선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
문제 정의
- Use of Am fungi has shown a possibility in FAHs remediation. The objectives of this study were to investigate the effect of Am on plant-uptake, accumulation and efficacy dissipation of RAHs in the soil contaminated with PAHs. The levels of root colonization by Glomus, moseae were monitored during the phytoremediation process.
제안 방법
- The levels of root colonization by Glomus, moseae were monitored during the phytoremediation process. Based on the studies, Am fungal contributions to the plant-enhanced remediation for soil PAH contaminants were evaluated.
대상 데이터
- Experimental t* reatments The experiment examined factorial combinations of 1) two soil types (non-spiked or spiked), 2) two soil states (unplanted or planted), 3) two mycorrhizal treatments (non-inoculated or inoculated with Glomus mosseae. Five replications per each treatment were used to give a total 40 pots for the three pi가nt species used in this investigation.
데이터처리
- Statistical analysis: Statistical analysis of the results was subjected to least significant difference (L.S.D.), ANOVA and Pearson correlation coefficient. Significance was set at *P < 0.
성능/효과
- The loss of PAHs denoted the abiotic dissipation of these compounds by surface sorption, photo-oxidation or volatization. After 65 days, the loss of PAHs in unplanted soil was averaged 173 mg kg 1 soil pot"1 and the mean dissipation ratios of these compounds were 11.2%. In microb-inhibited unplanted soil, the mean dissipation amount of B\Hs was 126 mg kg~l soil pof1 with dissipation ratio 8.
- Three Am and non-Am plant species, wheat, mungbean and eggplant, were tested for their ability to remove PAHs from contaminated soil. After 65 days, there was no significantly difference between the three species of non- Am plants with respect to PAH removal (Table 3). Inoculation of the plants with Am fungus increased PAH removal from the soil and there was significantly difference between Am and non-Am mungbean and wheat plants (Table 3).
- This study showed that Am fungal inoculation enhanced dissipation amount of PAHs in planted spiked soil, plant promoted removal PAHs and loss of P\Hs by the plant- promoted biodegradation. In addition, the results also revealed that the enhanced dissipation of PAHs would overwhelmingly drive direct uptake and accumulation of PAH by plant and promoted biodegradation. However, amount of PAHs directly accumulated by the tested plant contributed 2% to 6% in the enhancement in dissipation of RAHs.
- Am plants showed high significant PAHs concentration than non-Am one. In the presence of Am fungi, the concentrations of PAHs in wheat, mungbean and eggplant plants increased by nearly 174%, 215% and 24% respectively, compared with those of in absence of Am fungi. Root accumulation of PAHs also significantly enhanced by Am infection in mungbean and wheat plants.
- Under stress conditions, it is important for plants to maintain water content in the tissue. It was found that the of water content of non-Am plants in spiked soil increased by 2.8% and 49% for wheat and mungbean plants respectively (Table 6). In non-Am eggplants water content was decreased by 21% in spiked soil.
- By contrast, the lipids in roots, even at small amounts, were usually the major reservoir for highly water insohible contaminants. Results of our study indicate that root lipid content might be a good predictor for root accumulation of PAHs. This is in some way, consistent with the observations by Paterson and Mackay, 1994; Simonich and Hites, 1995; Petersen et al.
- With inoculation of Am fungi, the inhibitory effect of FAHs on root/shoot ratios was greatly diminished in wheat (3% reduction) and mungbean (3% increase) while in eggplant it was increased to 50% of control. The results also revealed the VAM symbionts had more pronounced effect in spiked soil than un-spiked one on root/shoot ratios of wheat and mungbean. Mycorrhizal effect on root/shoot ratio was increased from 17% to 100% for wheat and from 15% to 133% for mungbean but it decreased from 27% to 11% for eggplant in un- spiked and spiked soil respectively (Table 6).
- The results in this study revealed that the plant did enhance the remediation in contamination of soil with PAH. Inoculation of plants with Am increased plant survival and growth in contaminated soil.
- , 1999; Newman and Charles, 2005). The results in this study showed increases in activities of several enzyme and microbial number in the rhizospheric soil and plants with mycorrhiza, suggesting that enzymatic oxidation with the microbial degradation is one of the important effects in PAH remediation strategy. The positive correlation observed between Am infection and the enzyme activity in the present study could be indicative of the enzyme activity stimulated by the presence of Am fungi.
- The results of this study showed that microbial numbers in rhizosphere of Am plants were much higher than that of non-Am one. This is consistent with the order of enzyme activity as well as PAHs dissipations in the spiked soil.
- This study showed that Am fungal inoculation enhanced dissipation amount of PAHs in planted spiked soil, plant promoted removal PAHs and loss of P\Hs by the plant- promoted biodegradation. In addition, the results also revealed that the enhanced dissipation of PAHs would overwhelmingly drive direct uptake and accumulation of PAH by plant and promoted biodegradation.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.