Abstract: A composite solution for enhancing induced disease resistance of lentinan (LNT) to a plant, a preparation method of the composite solution, and a method for enhancing induced disease resistance of LNT to a plant are provided. The composite solution for enhancing induced disease resistance of LNT to a plant includes: an LNT-containing solution and an SPc-containing solution, where SPc is a dendritic macromolecule functionalized by an amino functional group, and has a structural formula shown in formula I, where n=1 to 100. An LNT/SPc complex is produced in the composite solution. SPc spontaneously combines with LNT through hydrogen bonding, such that an agglomerate structure formed by LNT in an aqueous solution is broken and reduced to a nano-scale particle size, and a spherical particle is produced, which can significantly reduce a contact angle of the LNT aqueous solution, and promote the distribution and diffusion of LNT.

Abstract: The present application discloses a plant senescence accelerator named IDL7 mature polypeptide, and its preparation method and an application thereof. The application belongs to the field of a plant senescence accelerator, and the IDL7 mature polypeptide serves as a major functional ingredient with the following amino acid sequence: F-G-S-L-V-L-N-A-L-P-K-G-S-R-P-G-S-G-P-S-K-K-T-N. The IDL7 mature polypeptide plant senescence accelerator may promote the leaf senescence of plants without other additional adverse manifestations, thus this application has strong field operability.

Abstract: The present application an IDL6 mature polypeptide plant aging promoter, and a preparation method and application thereof, belonging to the field of plant aging promoters. The IDL6 mature polypeptide plant aging promoter is with an IDL6 mature polypeptide as a main functional component, and the IDL6 mature polypeptide having the following amino acid sequence: F-G-S-L-V-L-N-A-L-P-K-G-S-V-P-A-S-G-P-S-K-R-I-N. The provided plant aging promoter can promote the leaf senescence of the plant, accelerate the senescence, and has no other additional bad performance, and has extremely strong field operability.