Vol. 7, Issue 3 (2019)
To study the response of salicylic acid on growth, physiological traits, yield and yield components of wheat varieties on timely and late sown conditions
Author(s): Prashansha Singh, Vinaya Kumar Yadav, AH Khan and Ram Kalap Yadav
Abstract: The present investigation entitled “Effect of salicylic acid on growth, physio-chemical changes and yield of wheat (Triticum aestivum L.) under high temperature at anthesis†was conducted at Students Instructional Farm of the Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad (U.P.) during rabi seasons of 2014-15 and 2015-16. The experiment was planned under RBD (Randomized Block Design) with three replications. The treatment consisted of two date of sowing viz;25th November and 25th December with two varieties NW-5054 and NW-2036 with ten salicylic acid treatment. Results indicated that growth attributes such as plant height, number of tillers per plant and dry weight per plant influenced with the date of sowing. When late sown variety was planted timely all the growth attributes showed drastic reduction with respect to late sowing (25th December).However, NW-5054 showed comparatively good performance in terms of growth attributes at timely sown (25th November). Performance of NW-5054 was very good as compared to NW-2036 due to delayed sowing on 25th December. Among SA treatments,T10(Seed soaking in (0.75mM) salicylic acid + Foliar spray of (0.75mM) salicylic acid at 30 DAS) resulted in highest increase in these traits while T9 (Foliar spray of (0.75mM) salicylic acid at 30 DAS)over control. Proline content in leaves increased with the age of the crop up to 90 DAS in both the date of sowing. The highest amount of proline content was recorded at 90 DAS in both the varieties under both the date of sowing. Date of sowing influenced the membrane injury index (MII). Both the varieties had higher MII at 60 DAS. SA treatment significantly decreased the MII at all the growth stages. The activity of antioxidant enzymes viz; catalase, superoxide dismutase and peroxide in leaves increased with the age of the crop up to 90 DAS under both the date of sowing in both the varieties.SA treatments increased the activities of catalase, superoxide dismutase and peroxide enzyme. However, maximum increase in the activity of these enzymes was observed with T10 (Seed soaking in (0.75mM) salicylic acid + Foliar spray of (0.75mM) salicylic acid at 30 DAS). Time of sowing decreased substantially almost in all the yield components measured viz; number of ear per plant, ear length, number of grains per plant, test weight, biological yield and harvest index which caused severe reduction in yield. Overall, T10 (Seed soaking in (0.75mM) salicylic acid + Foliar spray of (0.75mM) salicylic acid at 30 DAS) treatment showed best result and T2 Seed soaking in (0.25mM) salicylic acid gave least. All the salicylic acid treatments reduced the detrimental effect of heat stress on both the varieties by improving physiological traits which ultimately helped in obtaining higher yield.
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How to cite this article:
Prashansha Singh, Vinaya Kumar Yadav, AH Khan, Ram Kalap Yadav. To study the response of salicylic acid on growth, physiological traits, yield and yield components of wheat varieties on timely and late sown conditions. Int J Chem Stud 2019;7(3):981-986.
