Improving revegetation of oil sands reclamation sites with mycorrhizal ericaceous plants

用菌根杜鹃花改善油砂填海区的植被恢复

• 批准号: 543691-2019
• 负责人: Zwiazek, Janusz
• 金额: $ 5.77万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699616
• 关键词: Improving; revegetation; oil; sands; reclamation

Ericaceous plants have been difficult to establish in oil sands reclamation areas due to their dependence on ericoid mycorrhizal associations for survival in harsh environments. Ericaceous plants play important ecological roles in the boreal forests. Therefore, their successful re-establishment in oil sands areas is among the reclamation priorities for the oil sands industry. In an earlier study, we demonstrated that a common reclamation practice involving soil stockpiling is detrimental to ericaceous plants. Even a relatively short, one-year, duration of stockpiling resulted in a drastic decrease in the abundance and diversity of root ericoid mycorrhizal (ERM) fungi affecting plant growth and survival. We also showed that the re-establishment of ericaceous plants in oil sands reclaimed areas is not likely to be successful without the presence of appropriate types of ERM fungi. It has been previously established that high soil pH and frequent episodes of drought are common detrimental factors affecting plant growth in reclamation sites. The proposed project addresses these concerns by carrying out controlled-environment and field studies to investigate different approaches that could be used to improve survival and growth of ericaceous plants in oil sands reclamation areas. The project also aims at better understanding of the plant-mycorrhizal interactions that improve high soil pH tolerance and plant water relations in ERM plants. The principal long-term objective of the proposed study is to contribute new knowledge that can be used to improve the reveteation of oil sands areas with ERM mycorrhizal plants. Specific objectives are to: 1) Develop the methods that could be used to enhance revegetation potential of stockpiled reclamation soil by inoculating roots with different ERM cultures, 2) Examine the effects of stockpiling duration on ERM inoculation potential and growth of plants, 3) Determine pH tolerance of various ERM associations, and 4) Examine the processes contributing to enhanced drought resistance in blueberry plants colonized with the ERM fungi Pezoloma ericae and Meliniomyces variabilis.

在油砂复垦区，由于其在恶劣环境下的生存依赖于ericioid菌根关联，因此很难在油砂复垦区建立ericioid菌根。白垩系植物在北方针叶林中起着重要的生态作用。因此，它们在油砂地区的成功重建是油砂行业的复垦重点之一。在早期的一项研究中，我们证明了一种涉及土壤储存的常见开垦做法对白垩系植物有害。即使是相对较短的1年储藏时间，也会导致根类菌根真菌（ERM）的丰度和多样性急剧下降，影响植物的生长和存活。我们还表明，如果没有适当类型的ERM真菌的存在，油砂复垦区重建白垩系植物是不可能成功的。以前已经确定，高土壤pH值和频繁的干旱是影响填海地点植物生长的常见有害因素。拟议的项目通过进行受控环境和实地研究来解决这些问题，以调查可用于改善油砂填海地区白垩系植物生存和生长的不同方法。该项目还旨在更好地了解植物与菌根的相互作用，这些相互作用可以提高ERM植物的高土壤pH耐受性和植物水分关系。提出的研究的主要长期目标是提供新的知识，可用于改善油砂地区的ERM菌根植物的启示。具体目标是：1)研究通过接种不同ERM培养物来提高储藏垦殖土壤复育潜力的方法；2)研究储藏时间对ERM接种潜力和植株生长的影响；3)确定各种ERM组合的pH耐受性；4)研究ERM真菌Pezoloma erae和Meliniomyces variabilis定殖蓝莓植株抗旱性增强的过程。