A method for improving plant nodulation nitrogen fixation efficiency
A nitrogen fixation efficiency and nodulation technology, applied in the field of genetic engineering, can solve problems affecting nitrogen fixation efficiency and achieve the effects of improving nitrogen fixation efficiency, increasing nodulation, and improving yield traits
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Embodiment 1
[0024] Embodiment 1, GmSPL9d Analysis of expression patterns of genes in response to rhizobia treatment.
[0025] 1) Material acquisition: The material used in the experiment was Williams 82 (W82 for short); the material was carried out according to the following process: soybean seeds were sterilized with 70% alcohol for 30 sec, and sowed in the vermiculite substrate soaked in low-nitrogen nutrient solution. They were cultured in a culture room with 16 h light / 8 h dark, light intensity 7000 LUX, temperature 26 °C, and relative humidity 70%. 4 days after sowing, the cotyledons were unearthed, inoculated with rhizobia, and a control (-R) not inoculated with rhizobia was set at the same time. Take samples of main root and lateral root 1 cm below the rhizome joint at 0 day, 1 day, 3 day, 5 day, and 7 days after inoculation, and freeze them in liquid nitrogen.
[0026] 2) Isolation of mRNA: Trizol method was used to extract soybean total RNA. ①Put the tissue into a grinder and g...
Embodiment 2
[0032] Example 2, the cultivation of transgenic soybeans with high ability of nodulation and nitrogen fixation.
[0033] 1) Extraction of total RNA from root tissue of Wilimas82 soybean
[0034]The mortar has been treated at 180 ℃ for 8 hours or burned to eliminate RNase contamination; reagents such as chloroform, isopropanol, and ethanol should be freshly opened and uncontaminated; other equipment such as pipette tips, centrifuge tubes and reagents such as ultrapure water , NaAc, were treated with 1 ‰ DEPC water overnight, and then sterilized at 121 ℃ for 30 minutes by high temperature and humidity.
[0035] (1) Take 100 mg of soybean root material and grind it with liquid nitrogen, add 1 mL of TRI pure reagent, after fully homogenizing, inhale the homogenate into a 1.5 mL centrifuge tube, and place it at room temperature for 5 min;
[0036] (2) Add 200 μl chloroform, vortex to mix, let stand for 5 minutes, 4 ℃, 12000 r / min, centrifuge for 10 minutes;
[0037] (3) Take the ...
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