Abstract Detail

Physiology

Fleurial, Killian [1], Zwiazek, Janusz [2].

Got Aquaporins? Understanding responses and tolerance mechanisms of plants exposed to phytotoxic tailings water and hypoxia.

Oil sands mining produces large volumes of tailings, which must be reclaimed. These tailings continually release water which over time may get into the root zone and which contain commonly elevated levels of potentially injurious compounds. Flooding/hypoxic conditions aggravate these effects. Using hydroponic solutions in a controlled growth chamber we examined the hypothesis that hypoxic conditions aggravate the effects of non-segregating tailings less severely in the plant species that are more tolerant of root hypoxia. The experiment was run using three relatively resistant reclamation tree species to root hypoxia [tamarack (Larix laricina), black spruce (Picea mariana), and balsam poplar (Populus balsamifera)] and three relatively sensitive reclamation tree species to root hypoxia [jack pine (Pinus banksiana), lodgepole pine (Pinus contorta), and aspen (Populus tremuloides)]. The role of PIP aquaporins and non-symbiotic hemoglobins in flood tolerance will also be investigated.

1 - University Of Alberta, Renewable Resources, 4-52 Earth Sciences Building, Edmonton, AB, T6G2E3, Canada
2 - University of Alberta, Renewable Resources, 4-47 Earth Sciences Building, Edmonton, AB, T6G2E3, Canada

Keywords:
stress physiology
land reclamation
phytotoxic
hydroponics
hypoxia.

Presentation Type: Poster
Session: P, Physiology Posters
Location: Virtual/Virtual
Date: Wednesday, July 29th, 2020
Time: 5:00 PM Time and date to be determined
Number: PPS003
Abstract ID:728
Candidate for Awards:Physiological Section Physiological Section Li-COR Prize