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Determination of Selenium dose assessment and optimization for heat- tolerance in cucumber (Cucumis sativus L.)

Research Paper | September 1, 2020

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Rozina Kazmi, Zahoor Hussain

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Int. J. Biosci.17( 3), 191-200, September 2020

DOI: http://dx.doi.org/10.12692/ijb/17.3.191-200


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The current study was conducted to identify the best level of selenium (Se) for inducing thermo-tolerance capacity in genotypes of cucumber. The study was performed in a growth chamber. Seeds of one heat-sensitive (Desi Cucumber) and one heat-tolerant cucumber genotype (Safoora F1-Hybrid) were sown in plastic pots. The heat-stress (40/30 °C) was applied after leaf emergence. Different levels of selenium as a foliar spray (0, 0.2, 0.7 and 0.8 ppm) were applied 15-day after stress induction. The treatment of selenium (0.7 ppm) significantly more effect on the shoot length and the highest shoot length (95.87 cm) was observed in Safoora FI- Hybrid followed by Dasi Cucumber (36.41 cm). Similarly, maximum root length (58.57 cm) was recorded in Safoora F1 Hybrid while the lowest root length (40.17 cm) was noted in control. Similarly, findings were observed in Desi Cucumber at the same level of selenium at 0.7 ppm. The best leaf area was also observed in Safoora F1-Hybrid (57.82 cm2), while the minimum leaf area was recorded in the control 36.56 cm2. Overall results showed that selenium @0.7 ppm was the best appropriate level of selenium to increase the thermo-tolerance perspective in the best genotypes of cucumber.


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Determination of Selenium dose assessment and optimization for heat- tolerance in cucumber (Cucumis sativus L.)

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