Exogenous Selenium-Instigated Physiochemical Transformations Impart Terminal Heat Tolerance in Bt Cotton

  • Muhammad Farrukh Saleem
  • Muhammad Asif Kamal
  • Muhammad ShahidEmail author
  • Amna Saleem
  • Amir Shakeel
  • Shakeel Ahmad Anjum
Original Paper


High temperature during reproductive stages of cotton is a major constraint to achieve potential yield of cotton. The aim of the present study was to determine comparative thermo-sensitivity of squaring and flowering, to optimize exogenous selenium for heat-stressed cotton, and to explore correlation among physiochemical and morphological attributes. The experiment was conducted during 2013 and repeated during 2014. The experiment was laid out in randomized complete block design under split plot arrangement and replicated thrice. Treatments were comprised of heat stress (H0 = no heat imposition; H1 = heat imposition at squaring; and H2 = heat imposition at flowering) in main plot and varying foliar selenium concentrations (Se0 = water spray/control; Se50 = 50; Se100 = 100; and Se150 = 150 mg L-1 selenium) in split plot. Significantly, more antioxidants, chlorophyll contents, water relation attributes, seed cotton yield, and lesser hydrogen peroxide were recorded with 150 mg L-1 foliar selenium compared with other concentrations under H0. While under H1 and H2, statistically similar and significantly more antioxidants, chlorophyll contents, water relation attributes, seed cotton yield, and lesser hydrogen peroxide were observed for 100 and 150 mg L-1 selenium compared with other selenium concentrations. Conclusively, H2 proved more thermolabile compared with H1, and application of 150 mg L-1 foliar selenium effectively alleviated adverse effects of heat. Moreover, we observed strong and significant associations of all physiochemical attributes with seed cotton yield.


Antioxidants Climate| Correlation Oxidative stress Phenology Thermo-sensitivity 



Superoxide dismutase






Hydrogen peroxide


Total chlorophyll contents


Relative water contents


Osmotic potential


Seed cotton yield



We genially applaud the services provided by Analytical Laboratory, Department of Agronomy, and Plant Medicinal Biochemistry Laboratory, Department of Biochemistry, University of Agriculture Faisalabad, Pakistan to conduct this research work. Moreover, all authors have read and approved the research article.

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

Supplementary material

42729_2019_139_MOESM1_ESM.docx (15 kb)
ESM 1 (DOCX 15 kb)


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Copyright information

© Sociedad Chilena de la Ciencia del Suelo 2019

Authors and Affiliations

  1. 1.Department of AgronomyUniversity of AgricultureFaisalabadPakistan
  2. 2.Agronomic Research StationBahawalpurPakistan
  3. 3.Pesticide Quality Control LaboratoryBahawalpurPakistan
  4. 4.Department of Plant Breeding and GeneticsUniversity of AgricultureFaisalabadPakistan

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