Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity
El-Shazoly, R. (2019). Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity. EKB Journal Management System, 59(2), 357-374. doi: 10.21608/ejbo.2019.5996.1243
Rasha El-Shazoly. "Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity". EKB Journal Management System, 59, 2, 2019, 357-374. doi: 10.21608/ejbo.2019.5996.1243
El-Shazoly, R. (2019). 'Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity', EKB Journal Management System, 59(2), pp. 357-374. doi: 10.21608/ejbo.2019.5996.1243
El-Shazoly, R. Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity. EKB Journal Management System, 2019; 59(2): 357-374. doi: 10.21608/ejbo.2019.5996.1243

Evaluation of the Effectiveness of Safflower ( Carthamus tinctorius ) Seeds Amendment with Silicon or Humic Acid During Germination under CuO (NPs) Phytotoxicity

Egyptian Journal of Botany
Article 6, Volume 59, Issue 2, August 2019, Page 357-374  XML PDF (1.06 MB)
Document Type: Regular issue (Original Article)
DOI: 10.21608/ejbo.2019.5996.1243
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Author
Rasha El-Shazoly email
Botany and Microbiology Department, Faculty of Science, New Valley University, Al-Kharja, New Valley, Egypt
Abstract
AMELIORATION with silicon (1mM sodium silicate Na2SiO3) or humic acid (50mg L-1 HA) was tested in counteracting the phytotoxicity of copper oxide nanoparticles (CuONPs) at 50, 100 and 150mg L-1 on Safflower plants (Carthamus tinctorius). Si sustained seed growth at (150mg L-1 CuO NPs). The application of HA increased copper concentration in seedling by about 5 to 10 fold, relative to the control at 50 and 100mg L-1. Fresh weight of safflower seedlings were reduced significantly at 100mg L-1 CuO NPs. Si enhanced fresh and dry matter gain under 100 and 150mg L-1 CuO NPs, also HA improved dry matter at 100mg L-1 CuO NPs. Chlorophyll a and carotenoid contents reduced by about 60% and 50% at CuO NPs (100mg L-1), respectively as compared to control. Chlorophyll a and carotenoid contents reduced by about 60% and 50% at CuO NPs (100mg L-1), respectively as compared to control. Si or HA sustained Chl.a content unchanged and improved carotenoids contents at 100mg L-1 CuO NPs.
Phenolics contents significantly increased under CuO NPs phytotoxicity. External application of HA provoked more phenolics content. Nano-CuO phytotoxicity reduced H2O2 scavenging and lipid peroxidation inhibition %. Si or HA enhanced significantly lipid peroxidation inhibition % and H2O2 radial scavenging %. Si or HA reflected significant enhancement of SOD and CAT enzymes under elevating concentrations of CuO NPs. Si enhanced significantly POD activity at (50, 100 and 150mg L-1) CuO NPs levels.
Keywords
antioxidants; Carthamus tinctorius ; CuO; Humic acid; Nanoparticles; Phenolics; silicon
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