A critical review of selenium biogeochemical behavior in soil-plant system with an inference to human health

The behaviour of irrigation induced Se in the groundwater-soil-plant system in Punjab, India

“…So far, it is not possible to dene a reliable threshold value above which plants develop signs of toxicity such as chlorosis, withering or stunted plant growth. 38 This might in parts be explainable by the fact that only wheat plants show clear Se concentration related signs of chlorosis while many other plants form less clear symptoms like leaf tin burning or brown spots on the leaves. 57 In our study, wheat plants without visible signs of chlorosis have Se concentrations below 50 mg kg À1 , which is at least four times less than in wheat that shows clear signs of toxicity.…”

“…35,36 Both inorganic species can be transformed by biotic and abiotic processes but typically co-exist in soils. 37,38 Under anoxic conditions, microbes are able to further reduce selenite to insoluble elemental Se or selenides. [39][40][41][42] Methylated Se species, which are oen volatile, are another product of microbial processes 43 and can be an important factor for the loss of Se from the soils directly to the atmosphere.…”

“…This is because the extent of both benecial and toxic effects of Se on plants is determined by several factors like Se concentration and speciation, plant species or agricultural practices. 38,51 Due to its signicant role with regard to human and animal health it is generally acknowledged that ensuring an adequate Se intake in both decient and seleniferous areas is highly important. So far, however, the Se status of a region is mainly determined based on total Se contents in soil.…”

Soils and Human Creation in the Holy Quran: from Point of View of Soil Science

“…This approach already has been listed among the main topics in the World Congress of Soil Science (WCSS21; Rio de Janeiro, Brazil, August 12-17, 2018), where a session C 4.2.1 (Soil and Human Health) was held. More than 7500 participants were be expected to attend during this congress (Lal et al 2017;Natasha et al 2018;Nieder et al 2018 a,b).…”

Safety Issue of Changed Nanotoxicity of Zinc Oxide Nanoparticles in the Multicomponent System

“…In this paper, we plan to expand the discussion on the physicochemical property and biological safety of ZnO NPs in multicomponent food system. Phosphoric acid system (PA, added as sourdough and yeast nutrition), tartaric acid (TA, added as sour and antioxidants), citric acid (CA, added as flavoring agent, buffer, and stabilizer), TiO 2 NPs with different particle sizes (added as colorant and food whitening agent), and glutathione (GSH, added as antioxidant and integrated detoxification) are selected as composite system components due to their extensive application in food additives . Previous efforts to understand the behavior and the risks associated with environmental nanoparticles (ENMs) have focused on only one material at a time.…”