3,4,5-三羥基苯甲酸甲酯抑制番茄青枯病菌的機(jī)制及防病作用研究
[Abstract]:The bacterial wilt of tomato is a devastating soil borne disease caused by Ralstonia salanocearum of Solanum Solanum. At present, chemical agents are still used in the prevention and control of the disease, because there are few fungicides to prevent and control the disease, and the pathogenic bacteria have produced different degrees of resistance to the current used medicament after long-term use, which leads to the prevention of effect. Therefore, agricultural production urgently needs to develop a new type of high efficiency, low toxicity, and low residual fungicide to prevent and control plant bacterial wilt. Previous studies have shown that the 3,4,5- three hydroxybenzoate (Methyl Gallate, MG) isolated from the leaves of the wood wax leaves has a strong inhibitory effect on Solanum Solanum L., but MG inhibits the Solanum Solanum The mechanism and the study on the prevention and control of Solanum wilt were not thorough enough. Therefore, the effects of MG on the physiological and biochemical characteristics of Solanum Solanum were determined, and the changes of the protein group under the inhibition of MG were analyzed, the control effect of MG on Tomato Bacterial Wilt and the transmission characteristics of the tomato plant were measured. The main results are as follows: 1.MG can destroy the integrity of cell wall of Solanum Solanum mycelium, inhibit the production of cellulase and pectinase, reduce the activity of peroxidase (POD) and catalase (CAT), and inhibit the glycolysis - three carboxylic acid cycle.2. in 20 mu by promoting the increase of the NADH/NAD+ ratio. There are 29 proteins with distinct differences in protein expression in R. solanacearum, and 22 different proteins are identified by mass spectrometry, including 11 new proteins, 5 missing proteins, 1 expressions of up regulation proteins and 5 expression decreasing proteins. These proteins include participation in energy metabolism, signal transduction, material transport and transcription repair. It is preliminarily conjectured that MG should have multiple target targets for Solanum Solanum, in which the inhibition of the energy metabolism of the bacteria may be one of the mechanisms of the inhibitory effect of MG on Solanum Solanum..3. will knock out the gene RSc3316 of the new protein F0F1ATP synthase epsilon of Solanum Solanum after the action of MG and obtain the missing mutant Delta DM33 16 and the complementary strain ACM3316 of the mutant, in order to study the genetic function of the new protein FOF1ATP synthase epsilon subunit after the MG effect of Solanum Solanum,.4.MG has a long holding time for the protection of tomato bacterial wilt. After 15d, inoculated with bacterial wilt, the control effect is still 52.15%. After inoculation of the pathogen 5D, the MG plant is applied to prevent the inoculation. The treatment effect was only 13.03%, indicating that the therapeutic effect of the medicament on tomato bacterial wilt is weak.MG can be absorbed quickly by tomato plant root system, and the control effect of 96.67%.MG in tomato roots for MG inoculating pathogen is very poor in the heading and direction of tomato plant, and the root inoculation after MG and root inoculation after MG after MG are inoculated. The enzyme activities related to the root and disease resistance and the secondary metabolites of tomato roots after treatment with 14.44% and 9.44%.5.MG were changed. Compared with the plants treated with 0.1% methanol solvent, the activity of IAAO decreased and the activity of POD had not changed obviously, but the activity of PPO was not obviously changed, but the viability of PPO was increased. MG was used to treat and inoculate the plant of pathogenic bacteria, PAL The activity continued to increase. The root of tomato treated with MG in seedling and field period was higher than that of disease related geraniol, sterol, beta glutamol and cork alcohol, which were higher than that of tomato plants treated with 0.1% methanol solvent.6.MG, which had a certain promoting effect on the germination of tomato seeds, such as.20 mu g /mL and 50 g/mL MG, clear water and 0.1% methanol solvent. The germination rates of 4D were 73.38%, 66.69%, 53.33%, 48.89%, 20 mu g/mL and 50 g/mL MG respectively. The seed germination rates were significantly higher than that of the clear water and 0.1% methanol solvent treatment.7.MG for tomato bacterial wilt disease,.0.5 g/L MG and 20% thiazen suspension agent for tomato bacterial wilt disease were 60.22% and 48.86%.MG respectively. The yield per mu was 2982.4 kg, which was 153.99% higher than CK treatment, and had no effect on the species and quantity of bacteria in soil.
【學(xué)位授予單位】:廣西大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類號(hào)】:S436.412.15
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