PJB-2017-569
FOLIAR APPLIED SALICYLIC ACID (SA) IMPROVING DROUGHT AND SALT TOLERANCE IN WHEAT (Triticum aestivum L.)
Zahoor Ahmad
Abstract
Salt and water stress are important threats world-wide which adversely affect growth and development of crop plants. A study was conducted to check the response of foliar applied salicylic acid (SA) on the growth, chlorophyll contents and gas exchange attributes of wheat under water and salt stress conditions. The experiment was conducted in a wire house with three wheat cultivars (Glaxy-2013, Punjab-2011 and Millat-2011) and two levels of foliar applied SA (Control, SA@ 100 mg/L) under factorial CRD with three replications. All the growth, chlorophyll contents and gas exchange parameters were significantly (P ? 0.01) improved by foliar applied SA at tillering stage of wheat under salt and water stress in Glaxy-2013. The highest values of chlorophyll a (2.31 mg g-1), chlorophyll b (3.24 mg g-1) and total chlorophyll contents (5.55 mg g-1) were recorded in Glaxy-2013 by using foliar application of SA @ 100 mg/L at tillering stage. Similarly the leaf photosynthetic rate (5.33� mol m-2 s-1), transpiration rate (3.47 mmol H2O m-2 s-1) and stomatal conductance (0.85 mmol H2O m-2 s-1) were also recorded in the same treatment in Glaxy-2013. Thus, Glaxy-2013 could be suggested as more resistant to drought and salt stress.
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