| abstract |
A water-soluble polypeptide inducer for improving disease resistance of tobacco and application thereof, the inducer comprises: 15-25 parts of water-soluble polypeptide, 50-70 parts of solvent, 5-15 parts of penetrant, and 5-15 parts of stabilizer , the water-soluble polypeptide is extracted from the inactivated mycelium of Penicillium; the preparation method of the water-soluble polypeptide is as follows: the crude polypeptide extract is extracted from the inactivated mycelium of Penicillium by a salting-out method, and then the crude polypeptide extract is subjected to a salting-out method. The tertiary separation and activity screening obtain the concentrated and dried sample of the water-soluble polypeptide, and the water-soluble polypeptide can induce tobacco to resist tobacco mosaic virus and tobacco blackleg. The extraction method of the invention is simple, the waste can be fully utilized, the effect is good, and the quality is stable. |