Application of burdock fructooligosaccharides as disease-resistant elicitors in agriculture
A technology of burdock fructooligosaccharides and elicitors, applied in the field of functional oligosaccharides, to achieve the effect of improving persistence and stability, good development value, and good market prospects
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Embodiment 1
[0021] Embodiment 1: the growth-promoting effect of burdock fructo-oligosaccharides on plants
[0022] The tested cucumber (Cucumis sativus L.) seeds were "Lu 3" disease-resistant variety.
[0023] Burdock oligosaccharide (Burdock oligosaccharide, BOS), Mr>2000, DP13, oligosaccharide content 90%. Prepare 1.0, 3.0, 5.0, 8.0, 10.0 g / L solutions (hereinafter referred to as BOS solutions) respectively with distilled water for future use.
[0024] Determination of growth indicators:
[0025] Root length refers to the distance between the lowest point of the root of the plant and the soil surface; plant height refers to the length between the soil surface and the highest growth point; stem thickness refers to the thickness at 2 cm below the cotyledon; the underground part of the seedling (including root system and underground stem) , The dry weight of the aboveground part is determined by 80 ℃ drying method;
[0026] (1) The effect of burdock fructo-oligosaccharide treatment on...
Embodiment 2
[0034] Embodiment 2: Pot experiment burdock fructo-oligosaccharides induces effect on resistance to cucumber powdery mildew
[0035] The tested cucumber (Cucumis sativus L.) seeds were "Lu 3" disease-resistant variety. Cucumber seeds were sterilized with 5% NaClO solution for 15 minutes, then rinsed with clear water, placed in an incubator at 27°C to accelerate germination, selected dew-white seeds were sown in sterile nutrient soil, and seedlings were grown in a solar greenhouse (temperature and humidity were the same as in Example 1). , for routine management. When the cucumber seedlings are at the 3-leaf stage, set aside.
[0036] Burdock oligosaccharide (Burdock oligosaccharide, BOS), Mr>2000, DP13, oligosaccharide content 90%.
[0037] Prepare a 5.0 g / L solution with distilled water for later use.
[0038] Cucumber powdery mildew (Sphaerotheca cucurbitca) originated from the diseased cucumber leaves grown in greenhouses. After the diseased leaves are harvested, keep t...
Embodiment 3
[0049] Embodiment 3: Pot experiment burdock fructo-oligosaccharides induces effect on cucumber resistance to Fusarium wilt
[0050] The cucumber (Cucumis sativus L.) seeds tested were "Lu 10" disease-resistant variety. Cucumber seeds were sterilized with 3% sodium hypochlorite, rinsed, imbibed, and germinated, then planted in sterilized nutrient soil, and raised seedlings in a solar greenhouse (with the same temperature and humidity as in Example 1) for routine management. When the cucumber grows to the 4-leaf stage, set it aside.
[0051] Burdock fructooligosaccharide, same as embodiment 2.
[0052] Cucumber Fusarium oxysporum (Fusarium oxysporum) originated from the diseased cucumber leaves grown in greenhouses. After the strain was cultured on PDA medium at 22°C for 7 days, the spore suspension was prepared with sterile water at a concentration of 10 7 spores / ml.
[0053] Spray burdock fructo-oligosaccharides on the cucumber leaves of the test plants, and inoculate afte...
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