Exploring the better genetic options from indigenous material to cultivate tomato under high temperature regime

  • Araiz Nazir Institute of Horticultural Sciences, University of Agriculture, Faisalabad
  • Muhammad Rashid Shaheen Department of Horticultural Sciences, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur
  • Choudhary M Ayyub Institute of Horticultural Sciences, University of Agriculture, Faisalabad
  • Rashid Hussain Department of Horticultural Sciences, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur
  • Nadeem Sarwer Nuclear Institute of Agriculture and Biology, Faisalabad
  • Muhammad Imran Department of Soil Sciences, Bahauddin Zakariya University, Multan
  • Muhammad Aurangzaib Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur
  • Muhammad Nawaz Department of Environmental Sciences, BZU, Multan,
  • Muhammad Faizan Ali Khan
  • Yussra Yawad Departments of Environmental Sciences, Bahauddin Zakariya University, Multan
  • Munawar Iqbal Departments of Environmental Sciences, Bahauddin Zakariya University, Multan
Keywords: Tomato, Genotypes, Screening, Heat stress

Abstract

Screening test was conducted on 54genotypes of tomato to analyze the effect of heat stress and categorize them as heat tolerant or heat susceptible ones. Seedlings were grown at temperatures of 28/22oC day/night. Four weeks after sowing, plants were exposed to high temperatures of 40/32oC day/night for one week. Data for various morphological (root and shoot length, root and shoot fresh and dry weight, number of leaves) and physiological parameters (chlorophyll contents, sub-stomatal CO2, transpiration rate, stomatal conductance, photosynthetic rate, water use efficiency and leaf temperature) were recorded. Heat stress had a negative effect on all physiological and morphological processes of the genotypes. However, “Parter Improved”, “Legend” and “Roma” were the most tolerant genotypes whereas “Grus Chovka”, “Nepoli”, “Tima France”, “Kaldera” and “Cold Set” were susceptible to heat stress.

Published
2017-12-01