Method for rapidly propagating sugarcane tissue culture seedlings with spermine

The invention relates to a method for rapidly propagating sugarcane tissue culture seedlings with spermine. The method comprises the following steps: using sugarcane immature leaf slices as explants, vaccinating the explants to an improved MS solid medium of MS+Spm.1.5 mg . L-3.0mg . L, regulating the pH to be 5.8-6.0, and performing continuous culture for 10 d-25 d to induce and obtain sugarcane callus tissue agglomerates; retransferring the agglomerates to the same fresh culture medium for subsequent culturing for 15 d, and then separating and cutting obtained callus tissues into small blocks to be revaccinated to the same fresh culture medium; performing subsequent culture for 20d -30d, transferring regeneration seedlings to the same fresh culture medium to be cultured for 20d so as to obtain test-tube seedlings of which the stem length is 5-6cm and the root seedlings are complete. According to the invention, only one culture medium is used from the starting of explant culture to the generation of the complete regenerated plantlets, so that the production process for the sugarcane tissue culture seedlings is obviously simplified, besides, the toxic action of 2,4-D induction callus tissues is removed, and the cost of the used spermine is low, so that the method is more favorable for popularization.