scholarly journals The Characteristics of Habitat, Functional Traits and Medicinal Components of Eucommia Ulmoides From Guizhou

2021 ◽  
Author(s):  
Changjiang Qian ◽  
Rongrong Zhang ◽  
Jia Li ◽  
Zongsheng Huang ◽  
Xun Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Species Diversity ◽  
Chlorogenic Acid ◽  
Functional Traits ◽  
Steep Slope ◽  
Root Bark ◽  
Eucommia Ulmoides ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Shrub Layer

Abstract To find out the genuine characteristics of Eucommia ulmoides produced in Guizhou.The habitat, functional characters and the content of medicinal components of Eucommia ulmoides in Guizhou were studied by using the method of sample survey combined with typical survey, related laboratory experiments and quantitative analysis. The results showed that the yield of Eucommia ulmoides plantation in Guizhou was divided into low altitude, low middle and high temperature rain slope latitude mixing, short sunshine type(A type), medium altitude, low longitude and latitude, high temperature rain, positive oblique steep slope, medium sunshine type (B type), Middle altitude, low longitude and latitude, moderate high temperature rain, Shady side and Sunny side have gentle deflection steep slope, medium sunshine type (C type), High altitude, low longitude and latitude, low temperature moderate rain, positive gentle slope, long sunshine type (D type); Different types of Eucommia ulmoides plantation, Different habitat quality, B type is intensity karst rocky desertification habitat, A type is potential karst rocky desertification habitat,The C and D types are light and moderate rocky desertification areas respectively, The species diversity of shrub layer in Eucommia ulmoides plantation was higher in D type and B type, A type and C type followed; There was no significant difference in root carbon content and leaf nitrogen content in 4 types of Eucommia ulmoides plantation, Among the four types of A、B、C、D, there were significant or extremely significant differences in other indexes of plant functional traits; Both genipinic acid and aucubin had the highest content of root bark, followed by trunk bark and lowest leaves, Chlorogenic acid is the opposite, The content of geniposide was higher in trunk bark and lower in root bark and leaves; Genipinic acid is higher in D type, Aucubin is higher in A and D type, Chlorogenic acid has higher leaves content in B type, Geniposide was the highest in trunk bark of D type; The element enrichment coefficient K and Mn leaves are the largest, the largest in trunk bark is Ca and Zn, Fe root bark is the largest; Effects of soil potassium, phosphorus, pH value and bulk weight on the functional traits of Eucommia ulmoides were significant. The contents of medicinal components in root bark, trunk bark and leaves was influenced by species diversity of shrub layer, The contents of geniposide in root bark, aucubin in root bark and trunk bark, genipinic acid in bark and chlorogenic acid in leaves were particularly affected by soil physical and chemical indexes and metal element contents, The functional traits of Eucommia ulmoides can affect the content of medicinal components in root bark, trunk bark and leaves, Especially on the root bark, trunk bark and leaves in the content of aucubin content; The content of medicinal components of Eucommia ulmoides was high and stable. The above research results have important theoretical reference significance for the cultivation of Eucommia ulmoides and the cultivation of target medicinal components and the comprehensive exploitation and utilization of resources.

The Relationship between Soil Characteristics and Community Structure in Different Vegetation Restoration in Guangxi Karst Region

2013 ◽  
Vol 726-731 ◽  
pp. 4172-4176
Author(s):  
Sheng Li ◽  
Hua Dong Ren ◽  
Liang Xue ◽  
Xiao Hua Yao
Keyword(s):  
Species Diversity ◽  
Total Nitrogen ◽  
Karst Region ◽  
Available Phosphorus ◽  
Herb Layer ◽  
Closing Time ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Shrub Layer ◽  
Tree Layer

The space instead of time method was used to determine the species diversity and soil property in different succession stages in Karst rocky desertification area, in China. The species diversity of herb layer was digressive and that of tree layer, shrub layer and the whole community were increased first and then decreased, the peak value appeared in the rattan thorn scrub stage, the lowest appeared in the grass stages. At the beginning of succession, the species diversity of herb layer was higher than that of shrub layer. With the closing time increased, the diversity of the shrub layer increased more than that of herb layer. There had the same change trend in velocity nitrogen, organic matter, total nitrogen and total phosphorus. There was significantly linear positive correlation between the total nitrogen, phosphorus, magnesium, calcium, pH, available phosphorus and the species diversity and richness of the herb layer.

Optimization of the Extraction Technology and Assessment of Antioxidant Activity of Chlorogenic Acid-Rich Extracts From Eucommia ulmoides Leaves

2021 ◽  
Vol 16 (10) ◽  
pp. 1934578X2110461
Author(s):  
Hua Jiang ◽  
Jun Li ◽  
Ning Zhang ◽  
Hai-Yang He ◽  
Jia-Min An ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chlorogenic Acid ◽  
Ph Value ◽  
Extraction Process ◽  
Eucommia Ulmoides ◽  
Extraction Technology ◽  
Dpph Method ◽  
Contour Plots ◽  
Technology And Assessment ◽  
Design Optimum

Chlorogenic acid has been proved to have cardiovascular protection, antibacterial, antiviral, hemostatic, and hypolipidemia effects. Modern scientific research on the bioactivity of chlorogenic acid has been extended to the fields of food, medicine, health care and daily-use chemical industry. The aim of this research was to optimize the extraction conditions for chlorogenic acid from Eucommia ulmoides (Eucommiaceae) leaves. The significant variables were screened and optimized by a combination of Plackett-Burman test and Box-Behnken design. Optimum extraction parameters with ethanol concentration of 50%, solvent pH value of 3, and particle size of 60 mesh were determined according to variance analysis and contour plots. Under these conditions, the yield of chlorogenic acid was up to 4.36 mg/g, which was basically consistent with the theoretical prediction value of 4.50 mg/g. This study also proved the potential antioxidant activity of E. ulmoides leaves. The optimal extract of E. ulmoides leaves rich in chlorogenic acid showed the highest antioxidant activity in the FRAP method, which was 219.8 μM Trolox equivalents (TE) per g extract weight (EW) (μM TE/g EW). The DPPH method gave a similar value (168 μM TE/g EW) to the ABTS method (152 μM TE/g EW). The established extraction process was efficient in the recovery of chlorogenic acid from E. ulmoides leaves, encouraging its valorization as a cheap and sustainable alternative for the isolation of chlorogenic acid.

scholarly journals Seasonal variations in response of periphytic algal community to nutrient enrichment in the river Ganga (Varanasi, India)

2018 ◽  
Vol 54 ◽  
pp. 32 ◽  
Author(s):  
Arpana Yadav ◽  
Dhananjay Kumar ◽  
Ram Sharan Singh ◽  
Lalit K. Pandey ◽  
Jyoti Rai
Keyword(s):  
High Temperature ◽  
Species Diversity ◽  
River Water ◽  
Green Algae ◽  
Nutrient Enrichment ◽  
Seasonal Variations ◽  
Algal Community ◽  
Phosphate Limitation ◽  
River Ganga ◽  
Time Periods

Effect of nutrient enrichment on periphyton was studied using chemical diffusing substrates that released, singly or in combination, PO43−-P and nitrogen, both NO3−-N and NH4+-N. The study was carried out in March and June 2014 as these two time periods showed abundance of different groups of algae. Whereas diatoms and green algae were abundant in March, cyanobacteria dominated in June. Nitrogen was primarily growth limiting in river water as its enrichment enhanced the growth of periphyton. Phosphate limitation was secondary in nature. Enrichment of NH4+-N caused greater enhancement of periphytic growth than that of NO3−-N. Nutrient enrichment reduced species diversity, further enhancing total biovolume of the periphytic group that was predominant at that particular point of time. Nutrient enrichment markedly increased cyanobacterial populations in June due inter alia to high temperature. In spite of nutrient enrichment, the periphytic biomass did not reach the level (chla≥ 100–150 mg m−2) considered as the nuisance, except in March when combined enrichment of PO43−-P and NO3−-N greatly enhanced the periphytic biomass.

scholarly journals Discussing the Genesis of Karst Rocky Desertification-research Based on the Correlations between Crop land and Settlement in Typical Peak-cluster Depressions

2016 ◽  
Author(s):  
Yang Bing Li ◽  
Qiong Yao Li ◽  
Guang Jie Luo ◽  
Xiao Yong Bai ◽  
Yong Yan Wang ◽  
...  
Keyword(s):  
Population Pressure ◽  
Guizhou Province ◽  
Residential Areas ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Peak Cluster ◽  
Natural Mechanism ◽  
The Relationship ◽  
Local Farmers

Abstract. This paper attempts to explain the theoretical reasons why the local farmers took irrational activities such as steep slope land cultivations in order to reveal the mechanism of Karst Rocky Desertification (KRD) through those typical case studies. Firstly, this paper assumes that the low land capacity is the genesis cause of KRD in peak cluster-depression areas. Furthermore, the ecological quality of the peak cluster-depression zone is influenced by the relationship between the area of depressions and the population of residential areas. The results show that, six typical peak cluster-depression areas in Guizhou Province were selected to compare the distribution circumstances of croplands, the characteristics of settlements and the formation of KRD. Also, the results show that there is a negative correlation between the percentage of the cultivated land and the percentage of KRD (including light KRD, moderate KRD and severe KRD at peak cluster-depressions. The relationship could be concluded as three situations of the process of KRD, which are low, middle and upper carrying capacity of land. The severe KRD is only distributed in peak-cluster depression areas with less flatland, low land capacity and high population. The harmonization between population pressure and bearing capacity of land will influence the ecological qualities in the peak cluster depressions. Therefore, the hypothesis suggested by this paper is correct, and this result will contribute to understanding the natural mechanism of KRD and guide the ecological restoration of KRD land.

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