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The Reed Mycorrhizal Fungi Dependence and the Studies of Combinational Environmental Remediation

Author: LiShiYang
Tutor: MaFang；WangLi
School: Harbin Institute of Technology
Course: Environmental Science and Engineering
Keywords: Mycorrhizal fungi Ecological restoration Wetland Water pollution
CLC: X172
Type: Master's thesis
Year: 2010
Downloads: 146
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Abstract


With the economic and social development and progress, environmental issues and more prominent, environmental pollution situation is more complex in recent years, from the previous single pollutant point source pollution, the development of complex mixture of contaminants point source pollution, in the face of the forms pollution, conventional one treatment process to not effectively solve the problem, we need to be able to adapt to this kind of complex processes and technologies. To solve this problem, through the integration of ecological restoration theories have been proposed, the use of the complexity of the ecosystem, and then enhanced by mycorrhizal fungi in plant complex systems to achieve a decent source of water pollution in ecological restoration purposes. Mycorrhizal fungi are ubiquitous in nature a symbiotic fungus that can infect the roots of plants and micro-organisms and plants can enhance purification capacity. Previous studies on mycorrhizal fungi for soil pollution, water pollution for the application of few studies. In order to prove the feasibility of the idea, the first of natural wetland environment, water pollutant removal mycorrhizal fungi on whether a certain role to investigate. Zhalong wetland survey found that the presence of mycorrhizal fungi and permanganate index was significantly positively correlated with the characteristics of pollutants and volatile phenols was a significant positive correlation, and evaluated the distribution of mycorrhizal ZHALONG region and water quality, the water quality was Ⅴ water bodies, water quality deterioration, and the distribution of basic and water mycorrhizal gradient coupling. Reeds by further laboratory culture, research mycorrhizal laws come reed vegetative reproduction means training speed, germination rate, large biomass, but biomass of large differences within the group; reeds by sexual reproduction germination is slow, germination rate, biomass within the same incubation time was significantly lower than vegetative reproduction. For the actual planting reeds provide technical support. Simultaneously by comparing different times and different inoculation inoculation to vaccination found that although the impact of different times and different inoculum on Reed's infection rate has little effect, but the infection rate really are at a significant level, the average infection rate high at 70%, significantly higher than the natural state, and the biomass was significantly higher than the control. A pot experiment static purification method of purification of natural wetlands to simulate experiments show that there is infested potted plants for high purification effect of permanganate index higher than 45% of infected plants, and the degradation of phenol has a significant effect, and mycorrhizal fungi to improve plant biomass results also illustrate reeds in intraspecific competition and pollution stress dependence on mycorrhizal fungi, while purifying effect explain the presence of mycorrhizal fungi can effectively improve the efficiency of the degradation of pollutants, and ecological restoration in improving complex systems and systems for pollution impact resistance play a significant role. Mycorrhizal fungi and aquatic ecological restoration technology combined with the application of the feasibility and efficiency has been verified, but after PCR-DGGE analysis of potted plants inoculated with mycorrhizal fungi in the rhizosphere microbial diversity significantly increased, indicating that mycorrhizal fungi plant complex system used in ecological restoration technology is entirely feasible.

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