PJB-2019-825
EFFECT OF ENDOGENOUS AND EXOGENOUS SILICON SOURCES ON WHEAT VARIETIES OF BALOCHISTAN GROWN UNDER SALT STRESS
DURDANA SHAKEEL
Abstract
Wheat (Triticum aestivum L.) is a crop which consists of multiple grains that are rich in vitamins, fibers and protein. Its production is normally effected by all physical parameters like salt stress, drought and high temperature. Silicon can mitigate the adverse effect of salt stress in wheat. Therefore, in this study four wheat varieties of Balochistan were grown in different silicon treatments, under salt stress. This this study was basically designed to compare the positive effect of different silicon sources as water soluble sources (endogenous) and their foliar application (exogenous) to mitigate the salt stress on wheat in hydroponic culture systems. It was evaluated that the endogenous silicon sources gave higher values of length, fresh, dry weight of root and shoot as well as chlorophyll content as compared to exogenous (foliar) silicon application to wheat plants grown in hydroponics under salt stress. As more silicon is absorbed by the roots instead of leaves and is frequently available to the plant so it can alleviate the salt stress in all the parts of plant at cellular level. All the growth parameters were compared with each other and with the control. Significant difference were found in all the treatments and P < 0.05, whereas among varieties P > 0.05 so non-significant differences existed among varieties. Among the two silicon sources sodium silicate gave better results when compared to silica gel. The efficiency of the four wheat varieties was found in this order Zardana > Zarlashta > Pir-Sabaq > Sariab.
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