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63 results about "Dahlia" patented technology

Dahlia (UK: /ˈdeɪliə/ or US: /ˈdeɪljə, ˈdɑːl-, ˈdæljə/) is a genus of bushy, tuberous, herbaceous perennial plants native to Mexico. A member of the Asteraceae (or Compositae), dicotyledonous plants, related species include the sunflower, daisy, chrysanthemum, and zinnia. There are 42 species of dahlia, with hybrids commonly grown as garden plants. Flower forms are variable, with one head per stem; these can be as small as 5 cm (2 in) diameter or up to 30 cm (1 ft) ("dinner plate"). This great variety results from dahlias being octoploids—that is, they have eight sets of homologous chromosomes, whereas most plants have only two. In addition, dahlias also contain many transposons—genetic pieces that move from place to place upon an allele—which contributes to their manifesting such great diversity.

Method for remarkably improving resistance of cotton to greensickness through verticillium dahlia interference VdRGS1 gene expression

The invention discloses a method for remarkably improving resistance of cotton to greensickness through verticillium dahlia interference VdRGS1 gene expression and belongs to the field of biological technique application. The invention provides a nucleotide sequence of a VdRGS1 gene and an ORF sequence and an amino acid sequence of cDNA. Function and phenotypic analysis shows that VdRGS1 is capable of regulating and controlling pathogenicity of verticillium dahlia, formation of microsclerotia, growth of spores and hyphae, and the like, and plays a significant role when verticillium dahlia invades and infect a host. By using a transgenic technique, a greensickness bacterium which can express green fluorescent protein (GFP) is created, by using a virus-induced gene silencing (VIGS) technique, a GFP gene of the transgenosis verticillium dahlia can be efficiently silenced in cotton, the result shows that host induced gene silencing (HIGS) is achieved on the basis of the VIGS technique, andinvading verticillium dahlia genes can be successfully silenced in cotton by using the technique. By using an HIGS technique based on VIGS, the verticillium dahlia VdRGS1 is silenced in cotton, and the resistance of cotton to verticillium dahlia is remarkably improved.
Owner:NANJING AGRICULTURAL UNIVERSITY

Regulation and control method for improving heat resistance of dahlia

The invention discloses a regulation and control method for improving heat resistance of dahlia. The method includes: preparing a salicylic acid solution with the concentration of 0.1-1.5 mmol/L, spraying leaves with the salicylic acid solution in 1-2 days before high temperature stress during a growth period or a flowering period of the dahlia, continuously spraying the leaves for 2 days, and spraying the leaves once in the morning and evening every day respectively; and spraying the leaves once every 6-8 days during continuous high temperature stress. After the dahlia is sprayed with the salicylic acid solution, dahlia plants grow and develop in a relative normal state, and most of the dahlia plants grow well in a high temperature stress environment; leaves of the dahlia plants are dark green, and the chlorophyll relative content and the net photosynthetic rate are increased; the number of flowers of a single plant is increased, the flower diameter is increased, and the full-bloom period is prolonged; resistant physical signs such as autioxidant enzyme activities, malondialdehyde, proline and soluble proteins of the leaves of the dahlia change correspondingly, and then tolerance of the dahlia in the high temperature environment can be effectively improved, which has positive effects on introduction, open field cultivation and landscape application of the dahlia.
Owner:SUZHOU UNIV

Preparation method of strawberry verticillium dahlia spore suspension

The invention discloses a preparation method of a strawberry verticillium dahlia spore suspension. The method comprises the following steps of collecting strawberry verticillium dahlia infected plants; performing separation and purification; screening out pathogenic bacteria of the strawberry verticillium wilt; inoculating the separated verticillium dahlia into a PDA culture medium to perform plate culture and activation; taking down an agar block containing activated pathogenic bacteria; adding the agar block into a mixture formed by a liquid VL culture medium and 2.0-percent saccharose for shake culture; performing gauze filtering and filter paper vacuum pumping filtering for removing rest hyphae to obtain filter liquid for use; centrifuging filter liquid; abandoning supernate; and performing resuspension and sedimentation by 2ml of sterile water to obtain the strawberry verticillium dahlia spore suspension. The liquid culture medium inoculation and culture mode is used, so that the full growth all over the whole liquid culture medium can be fast achieved; and the labor consumption and the material consumption are reduced. The preparation method has the advantages that the inoculation amount is small; the spore generation speed is high; the growth is fast; the differences of spore quantities prepared from the same pathogenic bacteria in the same batch and different batches are small; and the method stability is high.
Owner:INST OF GARDENING ANHUI ACADEMY OF AGRI SCI

Application of ambrosia artemisiifolia essential oil as verticillium dahliae bactericide

The invention relates to application of ambrosia artemisiifolia essential oil as a verticillium dahliae bactericide. Growth of verticillium dahliae is inhibited by a method of enabling the verticillium dahlia to be in contact with the ambrosia artemisiifolia essential oil and fumigating the verticillium dahlia with the ambrosia artemisiifolia essential oil. Results show that the ambrosia artemisiifolia essential oil has a significant effect on mycelial growth of the verticillium dahliae at a low concentration of 0.5 mu l/ml, and the growth inhibition effect is improved gradually with the increase of the concentration; when the concentration is continuously increased to be 5 mu l/ml, the mycelia of inoculated stems all lose the activity of continuous expansion, and the growth of the myceliais completely inhibited; in a fumigation experiment, the ambrosia artemisiifolia essential oil with the concentration of 0.2 mu l/ml fumigates the stems of the verticillium dahlia, and the mycelia ofthe stems are significantly inhibited; and when the concentration reaches 1.2 mu l/ml, the mycelia are killed completely to lose activity. The growth of the verticillium dahliae is inhibited by the ambrosia artemisiifolia essential oil provided by the invention, the ambrosia artemisiifolia essential oil is derived from plants, can be decomposed in nature, is environmentally friendly and does notpollute the environment, and meanwhile, waste harmful plants are utilized.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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