrated with reference to the following specific examples, but the present invention is not limited to the following examples. The method is a conventional method unless otherwise specified. The thioadenosylmethionine described in the present invention is commercially available; the starting materials are commercially available from the open literature unless otherwise specified.

Two treatments were set for the control and experimental groups: spraying chlorothalonil to the two groups of treated tomato plant fruits simultaneously; after 2 days, the experimental group is sprayed with 0, 0.1, 0.5, 1 and 2 mu mol.L of tomato fruit^-1The thioadenosylmethionine solution of (a), two treated tomato fruits were taken for chlorothalonil content determination on

days

2, 5, 10, and 15 after treatment, respectively (fig. 1); the effect of thioadenosylmethionine on the degradation of pesticide residues in tomato was evaluated.

The experimental results are shown in fig. 1, the chlorothalonil residue of tomato fruits in the control treatment is respectively reduced to 63.7%, 42.7% and 30.7% on

days

5, 10 and 15, which indicates that the plants have the capability of self-degrading pesticides. Spraying 0.5 mu mol/L from exogenous source^-1～1μmol·L^-1The thioadenosylmethionine solution can reduce the residual quantity of chlorothalonil of tomato fruits to 42.5 percent, 21.9 percent and 11.7 percent on

days

5, 10 and 15 respectively, and reduce the residual quantity of chlorothalonil of the tomato fruits to 33.2 percent, 48.6 percent and 61.9 percent respectively compared with a control group in the same period. The spraying of the thioadenosylmethionine is proved to have remarkable capability of promoting the degradation of plant pesticides.

In conclusion, the method proves that the pesticide is applied to the vegetable crops for 2 days and then 0.5 mu mol.L of exogenous spraying is carried out^-1～1μmol·L^-1The thioadenosylmethionine solution can promote the degradation of pesticide. The invention has simple application and operation and no other toxic or side effect, can promote the vegetable crops to rapidly degrade the pesticide, shortens the safety period of the vegetable crops after the pesticide is used, and is beneficial to the safe production of the vegetables.

Claims

1. Application of thioadenosylmethionine in reducing pesticide residue of chlorothalonil of tomato.

2. The use of thioadenosylmethionine as claimed in claim 1 for reducing pesticide residue in tomato chlorothalonil, characterized in that: the concentration is 0.5 mu mol.L^-1~1µmol·L^-1The thioadenosylmethionine solution is sprayed on the tomato crops after the pesticide is applied for 2 days, and the spraying is carried out for 1 time.

3. The use of thioadenosylmethionine as claimed in claim 1 for reducing pesticide residue in tomato chlorothalonil, characterized in that: the concentration is 0.5 mu mol.L^-1The thioadenosylmethionine solution is sprayed on the tomato crops after the pesticide is applied for 2 days, and the spraying is carried out for 1 time.