107 results about "Colletotrichum" patented technology

This invention relates to polynucleotide sequences encoding a gene that can confer resistance to the plant pathogen Colletotrichum, which causes anthracnose stalk rot, leaf blight and top dieback in corn and other cereals. It further relates to plants and seeds of plants carrying chimeric genes comprising said polynucleotide sequences, which enhance or confer resistance to the plant pathogen Colletotrichum, and processes of making said plants and seeds. The invention further presents sequences that can be used as molecular markers that in turn can be used to identify the region of interest in corn lines resulting from new crosses and to quickly and efficiently introgress the gene from corn lines carrying said gene into other corn lines that do not carry said gene, in order to make them resistant to Colletotrichum and resistant to stalk rot.

The invention discloses an application of a licorice root extract, which is particularly applied to controlling plant diseases. By indoor bioassay and pot experiment, the invention provides a good control application of the methyl alcohol extract of a licorice root for common plant diseases to peronophythora, phytophthora, cladosporium, sclerotinia and colletotrichum, and the like. The invention proposes a new concept for the licorice root and the extract thereof used for controlling plant diseases, provides a new exploitative resource for plants to replace chemosynthetic fungicide, and has an important significance for solving the growing resistibility problem of pathogenic bacteria to medicine.

The invention provides a combined volatile compound and application thereof in preventing and treating anthracnose of postharvest mangos. According to the invention, the application of the combined volatile compound in preventing and treating the anthracnose of the postharvest mangos is found for the first time. The combined volatile compound can act on colletotrichum mycelium and conidium by volatilization in a gas mode without contacting the fruits in a sealed environment to inhibit mycelia growth, conidia germination and disease speckle expansion; thus, an effect of preventing and treatingthe mango anthracnose is achieved. As the combined volatile compound is extremely easy to volatilize, the compound left on the surfaces of the mangos after steaming treatment is easy to volatilize; thus, an effect on mango quality and harm to human body health are reduced. The invention determines matching and use concentrations of 7 groups of different combined volatile compounds with an effect of preventing and treating the mango anthracnose. Compared with existing preservation chemicals, the combined volatile compound has the advantages of good preventing effect, low residue and very good development and application prospects.

The invention discloses a compound separated from colletotrichum gloesporioides and a preparation method and application thereof. The molecular formula of the compound separated from the colletotrichum gloesporioides is C15H22O3. The preparation method of the compound comprises the following steps: activating a colletotrichum gloesporioides strain which has been cryopreserved, inoculating the activated strain to a culture medium for culturing, preparing a PDB liquid culture medium, and sterilizing; dissolving a bottle of penicillin and a bottle of streptomycin in sterile water, and adding the solution in a fermenting tank; inoculating the sterilized culture into the fermenting tank for fermenting; after fermenting is finished, carrying out suction filtration on a fermented product to obtain mycelium; extracting and concentrating to obtain a bacteria solution extract; and carrying out column chromatography, elution and wet packing on a coarse extract, carrying out elution and column chromatography on silica gel again, carrying out elution with petroleum ether-acetone eluant again, carrying out column chromatography, carrying out elution with chloroform-methanol to implement decolorization, and carrying out separation to obtain the compound which is colletotrichum gloesporioides A. The provided compound can be used for preparing anti-senile dementia drug.