Background: The application of trace elements is important to improve plant growth under oxidative stress conditions, as foliar spraying improves plant physiology, growth and production. Aims to adding zinc to treat the harmful effect of the root Hydrogen peroxide for okra and study of the interaction between zinc and the amino acid selenocysteine in improving the plant&rsquo;s ability to face hydrogen peroxide stress. 
 
Methods: A field experiment was conducted during the spring season of 2024 at the College of Agriculture-University of Diyala. A randomized complete block design (RCBD) was used with three replicates. The experimental treatments included three levels of spraying hydrogen peroxide acid (0,3,6) mg L-1&nbsp;symbolized by (H0,H3,H6) and two levels of spraying zinc element (100,0) mg Zn.L-1&nbsp;symbolized by (Zn0,Zn100) and three levels of spraying amino acid selenocysteine (50,25,0) mg L-1&nbsp;symbolized by (Se0,Se25, Se50). Okra plant, Iraqi Batira variety, was planted. 
 
Result: The third treatment of spraying hydrogen peroxide led to a significant reduction in most of the studied traits. Reducing the negative effects of hydrogen peroxide on the plant by using the second level of zinc spray Zn100, as the plant height, total chlorophyll content in the leaves, number of fruits and total plant yield increased by an average of 100.56 cm, 37.90 SPAD, 9.03 fruits per plant and 94.33 Mg.h-1. Reducing the negative effects of spraying hydrogen peroxide by spraying the amino acid selenocysteine at a level of 50 mg.L-1 for most of the experimental traits. The leaf proline content was not affected by the levels of zinc and selenocysteine used, while the proline concentration increased with spraying high levels of hydrogen peroxide.

Reducing the Negative Effects of Hydrogen Peroxide by Spraying Zinc and Selenocysteine on Okra

<div>Background: Selenium is an important trace mineral required by the animals. It is an integral part of antioxidant system, protecting the body against free radical injury. Nano particles attract a widespread attention due to its high bioavailability and efficacy. The current study was aimed to synthesize, characterize nano selenium and evaluate the cytotoxic effect of nano selenium and organic selenium (selenocysteine) under in vitro condition in vero cell line.&nbsp; 
 
Methods: Nano selenium was synthesized by wet chemical method by using sodium selenite, selenium powder, ascorbic acid and sodium hydroxide at laboratory level. In this study particle size, shape, zeta potential and selenium content were characterized by using Particle Size Analyser (PSA), Transmission Electron Microscope (TEM) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The toxicity was analysed by MTT assay against vero cell line. 
 
Result: The result revealed that selenium nano particles were spherical in shape, nano in size (less than 50 nm) and pure in nature. The nano selenium and organic selenium (selenocysteine) effectively inhibited the growth of vero cells in a dose dependent manner.</div>

Reducing the Negative Effects of Hydrogen Peroxide by Spraying Zinc and Selenocysteine on Okra

​Synthesis, Characterization and Safety Assessment of Nano Selenium and Organic Selenium for Incorporation in Lamb Feed

Synthesis, Characterization and Safety Assessment of Nano Selenium and Organic Selenium for Incorporation in Lamb Feed