Influence of salt stress on water uptake, pigments system, ion-homeostasis in crop plants

Abstract Increased salinization of arable land is expected to have devastating global effects, resulting in 30% land loss within the next 25 years and up to 50% by the middle of twenty-first century. High soil salinity causes both hyperionic and hyperosmotic stress and can lead to plant demise. Salinity in a given land area depends upon various factors like amount of evaporation (leading to increase in salt concentration), or the amount of precipitation (leading to decrease in salt concentration). Changes of pigment system contents under salt stress are used as parameter for selection of tolerant and sensitive cultivars in crop plants. Chlorophyll a, chlorophyll b, chlorophyll a/b and carotenoid contents showed increase and decrease depending on exposure time of NaCl exposure in many plants. When K substitute by Na in biochemical reactions then Ion cytotoxicity is happening and when Na and Cl ions interfere with non covalent interactions between their amino acid, then proteins don’t function, thus in salinity condition poisonous levels of sodium and also inadequate amount of K for enzymatic reactions and osmotic adjustment is happened.

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Updated: April 28, 2018 — 1:51 am