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- W4384283375 endingPage "348" @default.
- W4384283375 startingPage "331" @default.
- W4384283375 abstract "Selenium (Se) is a trace element requisite for plants, animals, humans, and microorganisms (some). Though it is responsible for countless beneficial effects in numerous plant species. But its essentiality for several plants is still debatable and demands in-depth understandings. Inorganic (selenite and selenate) and organic (selenocysteine and selenomethionine) Se species are primarily involved in the Se uptake mechanisms within plant species. Among all Se forms, plants cannot take up elemental Se and selenide compounds, while selenate exists predominantly. For transport mechanisms, plants utilize roots associated with high-affinity plasma membrane transporters such as phosphate/silicon influx, sulphate, and amino acid transporters for the potential transport of selenite, selenate, and organic Se species, respectively. Inside plant cells, Se can interact with sulphur assimilation pathways and convert into selenoamino acids/organic Se forms. Transgenic studies revealed that the participation of key enzymes in these pathways governed the Se assimilation and tolerance. Elevated Se levels can cause phytotoxicities mainly due to nitro-oxidative stress, misincorporation of selenoamino acids into proteins, hormonal imbalance, and impairment in carbon metabolisms. Se hyperaccumulators adapt diverse tolerance mechanisms to handle the Se toxicity (e.g. stimulation in enzymatic or non-enzymatic antioxidants or involvement of phytohormones/signalling molecules) and restrict the formation of malformed proteins via biochemical approaches such as conversion of selenoamino acids into less toxic volatile compounds, cellular sequestration, and endoplasmic reticulum associated degradation. In addition, improvement in the accumulation of non-protein selenoamino acids and breakdown of selenoamino acids into elemental Se or alanine. Non-hyperaccumulators may limit Se tolerance possibly due to their inability to distinguish among selenoamino acids that resulted in deformed proteins. In this chapter, we clarify the mechanisms involved in assimilation, metabolism, and biochemical approaches of Se species in plants." @default.
- W4384283375 created "2023-07-15" @default.
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- W4384283375 creator A5054514789 @default.
- W4384283375 creator A5080091095 @default.
- W4384283375 creator A5089833775 @default.
- W4384283375 date "2023-07-14" @default.
- W4384283375 modified "2023-09-25" @default.
- W4384283375 title "Selenium Species in Plant Life" @default.
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