Selenium (Se) is a vital microelement that is essential for the normal functioning of humans as well as animal. Its deficiency may lead to some diseases. In higher concentrations, selenium is toxic for humans, animals as well as plants.
Soil facility along with selenium disturbs its level in food and feed via the nutrition chain. However, bioavailability as well as the reactivity of the selenium rely not only on its entire content in soil but also rely on its chemical forms.
Distribution of the diverse forms of selenium relies on soil properties like aeration, reaction, contents of clay as well as organic matter. Selenium concentration in soil is demonstrated by selenium content in soil native substrate, climate, as well as age. These factors might contribute either to the buildup of selenium during soil-forming or its elimination during soil-forming.
The soils shaped on sedimentary rocks that comprise higher amounts of organic matter classically have high toxic selenium concentrations.
The soils formed on magmatic rocks are generally poor in Se, typically possess or have low selenium content. When selenium happens in alkaline soils, it gets converted into an oxidized form such as selenate. Hence, selenium becomes water-soluble. This form of selenium is highly toxic and effortlessly percolated from the soil and accessible to plants.
Positive effects of selenium in plants
The beneficial effects of selenium can be detrimental for plants in high concentrations, though it can use advantageous effects at low concentrations. It can raise the tolerance of plants towards the UV (ultraviolet)-induced oxidative stress and simultaneously promote the growth and development of aging seedlings.
There are several beneficial effects associated with selenium in the plants. They are described as follows:
It helps in maintaining the cellular structure as well as its function.
It plays a crucial role in regulating ROS (reactive oxygen species).
It plays an important role in the process of photosynthesis.
It helps in reducing the toxicity of metal.
It displays a role in the growth as well as the development of plants.
It helps in distributing essential nutrients to the plants.
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