Drought Stress Mitigation in Wheat (Triticum aestivum L.) through Physiological Enhancements
Drought Stress Mitigation in Wheat (Triticum aestivum L.) through Physiological Enhancements
Safdar Hussain1, Muhammad Naeem Mushtaq5, Ali Bakhsh3, Muhammad Mudassar Maqbool1, Muhammad Sarwar1, Muhammad Jan4*, Muhammad Abdul Qayyum2 and Arif Husain2
ABSTRACT
Drought stress is a major production constraint in wheat. There are promising mechanisms by which wheat can tolerate drought stress that can be measured in terms of foliar application of plant growth regulators and plant extracts. Wheat genotypes (Triple dwarf-1, Aas-2011; Faisalabad- 2008) were exposed to critical drought stage. The plants were exposed to normal irrigation, application of bio stimulants like 2µM ABA, 10 mM SA, 15% MLE and 10% MBLE were applied at grain filling stage but skipping irrigation. Maximum growth related parameters were observed by applying full irrigation. Comparing the bio stimulants application, the application of ABA significantly increased the plants population (95.55 m-2), plant height, tillers (88.77 m-2), spike (287.17), spikelets per spike (18.56), grains per spike (55.21), spike length (12.38 cm) and thousand grain weight (40.95). Similar trend was also observed in case of grain yield (5708.51 kg ha-1), biological yield (16380.9 kg ha-1), harvest index (34.85 %), water use efficiency (4.78 kg ha-1 mm-1), drought yield index (92.21%), protein contents (17.37 mg g-1), leaf water contents (72.65 %), soil moisture contents (14.40 %). Comparing the genotypic performance Aas-2011 performed well as compared to Faisalabd-2008 and TD-1 wheat genotype.
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