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Induction of Heat Tolerance in Maize through Exogenous Application of Salicylic Acid, Ascorbic Acid and Hydrogen Peroxide in a Field Study

Induction of Heat Tolerance in Maize through Exogenous Application of Salicylic Acid, Ascorbic Acid and Hydrogen Peroxide in a Field Study

Muhammad Mazhar Iqbal1*, Ijaz Ahmad2, Shahzad Maqsood Ahmed Basra3, Abu Baker Ijaz4, Zahid Hassan Tarar5, Muhammad Ansar6, Umer Iqbal7, Tayyaba Naz4, Bilquees Fatima8, Muhammad Akram9, Allah Wasaya10, Asif Iqbal11, Shakeel Ahmed Anwar12, Khalid Saif Ullah Khan13, Azeem Khalid14, Asif Aziz15 and Rashid Mehmood16 

1Soil and Water Testing Laboratory, Ayub Agricultural Research Institute, Chiniot, Punjab, Pakistan; 2Soil Conservation Group of Agriculture Department, Ratti, Gujrat, Punjab, Pakistan; 3Department of Agronomy, University of Agriculture, Faisalabad, Pakistan; 4Institute of Soil and Environmental Sciences University of Agriculture, Faisalabad, Pakistan; 5Soil and Water Testing Laboratory, Ayub Agricultural Research Institute, Mandi Bahauddin, Punjab, Pakistan; 6Department of Agronomy, PMAS Arid Agriculture University Rawalpindi, Pakistan; 7Crop Diseases Research Institute, National Agricultural Research Centre, Islamabad, Pakistan; 8Institute of Horticultural Sciences, University of Agriculture Faisalabad, Pakistan; 9Department of Environmental Sciences, COMSATS, Institute of Information Technology, Vehari, Pakistan; 10Department of Agronomy, Bahauddin Zakarya University Sub-Campus Layyah, Pakistan; 11On Farm Water Management, 21-Davis Road Lahore, Pakistan; 12Pulses Research Institute, Faisalabad, Pakistan; 13Department of Soil Science and Soil and Water Conservation, PMAS Arid Agriculture University Rawalpindi, Pakistan; 14Department of Environmental Sciences, PMAS Arid Agriculture University Rawalpindi, Pakistan; 15Department of Entomology, PMAS Arid Agriculture University Rawalpindi. Arid Agriculture University, Rawalpindi, Pakistan; 16Department of Plant Breeding and Genetics, PMAS Arid Agriculture University Rawalpindi, Pakistan.

mazhar1621@gmail.com  

ABSTRACT

Temperature is a very important factor that affects crop yield. Maize, a monoecious plant, is adversely affected by high temperature during anthesis. Asynchronous fertilization and pollen desiccation reduce maize yield by reducing grain number and their size. Spray of hydrogen peroxide (H2O2), salicylic acid (SA) and ascorbic acid (AsA) may induce heat stress tolerance. Spray of SA, AsA, and H2O2 increased chlorophyll, relative water and nutrient contents, membrane stability index (MSI) and antioxidants activities in heat stress. Moreover, foliar application of chemicals during normal and late planting improved the grain yield by increasing both the grain number and size. Foliar spray of SA, AsA and H2O2 may induce heat tolerance by improving antioxidant activities which stabilized membrane and maintaining relative water, chlorophyll and nutrient content in ear leaves of maize during heat stress. 

 

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Pakistan Journal of Zoology

October

Vol. 52, Iss. 5, Pages 1631-2026

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