Method for screening key metabolites responding to high-temperature stress of poplar
A technology of high temperature stress and metabolites, applied in the field of screening key metabolites in response to poplar high temperature stress, metabolomics analysis of poplar high temperature stress, can solve the problems of less research at the molecular level, and achieve the effect of potential application value
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Embodiment 1
[0030] Embodiment 1 handles poplar under temperature environment, obtains control group and high temperature group poplar leaf sample
[0031] Control group (control, CTRL group): treated at 25°C for 6 hours, high temperature group (heat, H group): ramp up the temperature first, rise from 25°C to 35°C within half an hour, stay for 2 hours, and then rise from 35°C to 45°C, and maintain 45°C for 5 hours. Take the 3rd to 4th leaves under the terminal bud, sampling time point: 5h at 45°C (such as figure 1 shown).
Embodiment 2
[0032] Example 2 Preparation of metabolites from leaf samples of high temperature group and control group
[0033] Get 0.06g leaf tissue sample and add in 2ml EP tube, then add in 0.48ml extraction solvent (methanol: H 2 O(v:v)=3:1) and 24μL ribitol solution (2mg / ml); process the extract with a grinder for 4 minutes, ice-water bath for 5 minutes (repeated twice), and refrigerated centrifugation for 15 minutes (4°C, 13000rpm ); Take 0.35ml supernatant and transfer to 2ml GC / MS glass flask. Dry the extract in a vacuum concentrator; add 80 μL methoxyamine salt reagent (commercially available product) to the dried metabolites, and after slow mixing, incubate at 80°C for 30 minutes; then, quickly add 100 μL BSTFA at 70°C Incubate for 1.5h.
Embodiment 3
[0034] Example 3 Detection of metabolites in high temperature group and control group based on GC / TOF-MS
[0035] GC / TOF-MS analysis was performed on Agilent 7890 gas chromatography-time-of-flight instrument configured with DB-5MS capillary column (5% diphenyl, 95% dimethyl polysiloxane). The specific detection and analysis conditions of GC / TOF-MS are: injection volume: 1 μL, splitless mode; carrier gas: helium; front injection port purge flow rate: 3mL min -1 ;Column flow rate: 1mL min -1 ;Column temperature: 50°C for 1 minute, rising to 310°C at a rate of 10°C per minute, and holding for 8 minutes; Front inlet temperature: 280°C; Transfer line temperature: 270°C; Ion source temperature: 220°C; Ionization voltage : -70eV; scanning mode: 50-500m / z; scanning rate: 20spectra / sec; solvent delay: 460s, and the acquisition mode is full scanning mode.
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