Shabnam*, Rashpal Singh Sarlach2 and Rohit Chhabra1
1Department of Botany, Punjab Agricultural University, Ludhiana, 141004
2Department of Plant Breeding & Genetics, Punjab Agricultural University, Ludhiana, 141004
Email: shabnam-bot@pau.edu
Received-02.04.2019, Revised-25.04.2019
Abstract: Terminal heat stress causes significant yield reduction in wheat (Triticum aestivum L.) due to rise in temperature. The present study on the performance of osmo-protectants and antioxidants on three wheat varieties was conducted at the experimental area of Department of Plant Breeding and Genetics, PAU, Ludhiana. Two foliar sprays of osmo-protectants (Salicylic acid, KNO3 and ZnSO4.7H2O) and antioxidants (Ascorbic acid and arginine) excluding water were done at anthesis stage and ten days after anthesis stage. The data revealed that concentration of salicylic acid (75 µgml-1) had non-significant effect on wheat yield. KNO3 and salicylic acid gave better yield as compared to all other treatments. Ascorbic acid and arginine proved significant in all the three varieties. It may be interpreted that osmo-protectants and antioxidants can neutralize heat stress. WH 1105 gave 7.7 percent higher yield than PBW 621 and 10.6 percent than PBW 550 in response to osmo-protectants and antioxidants application.
Keywords: Antioxidants, Osmo-protectants, Terminal Heat Stress, yield, Wheat
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