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Comparative physiological and biochemial effects of CuO NPs and bulk CuO phytotoxicity onto the maize (Zea mays) seedlings View Crossref metadata(active tab) <div id="edit-xml" class="form-item form-type-item"> <?xml version="1.0"?> <doi_batch version="4.4.1" xmlns="http://www.crossref.org/schema/4.4.1" xmlns:jats="http://www.ncbi.nlm.nih.gov/JATS1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.crossref.org/schema/4.4.1 http://www.crossref.org/schemas/crossref4.4.1.xsd"><head><doi_batch_id>000692</doi_batch_id><timestamp>1713853641</timestamp><depositor><depositor_name>University of the Aegean</depositor_name><email_address>uoa@university.com</email_address></depositor><registrant>Global NEST Journal</registrant></head><body><journal><journal_metadata><full_title>Global NEST Journal</full_title><full_title>Global NEST: the international Journal</full_title><issn media_type="print">1790-7632</issn><issn media_type="electronic">2241-777X</issn></journal_metadata><journal_issue><titles><title>Issue 3</title></titles><publication_date><month>10</month><year>2024</year></publication_date><journal_volume><volume>21</volume></journal_volume><issue>3</issue></journal_issue><journal_article><titles><title>Comparative physiological and biochemial effects of CuO NPs and bulk CuO phytotoxicity onto the maize (Zea mays) seedlings </title></titles><abstract xmlns="http://www.ncbi.nlm.nih.gov/JATS1"><p><p><img alt="" src="file:///C:/Users/klont/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png" /> Plant nanotoxicology is an emerging and less-explored area of research for the plant stress biologists. The present study assesses the toxicity of bulk-CuO and nano-CuO (size <50 nm and surface area = 29 m<sup>2</sup> g<sup>-1</sup>) on maize (<em>Zea mays</em> cv. hybrids triple white Hi Tech.) seedlings. Five successive levels of stress (25, 50, 100, 150 and 200 mg L<sup>-1</sup>) suspensions of CuO and CuONP were imposed and seedling growth performance was studied along control at 8 days of experiment. Modulation of enzymatic antioxidants (SOD, CAT, APX and POD) and non-enzymatic antioxidants (total phenolics and total flavonoids) activities under both-CuO stresses were investigated in detail to get an overview of their-stress response of maize. Seed germination was completely stopped under 150 and 200 mg L<sup>-1</sup>CuONP. Generally, CuONP stress was most violent and 100 mg L<sup>-1</sup>CuONP showed the same or more drastic effect in 150 and 200 Cu bulk. Photosynthetic pigments, shoot and root lengths reduced under both stresses by about 50% of control. Soluble proteins and total antioxidants increased gradually till it reached about 200% of control at 150 mg L<sup>-1</sup>CuO and about 200-300% at 100 mg L<sup>-1</sup>CuONP. In addition, increased reducing power activity coupled with both stresses which reached to 400% of control at 150 mg L<sup>-1</sup>CuO and 100 mg L<sup>-1</sup>CuONP. Moreover, superoxide dismutase increased by 800% of control at 100 mg. L<sup>-1</sup>CuONP.</p> </p></abstract><publication_date><month>11</month><day>21</day><year>2018</year></publication_date><pages><first_page>276</first_page><last_page>289</last_page></pages><publisher_item><identifier id_type="pii">gnest_02768</identifier></publisher_item><doi_data><doi>10.30955/gnj.002768</doi><timestamp>1713853641</timestamp><resource>https://journal.gnest.org/publication/gnest_02768</resource></doi_data></journal_article></journal></body></doi_batch> </div>
