Abstract
The amount of soil contaminated with heavy metal increases due to urbanization, industrialization, and anthropogenic activities. Quinoa is considered a useful candidate in the remediation of such soil. In this pot experiment, the phytoextraction capacity of quinoa lines (A1, A2, A7, and A9) against different nickel (Ni) concentrations (0, 50, and 100 mg kg-1) were investigated. Required Ni concentrations were developed in polythene bags filled with sandy loam soil using nickel nitrate salt prior to two months of sowing and kept sealed up to sowing. Results showed that translocation of Ni increased from roots to shoots with an increase in soil Ni concentration in all lines. A2 line accumulated high Ni in leaf compared to the root as depicted by translocation factor 3.09 and 3.21 when grown at soil having 50 and 100 Ni mg kg-1, respectively. While, in the case of root, A7 accumulated high Ni followed by A9, A1, and A2, respectively. There was a 5–7% increased seed yield by 50 mg kg-1 Ni in all except A1 compared to control. However, growth and yield declined with a further increase in Ni level. The maximum reduction in yield was noticed in A9, which was strongly linked with poor physiological performance, e.g., chlorophyll a, b, and phenolic contents. Ni concentrations in the seed of all lines were within the permissible value set (67 ppm) by FAO/WHO. The result of the present study suggests that quinoa is a better accumulator of Ni. This species can provide the scope of decontamination of heavy metal polluted soil. The screened line can be used for future quinoa breeding programs for bioremediation and phytoextraction purpose.
Highlights
Worldwide, dealing with heavy metals toxicity is a major challenge for agricultural scientists because they are in soil environment have become a leading health concern, especially for plants, humans, and animals [1,2,3]
Under maximum Ni application (100 mg kg-1), A1 and A2, unlike other lines, showed a maximum increment in shoot length (2.4 and 1.6%), respectively (Fig 1A). While both these lines showed an increase in root length (6.45 and 2.43%) at a lower Ni dose (50 mg kg-1) as compared to control (Fig 1B)
A7 and A9 exhibited no significant increase between control and 100 mg kg-1 Ni treatment but A1 and A2 lines displayed (2.76 and 11.13%) at 50 mg kg-1 and (0.85 and 7.54%) increment at 100 mg kg-1 Ni application, respectively (Fig 1D)
Summary
Worldwide, dealing with heavy metals toxicity is a major challenge for agricultural scientists because they are in soil environment have become a leading health concern, especially for plants, humans, and animals [1,2,3]. Nickel (Ni) contamination is one of the leading heavy metals that comes from the discharge of effluents from industries, i.e., Ni steel and iron alloys [4], cadmium batteries [5], electroplating [6], and by the application of pesticide and municipal wastes [7]. Besides these facts, excessive Ni in the land has become a devastating threat to crops’ growth, development, and productivity [8]. The initiation of oxidative damage annoys the balance between antioxidants and reactive oxygen species (ROS) [11], damaging the nucleic acids, proteins, and organelles’ membranes [12]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
