scholarly journals The Effects of Plant-Soil-Enzyme Interactions on Plant Composition, Biomass and Diversity of Alpine Meadows in the Qinghai-Tibetan Plateau

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Changting Wang ◽  
Genxu Wang ◽  
Wei Liu ◽  
Pengfei Wu
Keyword(s):  
Microbial Biomass ◽  
Plant Community ◽  
Aboveground Biomass ◽  
Enzyme Activities ◽  
Functional Group ◽  
Soil Enzyme ◽  
Soil Conditions ◽  
Plant Composition ◽  
Alpine Meadows ◽  
Plant Soil

Four different alpine meadow communities were studied to examine the effects of plant-soil-enzyme interactions on plant composition and diversity. Enzyme activities differed by meadow type, and in general were higher in the upper soil layers (0–10 and 10–20 cm) than in the 20–40 cm layer. Community differences in plant composition or functional group composition were reflected in plant biomass distribution. The identity of a species (or a functional group) was a greater determinant of ecosystem function than the number of plant species. A significant correlation was found between the coverage per functional group and the aboveground biomass of functional groups in four alpine meadows. Soil microbial biomass carbon (Cmic) and enzyme activity were each affected by both functional group biomass andCABin the different meadow types. The negative correlation between diversity andCABin theKTSmay be influenced by a high soil nutrients input as a result of a higher litter input because of high aboveground biomass. Soil enzyme activities have been related to soil physio-chemical characters and plant primary production to change in vegetation. The original soil conditions, plant community composition, and community productivity are very important in regulating plant community productivity and microbial biomass and activity.

scholarly journals Differences of soil enzyme activities and its influencing factors under different flooding conditions in Ili Valley, Xinjiang

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8531 ◽  
Author(s):  
Yulu Zhang ◽  
Dong Cui ◽  
Haijun Yang ◽  
Nijat Kasim
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Total Phosphorus ◽  
Enzyme Activities ◽  
Catalase Activity ◽  
Microbial Biomass Carbon ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Biomass Carbon

Background A wetland is a special ecosystem formed by the interaction of land and water. The moisture content variation will greatly affect the function and structure of the wetland internal system. Method In this paper, three kinds of wetlands with different flooding levels (Phragmites australis wetland (long-term flooding), Calamagrostis epigeios wetland(seasonal flooding) and Ditch millet wetland (rarely flooded)) in Ili Valley of Xinjiang China were selected as research areas. The changes of microbial biomass carbon, soil physical and chemical properties in wetlands were compared, and redundancy analysis was used to analyze the correlation between soil physical and chemical properties, microbial biomass carbon and enzyme activities (soil sucrase, catalase, amylase and urease). The differences of soil enzyme activities and its influencing factors under different flooding conditions in Ili Valley were studied and discussed. Result The results of this study were the following: (1) The activities of sucrase and amylase in rarely flooded wetlands and seasonally flooded wetlands were significantly higher than those in long-term flooded wetlands; the difference of catalase activity in seasonal flooded wetland was significant and the highest. (2) Redundancy analysis showed that soil organic carbon, dissolved organic carbon, total phosphorus and soil microbial biomass carbon had significant effects on soil enzyme activity (p < 0.05). (3) The correlation between soil organic carbon and the sucrase activity, total phosphorus and the catalase activity was the strongest; while soil organic carbon has a significant positive correlation with invertase, urease and amylase activity, with a slight influence on catalase activity. The results of this study showed that the content of organic carbon, total phosphorus and other soil fertility factors in the soil would be increased and the enzyme activity would be enhanced if the flooding degree was changed properly.

Soil enzyme activities and microbial biomass response to crop types on the terraces of the Loess Plateau, China

2018 ◽  
Vol 18 (5) ◽  
pp. 1971-1980 ◽  
Author(s):  
Li Xiao ◽  
Yimei Huang ◽  
Quanchao Zeng ◽  
Junfeng Zhao ◽  
Junying Zhou
Keyword(s):  
Microbial Biomass ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau ◽  
Crop Types

Drought effects on microbial biomass and enzyme activities in the rhizosphere of grasses depend on plant community composition

2011 ◽  
Vol 48 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Muhammad Sanaullah ◽  
Evgenia Blagodatskaya ◽  
Abad Chabbi ◽  
Cornelia Rumpel ◽  
Yakov Kuzyakov
Keyword(s):  
Microbial Biomass ◽  
Community Composition ◽  
Plant Community ◽  
Enzyme Activities ◽  
Plant Community Composition ◽  
Drought Effects

scholarly journals Rhizobium Inoculation Enhances the Resistance of Alfalfa and Microbial Characteristics in Copper-Contaminated Soil

2022 ◽  
Vol 12 ◽  
Author(s):  
Chengjiao Duan ◽  
Yuxia Mei ◽  
Qiang Wang ◽  
Yuhan Wang ◽  
Qi Li ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Enzyme Activities ◽  
Regulatory Mechanism ◽  
Soil Nutrient ◽  
Microbial Biomass Nitrogen ◽  
Soil System ◽  
Rhizobium Inoculation ◽  
Plant Soil ◽  
Cu Stress ◽  
Microbial Characteristics

Some studies have reported the importance of rhizobium in mitigating heavy metal toxicity, however, the regulatory mechanism of the alfalfa-rhizobium symbiosis to resist copper (Cu) stress in the plant-soil system through biochemical reactions is still unclear. This study assessed the effects of rhizobium (Sinorhizobium meliloti CCNWSX0020) inoculation on the growth of alfalfa and soil microbial characteristics under Cu-stress. Further, we determined the regulatory mechanism of rhizobium inoculation to alleviate Cu-stress in alfalfa through plant-soil system. The results showed that rhizobium inoculation markedly alleviated Cu-induced growth inhibition in alfalfa by increasing the chlorophyll content, height, and biomass, in addition to nitrogen and phosphorus contents. Furthermore, rhizobium application alleviated Cu-induced phytotoxicity by increasing the antioxidant enzyme activities and soluble protein content in tissues, and inhibiting the lipid peroxidation levels (i.e., malondialdehyde content). In addition, rhizobium inoculation improved soil nutrient cycling, which increased soil enzyme activities (i.e., β-glucosidase activity and alkaline phosphatase) and microbial biomass nitrogen. Both Pearson correlation coefficient analysis and partial least squares path modeling (PLS-PM) identified that the interactions between soil nutrient content, enzyme activity, microbial biomass, plant antioxidant enzymes, and oxidative damage could jointly regulate plant growth. This study provides comprehensive insights into the mechanism of action of the legume-rhizobium symbiotic system to mitigate Cu stress and provide an efficient strategy for phytoremediation of Cu-contaminated soils.

scholarly journals Rhizobium inoculation enhanced the resistance of alfalfa and soil enzymatic activity in Cu-polluted soils

2021 ◽  
Author(s):  
Chengjiao Duan ◽  
Yuxia Mei ◽  
Qiang Wang ◽  
Yuhan Wang ◽  
Qi Li ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Microbial Biomass ◽  
Enzyme Activities ◽  
Soil Nutrient ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Polluted Soils ◽  
Soil System ◽  
Rhizobium Inoculation ◽  
Cu Stress

Abstract Although some studies have reported an important role of rhizobia in mitigating heavy metal toxicity, the regulatory mechanism of the alfalfa-rhizobium symbiosis system to resist copper (Cu) stress through biochemical reactions in the plant-soil system is still unclear. Hence, this study assessed the effects of rhizobium inoculation (i.e., Sinorhizobium meliloti CCNWSX0020) on the growth of alfalfa and soil enzyme activities under Cu stress. Our results showed that rhizobium inoculation markedly alleviated Cu-induced growth inhibition by increasing chlorophyll content, height and biomass and the contents of nitrogen and phosphorus in alfalfa. The content of malondialdehyde (MDA) was increased in both shoot and root of alfalfa under Cu stress. The application of rhizobium alleviated Cu-induced phytotoxicity by increasing the activity of antioxidant enzymes and soluble protein content of tissues and inhibiting the level of lipid peroxidation (i.e., MDA level). In addition, rhizobium inoculation improved soil nutrient cycling, increased soil enzyme activities (i.e., β-glucosidase activity and alkaline phosphatase) and microbial biomass nitrogen. Both Pearson correlation coefficient analysis and partial least squares path modeling (PLS-PM) identified that the interactions between soil nutrient content, enzyme activity, microbial biomass and plant antioxidant enzymes and oxidative damage could jointly regulate plant growth. This study provides comprehensive insights into the mechanism of action of the legume-rhizobium symbiosis system to mitigate Cu stress and provide an efficient strategy for phytoremediation of Cu-polluted soils.

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