AM真菌調控黃花鐵線蓮生長和有效成分含量的機制研究
[Abstract]:Arbuscular mycorrhizal fungi, or AM fungi (Arbuscular Mycorrhiza Fungi, AMF), is a kind of beneficial microorganism widely distributed in soil ecosystem. It can form AM symbiosis with 90% higher plants. Mycorrhizal.AM fungi can promote the absorption of nutrient elements and water, improve the nutritional status of plants, and thus promote the growth and development of plants and improve plant growth. The accumulation and resistance of the product secondary metabolites. Clematis intricata Bunge is a herbaceous plant of the Ranunculus Clematis. It is used as an important medicinal plant in Chinese herbal medicine, Mongolian medicine and Tibetan medicine. The main active ingredient is flavonoids, which have anti-inflammatory, antitumor and antitumor activity, and the toxicity is very small. Wet sieves are used in this subject. The diversity of AM fungi in rhizosphere soil of Clematis from 7 areas of Inner Mongolia was studied by dipping method. Under the pot culture, the growth, physiological and biochemical characteristics and the accumulation of total flavonoids and the key to the analysis of flavonoids biosynthesis by qRT-PCR technology were studied under different nitrogen (N) and phosphorus (P) levels inoculated with Mose balloon mildew (Glomus mosseae). In response to different N and P levels, the enzyme gene was used to explore the effect mechanism of AM fungi on the growth and the accumulation of effective components of Clematis latitum; two key enzyme genes, phenylalanine ammonia lyase gene (CiPAL) and chalcone synthase gene (Ci) were cloned by RACE (Rapid Amplification of cDNA Ends) technology. CHS) and bioinformatics analysis. This subject provides mycorrhizal and molecular biological basis for large-scale cultivation of Mongolian medicinal materials. The main results are as follows: 1. from the rhizosphere soil of the 7 regions of Inner Mongolia, 3 genera and 29 species of AM fungi were isolated, including 27 species of saccule genus Glomus, and Scutellospore of the genus megaspora The 1 species, 1 species of Acaulospora, the results showed that the diversity of AM fungi in the rhizosphere soil of the rhizosphere of the yellow flower Clematis was rich.2. potted conditions, the inoculation of AM fungi under different N levels had a significant effect on the growth of Clematis rhizosphere. Under the different N levels, the AM fungi could infect the rhizosphere of the Yellow clematis, and could effectively promote the birth of the Clematis. Long, increase yield; under N conditions, AM fungi can promote the growth of Clematis by affecting the activity of peroxidase and the content of proline in the osmotic substance, and the accumulation of total flavonoids in the upper part of the ground can be effectively improved by regulating the expression of the related enzyme genes of the flavonoid biosynthesis pathway (and the expression of CiCHS is up significantly up). The high N limits the growth of Clematis and reduced the content of effective components. Therefore, when the dosage of N is 10%N~20%N, the best effect of inoculation of AM fungi on the.3. pot culture, the inoculation of AM fungi under the different P levels has a significant effect on the growth of Clematis Clematis. And it can promote the growth of Clematis Clematis and increase the yield of Clematis. Under the level of P, the inoculation of AM fungi by affecting the peroxidase activity and the content of proline in the osmotic substance, reducing the content of malondialdehyde in leaves, and making the plant of Clematis yellow flower better, by regulating the key enzyme gene of the flavonoid biosynthesis pathway of Clematis. The expression of the expression of CiPAL and CiCHS increased significantly, which promoted the accumulation of total flavonoids in the upper part of the ground and improved the medicinal quality of Clematis Clematis. When the dosage of P was 5%P~20%P, the best effect of inoculation of AM fungi was.4. using RACE technology, and the total length of CiPAL and CiCHS two genes was cloned. The total length of CiPAL cDNA sequence was 2386. P, a complete ORF containing 1 2118 BP, encodes 705 amino acids. In the 187-202 position of CiPAL, it contains an enzyme active center sequence (GTITASGDLVPLSYIA), a typical member of the PAL family; the CiCHS cDNA sequence is 1445 BP, contains 1 1191bp intact ORF, and 396 amino acids contain two conserved functional domains, including 396 amino acids. It is a typical CHS family member.5. this study found that at a moderate amount of N and P, AM fungi can effectively promote the growth of Clematis, induce the expression of the key enzyme genes of flavonoids biosynthesis, improve the content of the effective component of Clematis, and improve its medicinal quality.
【學位授予單位】:內蒙古醫(yī)科大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:S567.239
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