Method for improving cadmium tolerance in rice and reducing cadmium content in rice grains

A method for improving cadmium tolerance in rice and reducing cadmium content in rice grains, comprising the following steps:

• (a) inoculating the endophytic fungus Falciphora oryzae FO-R20 with the deposit number of CCTCC M 2021505 into a liquid fermentation medium and performing culturing to obtain fermentation broth, and then inoculating the fermentation broth on sterile barley grains and performing culturing in the dark until mycelia grow and the grains are covered with mycelia to obtain an FO-R20 solid fungal fertilizer;
• wherein the liquid fermentation medium contains 0.4% of soybean cake flour, 1% of corn flour, 0.05% of magnesium sulfate and 0.1% of dipotassium phosphate per 250 mL of the medium by mass;
• (b) mixing the FO-R20 solid fungal fertilizer with a seedling substrate to obtain a mixed substrate, in which germinated rice seeds are sown for seedling raising and culturing to obtain rice seedlings;
• and
• (c) transplanting the rice seedlings to a field, and performing culturing until harvest.