Role of supplemental UV-B in changing the level of ozone toxicity in two cultivars of sunflower: growth, seed yield and oil quality

  • Ruchika Tripathi
  • Kshama Rai
  • Suruchi Singh
  • Madhoolika Agrawal
  • S. B. AgrawalEmail author


Ultraviolet-B radiation (UV-B) is inherent part of solar spectrum and tropospheric ozone (O3) is a potent secondary air pollutant. Therefore the present study was conducted to evaluate the responses of Helianthus annuus L. cvs DRSF 108 and Sungold (sunflower) to supplemental UV-B (sUV-B; ambient + 7.2 kJ m−2 d−1) and elevated ozone (O3; ambient + 10 ppb), given singly and in combination under field conditions using open-top chambers. The individual and interactive effects of O3 and sUV-B induced varying changes in both the cultivars of sunflower ranging from ultrastructural variations to growth, biomass, yield and oil composition. Reduction in leaf area of Sungold acted as a protective feature which minimized the perception of sUV-B as well as uptake of O3 thus led to lesser carbon loss compared to DRSF 108. Number- and weight of heads plant−1 decreased although more in Sungold with decline of oil content. Both the stresses when given singly and combination induced rancidification of oil and thus made the oil less suitable for human consumption.


sUV-B Tropospheric O3 Helianthus annuus Growth Yield Oil quality Fatty acids 



The authors are very grateful to the Head, Department of Botany, Banaras Hindu University, Co-ordinator, Centre for advanced study in Botany, FIST (DST), DST (Purse), UPE (UGC) and CSIR, New Delhi for financial support and laboratory facilities.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Ruchika Tripathi
    • 1
  • Kshama Rai
    • 1
  • Suruchi Singh
    • 1
  • Madhoolika Agrawal
    • 1
  • S. B. Agrawal
    • 1
    Email author
  1. 1.Department of Botany, Institute of Science, Laboratory of Air Pollution and Global Climate ChangeBanaras Hindu UniversityVaranasiIndia

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