ABA SENSITIVITY AS A CRITERION FOR DROUGHT TOLERANCE IN WHEAT (TRITICUM AESTIVUM L.) CULTIVARS
Abdul Razzaq
shahzahid578@hotmail.comCrop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Madiha Rashid
Crop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Talal Ahmad Shfique
Crop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Abdul Hafeez
Crop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Hafiz Muhammad Jhanzab
Crop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Ghulam Shabir
Department of Plant Breeding and Genetics, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 (Pakistan)
Zahid Hussain Shah
Department of Arid Land Agriculture, King Abdul Aziz University Jeddah, Saudi Arabia. PC –21577 (Saudi Arabia)
Abstract
Criteria used for evaluating drought tolerance of wheat cultivars demanding more time and efforts are usually not efficient and conclusive. Present study was conducted to evaluate ABA sensitivity as a criterion for evaluating drought tolerance of wheat cultivars at an early stage. Ten cultivars of wheat were subjected to drought at 3-leaf stage to select the most sensitive and two tolerant cultivars using mortality rate. Tatara was found the most susceptible whereas GA-2002 and Chakwal-50 were the cultivars with maximum drought tolerance. These cultivars were used to study sensitivity to applied absicic acid (based on germination index and relative growth inhibition rate) and physiological responses (leaf water content, chlorophyll stability index, coefficient of relative inhibition and proline accumulation) under drought stress. Highest ABAsensitivity was recorded in GA-2002 and Chakwal-50 whereas Tatara manifested minimum sensitivity. ABAsensitivity corresponded to physiological indices of drought tolerance. Results show that ABA-sensitivity is an efficient criterion that can be used to evaluate drought tolerance of wheat cultivars at early stage.
Keywords:
ABA, chlorophyll, inhibition, prolineReferences
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Authors
Abdul Razzaqshahzahid578@hotmail.com
Crop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Madiha RashidCrop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Talal Ahmad ShfiqueCrop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Abdul HafeezCrop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Hafiz Muhammad JhanzabCrop Physiology Lab, Department of Agronomy, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Ghulam ShabirDepartment of Plant Breeding and Genetics, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan. PC – 46300 Pakistan
Authors
Zahid Hussain ShahDepartment of Arid Land Agriculture, King Abdul Aziz University Jeddah, Saudi Arabia. PC –21577 Saudi Arabia
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