The Experts below are selected from a list of 2124 Experts worldwide ranked by ideXlab platform
Yongjun Jiang - One of the best experts on this subject based on the ideXlab platform.
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seasonal transpiration dynamics of evergreen Ligustrum Lucidum linked with water source and water use strategy in a limestone karst area southwest china
Journal of Hydrology, 2021Co-Authors: Hamid M Behzad, Ying Bai, Yongjun JiangAbstract:Abstract Transpiration dynamics of karst ecosystems are not conditioned only by the shallow-soil water status, mainly because of the presence of deep-water source pools formed within the underlying bedrock if trees can develop their deep roots to the pools. However, the strength of these relationships and how as well as why they can vary from an area to another and from season to season are poorly understood, due primarily to high heterogeneity of karst ecosystems. Therefore, the present study was conducted during 2018-2019 rainy and dry seasons in a subtropical (limestone) karst area on southwest China to explore the functional responses to reduced water availability of evergreen Ligustrum Lucidum (Chinese glossy privet) growing on the shallow soils. Seasonal variations in the transpiration, water-use patterns, and water sources were investigated for Ligustrum Lucidum through high-resolution monitoring of the micrometeorology, sap flow, and soil moisture data, in combination with the carbon stable isotope composition of the tree leaves, as well as oxygen and hydrogen stable isotope composition of the tree stem, soil, and deep water. Our findings showed that high transpiration rates of Ligustrum Lucidum were mainly associated with the soil moisture during rainy seasons (87% in total) but the low rates were associated primarily with the deep-water sources during dry seasons (13% in total). During the rainy season, when plenty of water was available to the plant, Ligustrum Lucidum tended to obtain water inexpensively through the soil layers (on average, 59%) and consumed it profligately through reduction of its water use efficiency (WUEi) (mean WUEi rainy-season = 82.6 μmol/mol). In contrast, during the dry season, when limited water was available to the plant resulting from the significant reduction in rainfall, Ligustrum Lucidum had to obtain the water expensively (albeit at a small amount) through deep-water source pools (on average, 62%), and consumed it conservatively through increasing its WUEi (mean WUEi rainy-season = 108.6 μmol/mol). Our findings can provide the insights into temporal transpiration dynamics as well as the strategies and mechanisms adopted by the plants to counteract the seasonal drought stress associated with the shallow soils in karst ecosystems.
Yang Song - One of the best experts on this subject based on the ideXlab platform.
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Microwave-Assisted Extraction of Oleanolic Acid and Ursolic Acid from Ligustrum Lucidum Ait
International journal of molecular sciences, 2011Co-Authors: En-qin Xia, Bo-wei Wang, Li-li Zhu, Yang SongAbstract:Oleanolic acid and ursolic acid are the main active components in fruit of Ligustrum Lucidum Ait, and possess anticancer, antimutagenic, anti-inflammatory, antioxidative and antiprotozoal activities. In this study, microwave-assisted extraction of oleanolic acid and ursolic acid from Ligustrum Lucidum was investigated with HPLC-photodiode array detection. Effects of several experimental parameters, such as type and concentration of extraction solvent, ratio of liquid to material, microwave power, extraction temperature and microwave time, on the extraction efficiencies of oleanolic acid and ursolic acid from Ligustrum Lucidum were evaluated. The influence of experimental parameters on the extraction efficiency of ursolic acid was more significant than that of oleanolic acid (p < 0.05). The optimal extraction conditions were 80% ethanol aqueous solution, the ratio of material to liquid was 1:15, and extraction for 30 min at 70 °C under microwave irradiation of 500 W. Under optimal conditions, the yields of oleanolic acid and ursolic acid were 4.4 ± 0.20 mg/g and 5.8 ± 0.15 mg/g, respectively. The results obtained are helpful for the full utilization of Ligustrum Lucidum, which also indicated that microwave-assisted extraction is a very useful method for extraction of oleanolic acid and ursolic acid from plant materials.
Zhiwu Zhang - One of the best experts on this subject based on the ideXlab platform.
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In vitro immunomodulatory effects of an oleanolic acid-enriched extract of Ligustrum Lucidum fruit (Ligustrum Lucidum supercritical CO2 extract) on piglet immunocytes.
International immunopharmacology, 2012Co-Authors: Jiali Wang, Anshan Shan, Tianyang Liu, Chao Zhang, Zhiwu ZhangAbstract:This study was conducted to evaluate the in vitro immunomodulatory effects of supercritical CO(2)Ligustrum Lucidum extract (LLE) on the immune cells of piglets. The results showed that the LLE enhanced the proliferative activity of piglet blood lymphocytes and up-regulated the CD4(+) CD8(+) and CD4(+) CD8(-) cell populations. The LLE also regulated the expression of Th1- and Th2-related cytokines; elevated the levels of IL-2, IFN-γ and TNF-α, which were produced by Th1 lymphocytes; and decreased the levels of IL-4 and IL-10, which were produced by Th2 lymphocytes. Furthermore, the LLE stimulated the NO secretion of lymphocytes. These results indicated that LLE might have potential immunomodulatory effects on the immune system of piglets and provided scientific and experimental foundations for the development of a new kind of LLE immune adjuvant in the pig production.
Hamid M Behzad - One of the best experts on this subject based on the ideXlab platform.
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seasonal transpiration dynamics of evergreen Ligustrum Lucidum linked with water source and water use strategy in a limestone karst area southwest china
Journal of Hydrology, 2021Co-Authors: Hamid M Behzad, Ying Bai, Yongjun JiangAbstract:Abstract Transpiration dynamics of karst ecosystems are not conditioned only by the shallow-soil water status, mainly because of the presence of deep-water source pools formed within the underlying bedrock if trees can develop their deep roots to the pools. However, the strength of these relationships and how as well as why they can vary from an area to another and from season to season are poorly understood, due primarily to high heterogeneity of karst ecosystems. Therefore, the present study was conducted during 2018-2019 rainy and dry seasons in a subtropical (limestone) karst area on southwest China to explore the functional responses to reduced water availability of evergreen Ligustrum Lucidum (Chinese glossy privet) growing on the shallow soils. Seasonal variations in the transpiration, water-use patterns, and water sources were investigated for Ligustrum Lucidum through high-resolution monitoring of the micrometeorology, sap flow, and soil moisture data, in combination with the carbon stable isotope composition of the tree leaves, as well as oxygen and hydrogen stable isotope composition of the tree stem, soil, and deep water. Our findings showed that high transpiration rates of Ligustrum Lucidum were mainly associated with the soil moisture during rainy seasons (87% in total) but the low rates were associated primarily with the deep-water sources during dry seasons (13% in total). During the rainy season, when plenty of water was available to the plant, Ligustrum Lucidum tended to obtain water inexpensively through the soil layers (on average, 59%) and consumed it profligately through reduction of its water use efficiency (WUEi) (mean WUEi rainy-season = 82.6 μmol/mol). In contrast, during the dry season, when limited water was available to the plant resulting from the significant reduction in rainfall, Ligustrum Lucidum had to obtain the water expensively (albeit at a small amount) through deep-water source pools (on average, 62%), and consumed it conservatively through increasing its WUEi (mean WUEi rainy-season = 108.6 μmol/mol). Our findings can provide the insights into temporal transpiration dynamics as well as the strategies and mechanisms adopted by the plants to counteract the seasonal drought stress associated with the shallow soils in karst ecosystems.
En-qin Xia - One of the best experts on this subject based on the ideXlab platform.
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Microwave-Assisted Extraction of Oleanolic Acid and Ursolic Acid from Ligustrum Lucidum Ait
International journal of molecular sciences, 2011Co-Authors: En-qin Xia, Bo-wei Wang, Li-li Zhu, Yang SongAbstract:Oleanolic acid and ursolic acid are the main active components in fruit of Ligustrum Lucidum Ait, and possess anticancer, antimutagenic, anti-inflammatory, antioxidative and antiprotozoal activities. In this study, microwave-assisted extraction of oleanolic acid and ursolic acid from Ligustrum Lucidum was investigated with HPLC-photodiode array detection. Effects of several experimental parameters, such as type and concentration of extraction solvent, ratio of liquid to material, microwave power, extraction temperature and microwave time, on the extraction efficiencies of oleanolic acid and ursolic acid from Ligustrum Lucidum were evaluated. The influence of experimental parameters on the extraction efficiency of ursolic acid was more significant than that of oleanolic acid (p < 0.05). The optimal extraction conditions were 80% ethanol aqueous solution, the ratio of material to liquid was 1:15, and extraction for 30 min at 70 °C under microwave irradiation of 500 W. Under optimal conditions, the yields of oleanolic acid and ursolic acid were 4.4 ± 0.20 mg/g and 5.8 ± 0.15 mg/g, respectively. The results obtained are helpful for the full utilization of Ligustrum Lucidum, which also indicated that microwave-assisted extraction is a very useful method for extraction of oleanolic acid and ursolic acid from plant materials.
