Journal:Cadmium bioconcentration and translocation potential in day-neutral and photoperiod-sensitive hemp grown hydroponically for the medicinal market
| Full article title | Cadmium bioconcentration and translocation potential in day-neutral and photoperiod-sensitive hemp grown hydroponically for the medicinal market |
|---|---|
| Journal | Water |
| Author(s) | Marebesi, Amando O.; Lessl, Jason T.; Coolong, Timothy W. |
| Author affiliation(s) | University of Georgia |
| Primary contact | Email: aom at uga dot edu |
| Year published | 2023 |
| Volume and issue | 15(12) |
| Article # | 2176 |
| DOI | 10.3390/w15122176 |
| ISSN | 2073-4441 |
| Distribution license | Creative Commons Attribution 4.0 International |
| Website | https://www.mdpi.com/2073-4441/15/12/2176 |
| Download | https://www.mdpi.com/2073-4441/15/12/2176/pdf?version=1686282553 (PDF) |
 |
This article should be considered a work in progress and incomplete. Consider this article incomplete until this notice is removed. |
Abstract
Heavy metal contamination of agricultural soils is potentially concerning when growing crops for human consumption. Industrial hemp (Cannabis sativa L.) has been reported to tolerate the presence of heavy metals such as cadmium (Cd) in the soil. Therefore, the objectives of this study were to evaluate Cd uptake and translocation in two day-length-sensitive (DLS) and two day-neutral (DN) hemp varieties grown for the medicinal market and to determine the impact of Cd exposure on cannabinoid concentrations in flowers. A hydroponic experiment was conducted by exposing plants to 0 mg·L−1 Cd and 2.5 mg·L−1 Cd in the nutrient solution. Cadmium concentrations ranged from 16.1 to 2274.2 mg·kg−1 in roots, though all four varieties accumulated significant concentrations of Cd in aboveground tissues, with translocation factors ranging from 6.5 to 193. Whole-plant bioconcentration factors ranged from 20 to 1051 mg·kg−1. Cannabinoid concentrations were negatively impacted by Cd exposure in DN varieties but were unaffected in DLS varieties. Biomass was reduced by Cd exposure demonstrating that these varieties might not be suitable for growth on contaminated soil or for phytoremediation. There is potential for Cd accumulation in flowers, showing the need for heavy metal testing of C. sativa consumer products.
Keywords: auto-flower, bioconcentration factor, cannabinoid, heavy metal, hemp, metal stress, translocation factor
Introduction
References
Notes
This presentation is faithful to the original, with only a few minor changes to presentation. Some grammar and punctuation was cleaned up to improve readability. In some cases important information was missing from the references, and that information was added.
