Abstract
PurposeSalinity pose severe threat to cultivation as it drastically affects the plant sustainability and yield. The intended aim of current consensus is to assess effects of sodium silicate and salicylic acid on wheat genotypes (slat tolerant and salt sensitive) grown under salt stress.MethodsThis experiment was designed to check the effect of silicon on wheat varieties, so four different wheat genotypes named as (Umeed, Rasco, Zarghoon and Shahkaar) were grown in hydroponics under saline and normal environment. Sodium silicate and salicylic acid were applied on all varieties to determine the slat tolerance ability. Plants were harvested at maturity and different physical and chemical aspects were recorded.ResultsTo assess the salt stress on growth and yield of wheat genotypes. Wheat grown in saline conditions with sodium silicate supplementation showed improvement in all growth parameters as compared to the plants grown under salt stress without silicon supplementation. Higher contents of potassium were observed in plants grown under salt stress with silicon supplementation however, potassium concentration was found less in salicylic acid treatment and control under salt stress. Sodium concentration was found higher under salt stress but sodium silicate application reduced Na+ uptake under salt stress. Significance increase in K+ : Na+ ratio in roots enhance the translocation which in turn elevates salt tolerance ability. Among wheat varieties potassium uptake was quite higher in Umeed and Rasco as compared to Zarghoon and Shahkar.ConclusionsBased on current results it can be deduced that application of sodium silicate on different wheat varieties mitigated Na+ toxicity by elevating K+: Na+ ratio and net translocation rate in salt stressed plants.
Highlights
The earliest cultivated cereal wheat (Triticum aestivum L) is considered as staple food of Pakistan
Wheat grown in saline conditions with sodium silicate supplementation showed improvement in all growth parameters as compared to the plants grown under salt stress without silicon supplementation
Higher contents of potassium were observed in plants grown under salt stress with silicon supplementation potassium concentration was found less in salicylic acid treatment and control under salt stress
Summary
The earliest cultivated cereal wheat (Triticum aestivum L) is considered as staple food of Pakistan. In Pakistan wheat is cultivated on an area of 8.414 Mha with an annual production of 1.75 mt which is quite less than its consumption[1]. Despite of all the efforts made so far; its yield is very less due to different abiotic factors mainly salinity. Salinity is a famous drought stress worldwide in Pakistan 6.67 Mha of total agricultural land is affected by this. Salinity exerts drastic effects on plant physiology [4]. Saline soil induces osmotic imbalance making water unavailable for plants and accumulate excessive amounts of Na+ and Cl+ [5]. Excessive amount of Na+ and Cl+ ions inhibits enzyme activity [6]
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