Effect of pathogen Globisporangium ultimum on plant growth and colonizing bacterial communities.

Plants recruit plant-associated microbes from soil to enhance their growth and mitigate the adverse effects of pathogen invasion on plant health. How pathogens impact the interactions of the plant-associated microbes and plant growth is poorly understood. We established S-microsystems (sterile soil inoculated with 101 bacteria isolated from humus soil with Artemisia annua, Oryza sativa or Houttuynia cordata), and N-microsystems (natural soil with these plants) to evaluate the effects of the fungus Globisporangium ultimum on plant growth and their colonizing bacterial communities (CBCs).

A Single Latent Plant Growth-Promoting Endophyte BH46 Enhances Thunb. Yield and Quality.

Plant growth-promoting endophytes (PGPE) can effectively regulate plant growth and metabolism. The regulation is modulated by metabolic signals, and the resulting metabolites can have considerable effects on the plant yield and quality. Here, tissue culture Thunb.

Endophytic Pseudomonas fluorescens promotes changes in the phenotype and secondary metabolite profile of Houttuynia cordata Thunb.

The interactions between microbes and plants are governed by complex chemical signals, which can forcefully affect plant growth and development. Here, to understand how microbes influence Houttuynia cordata Thunb. plant growth and its secondary metabolite through chemical signals, we established the interaction between single bacteria and a plant.

An assembled bacterial community associated with L. causes plant protection against a pathogenic fungus.

The microorganisms associated with a plant influence its growth and fitness. These microorganisms accumulate on the aerial and root surfaces of plants, as well as within the plants, as endophytes, although how the interaction between microorganisms protects the plant from pathogens is still little understood. In the current study, the impact of assembled the bacterial communities against the pathogenic fungus to promote L.

Latent Pathogenic Fungi in the Medicinal Plant Thunb. Are Modulated by Secondary Metabolites and Colonizing Microbiota Originating from Soil.

Latent pathogenic fungi (LPFs) affect plant growth, but some of them may stably colonize plants. LPFs were isolated from healthy rhizomes to reveal this mechanism and identified as , an unidentified fungal sp., and .

Endophytic fungi stimulate the concentration of medicinal secondary metabolites in thunb.

Endophytic fungi usually establish a symbiotic relationship with the host plant and affect its growth. In order to evaluate the impact of endophytic fungi on the Chinese herbal medicinal plant Thunb., three endophytes isolated from the rhizomes of , namely (IL), unidentified fungal sp.

GC-MS analyses of the volatiles of Houttuynia cordata Thunb.

GC-MS is the basis of analysis of plant volatiles. Several protocols employed for the assay have resulted in inconsistent results in the literature. We developed a GC-MS method, which were applied to analyze 25 volatiles (α-pinene, camphene, β-pinene, 2-methyl-2-pentenal, myrcene, (+)-limonene, eucalyptol, trans-2-hexenal, γ-terpinene, cis-3-hexeneyl-acetate, 1-hexanol, α-pinene oxide, cis-3-hexen-1-ol, trans-2-hexen-1-ol, decanal, linalool, acetyl-borneol, β-caryophyllene, 2-undecanone, 4-terpineol, borneol, decanol, eugenol, isophytol and phytol) of Houttuynia cordata Thunb.

[Correlation analysis of nutrients and microorganisms in soils with polyphenols and total flavonoids of Houttuynia cordata].

The relationship of nutrients and microorganisms in soils with polyphenols and total flavonoids of Houttuynia cordata were investigated by measuring nutrients, enzyme activity, pH, concentrations of microbe phospholipid fatty acids (PLFAs) in soils, and determining concentrations of polyphenols and total flavonoids of H. cordata. The research is aimed to understand characteristics of the planting soils and improve the quality of cultivated H.

Quality evaluation of Houttuynia cordata Thunb. by high performance liquid chromatography with photodiode-array detection (HPLC-DAD).

A new, validated method, developed for the simultaneous determination of 16 phenolics (chlorogenic acid, scopoletin, vitexin, rutin, afzelin, isoquercitrin, narirutin, kaempferitrin, quercitrin, quercetin, kaempferol, chrysosplenol D, vitexicarpin, 5-hydroxy-3,3',4',7-tetramethoxy flavonoids, 5-hydroxy-3,4',6,7-tetramethoxy flavonoids and kaempferol-3,7,4'-trimethyl ether) in Houttuynia cordata Thunb. was successfully applied to 35 batches of samples collected from different regions or at different times and their total antioxidant activities (TAAs) were investigated. The aim was to develop a quality control method to simultaneously determine the major active components in H.

[Chemical constituents of Psammosilene tunicoides and bacteriostatic activity].

Objective: To study the chemical constituents and bacteriostatic activity of Psammosilene tunicoides.

Method: Such methods as silica gel column chromatography and gel column chromatography were adotped separate and purify the compounds, and their structures were indentified on the basis of their spectral data and physicochemical properties.

Result: Ten compounds were separated from ethanol extracts and identified as methyl-4-hydroxybenzoate (1), N-methylsaccharin (2), 3-hydroxy-4-methoxybenzoic acid (3), germanicol (4), tricosanoic acid (5), octacosane (6), amber acid (7), succinic acid (8), stellarine A (9), and oleanane-12-ene-3alpha, 16alpha-two hydroxy-23,28-acid (10).

[Researches on relationship between genetic differentiation and chemical variation of Cinnamomum migao].

Objective: To study the relationship between the genetic diversity and chemical variation of Cinnamomum migao.

Method: ISSR marker technique was used to research the genetic structure of 9 population, GC-MS was used to analyze the main ingredients of the volatile oil in C. migao.

Chemical Compositionand Anti-acetyl cholinesterase Activity of Flower Essential Oils of Artemisiaannuaat Different Flowering Stage.

The chemical composition of the essential oils of flower at the pre-flowering, full-flowering and post-flowering stage of A. annua was analyzed by GC and GC/MS and sixty-two components were identified. The main compounds in the pre-flowering oil were β-myrcene (37.

[Variation and regularity of volatile oil constituents in fruits of national medicine Cinnamomum migao].

Objective: To compare the constituents of the volatile oil in Cinnamomum migao from different regions of southwest in China in order to evaluate the quality of C. migao.

Method: GC-MS was employed to analyze the constituents of the volatile oil in C.