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- Title
Initial screening studies on potential of high phenolic-linked plant clonal systems for nitrate removal in cold latitudes.
- Authors
Derong Lin; Lijiang Hu; Hong You; Dipayan Sarkar; Baoshan Xing; Kalidas Shetty
- Abstract
Nitrate removal is a major challenge in drinking water systems and is more acute in colder latitudes due to low metabolic conversion rates of biological systems. To achieve rapid nitrate removal, designed plant systems in greenhouse microenvironments has potential. In such localized controlled microenvironments, higher temperatures can be managed for plant growth in an appropriate growth medium through which nitrate-contaminated water is fed for denitrification. In the overall strategy to develop effective plant systems for controlled environment removal of nitrate pollution, we have developed plant tissue culture technologies to isolate cold tolerant plant species that can be grown in microenvironments. The use of novel tissue culture technologies allowed isolation of plant clonal lines of single seed phenotype origin that can be screened for cold tolerance and nitrate removal in aquatic systems. Such clonal lines were evaluated for nitrate tolerance in the range of 0–50 mM. Further, selected clonal lines were evaluated for nitrate reductase-linked phenolic-linked antioxidant and pentose phosphate pathways stimulation by measuring specific enzyme activity in the range of 0–10 mM. Such single seed plant clonal isolations were evaluated for nitrate removal in the range of 0–10 mM in laboratory systems. One group of plant species that hold promise for use in controlled greenhouse environments are species of the family Lamiaceae such as mints and oregano. Strategy for specific clonal screening and use in cold latitude plant-based and greenhouse systems for temperature control in the winter have been proposed. These enhanced nitrate removing clonal lines can use pentose phosphate pathway stimulation to optimize nitrate removal by likely providing the needs of NADPH that are also needed for phenolic antioxidant synthesis and stimulation of associated antioxidant enzyme responses. High nitrate pollution removal clonal systems can be screened, and such clonal lines potentially use the pentose phosphate pathway and associated phenolic-linked antioxidant pathways to manage nitrate uptake through nitrate reductase. Such clonal systems have potential to be integrated into greenhouse systems to remove nitrate pollution in water and concurrently have the ability to grow value-added plants for diverse applications such as food herbs and medicinal use.
- Subjects
DRINKING water purification; NITRATES; TOXICOLOGY of water pollution; WATER pollution prevention; NITROGEN &; the environment
- Publication
Journal of Soils & Sediments: Protection, Risk Assessment, & Remediation, 2010, Vol 10, Issue 5, p923
- ISSN
1439-0108
- Publication type
Article
- DOI
10.1007/s11368-010-0214-6