Effects of arbuscular mycorrhizal fungi on the growth and Ce uptake of maize grown in Ce-contaminated soils

被引：0
|
作者：
Wang F. [1 ]
Guo W. [1 ]
Ma P.-K. [1 ]
Pan L. [1 ]
Zhang J. [2 ]
机构：
[1] College of Environment and Resources, Inner Mongolia University, Hohhot
[2] College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot
来源：
Huanjing Kexue/Environmental Science | 2016年 / 37卷 / 01期
关键词：
Arbuscular mycorrhizal fungi; Ce uptake; Ce-contaminated soils; Maize; Plant growth;
D O I：
10.13227/j.hjkx.2016.01.040
中图分类号：
学科分类号：
摘要：
A greenhouse pot experiment was conducted to investigate the effects of arbuscular mycorrhizal (AM) fungi Glomus aggregatum (GA) and Funneliformis mosseae (FM) on AM colonization rate, biomass, nutrient uptake, C:N:P stoichiometric and Ce uptake and transport by maize (Zea mays L.) grown in soils with different levels of Ce-contaminated (100, 500 and 1000 mg·kg-1). The aim was to provide basic data and technical support for the treatment of soils contaminated by rare earth elements. The results indicated that symbiotic associations were successfully established between the two isolates and maize, and the average AM colonization rate ranged from 7.12% to 74.47%. The increasing concentration of Ce in soils significantly decreased the mycorrhizal colonization rate, biomass, nutrition contents and transport rate of Ce from root to shoot of maize, and significantly increased C:P and N:P ratios and Ce contents in shoot and root of maize. Both AM fungi inoculations promoted the growth of maize, but the promoting role of FM was more significant than that of GA in severe Ce-contaminated soils. There were no significant differences in the growth of maize between two AM fungi in mild and moderate Ce-contaminated soils. Inoculation with AM fungi significantly improved nutritional status of maize by increasing nutrient uptake and decreasing C:N:P ratios. GA was more efficient than FM in enhancing nutrient uptake in mild and moderate Ce-contaminated soils, while FM was more efficient in severe Ce-contaminated soils. Moreover, inoculation with AM fungi significantly increased Ce contents of shoot and root in mild Ce-contaminated soils, but had no significant effect on Ce contents of maize in moderate and severe Ce-contaminated soils, and promoted the transport of Ce from root to shoot. The experiment demonstrates that AM fungi can alleviate toxic effects of Ce on plants and have a potential role in the phytoremediation of soils contaminated by rare earth elements. © 2016, Science Press. All right reserved.
引用
收藏
页码：309 / 316
页数：7
相关论文
共 22 条
  • [1] Hallet P.D., Feeney D.S., Bengough A.G., Et al., Disentangling the impact of AM fungi versus roots on soil structure and water transport, Plant and Soil, 314, 1-2, pp. 183-196, (2009)
  • [2] Grunwald U., Guo W.B., Fischer K., Et al., Overlapping expression patterns and differential transcript levels of phosphate transporter genes in arbuscular mycorrhizal, P-i-fertilised and phytohormone-treated Medicago truncatula roots, Planta, 229, 5, pp. 1023-1034, (2009)
  • [3] Karimi A., Khodaverdiloo H., Sepehri M., Et al., Arbuscular mycorrhizal fungi and heavy metal contaminated soils, African Journal of Microbiology Research, 5, 13, pp. 1571-1576, (2011)
  • [4] Cameron D.D., Arbuscular mycorrhizal fungi as (agro) ecosystem engineers, Plant and Soil, 333, 1-2, pp. 1-5, (2010)
  • [5] Chen X.H., Zhao B., Arbuscular mycorrhizal fungi mediated uptake of lanthanum in Chinese milk vetch (Astragalus sinicus L.), Chemosphere, 68, 8, pp. 1548-1555, (2007)
  • [6] Chen X.H., Zhao B., Arbuscular mycorrhizal fungi mediated uptake of nutrient elements by Chinese milk vetch (Astragalus sinicus L.) grown in lanthanum spiked soil, Biology and Fertility of Soils, 45, 6, pp. 675-678, (2009)
  • [7] Phillips J.M., Hayman D.S., Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection, Transactions of the British Mycological Society, 55, 1, pp. 158-161, (1970)
  • [8] Biermann B., Linderman R.G., Quantifying vesicular-arbuscular mycorrhizae: a proposed method towards standardization, New Phytologist, 87, 1, pp. 63-67, (1981)
  • [9] Bedini S., Pellegrino E., Avio L., Et al., Changes in soil aggregation and glomalin-related soil protein content as affected by the arbuscular mycorrhizal fungal species Glomus mosseae and Glomus intraradices, Soil Biology and Biochemistry, 41, 7, pp. 1491-1496, (2009)
  • [10] Wang C.R., Luo X., Tian Y., Et al., Biphasic effects of lanthanum on Vicia faba L. seedlings under cadmium stress, implicating finite antioxidation and potential ecological risk, Chemosphere, 86, 5, pp. 530-537, (2012)
123