Studing grain yield and quality traits of sweet corn (Zea mays L. var. Sacarata) under water deficit, ultraviolet radiation and increasing carbon dioxide treatments

Document Type : Research Paper

Authors

1 M.Sc. students in Agronomy Department, Faculty of Agriculture, Tarbiat Modares University

2 Professor in Crop Physiology, Agronomy Department, Faculty of Agriculture, Tarbiat Modares University, Nasr Bridge, Tehran, Iran

3 Associate Professor in Plant Science Department, Faculty of Biological Sciences, Tarbiat Modares University, I.R. of IRAN

4 M.Sc. student in Agronomy, Karaj Payamnour University

5 Assistant Professor, Faculty of Agriculture, Zanjan University

Abstract

Water deficit, ultraviolet radiation and carbon dioxide enrichment are the most important environmental factors in global climate change. This research was conducted in Tarbiat Modares University, Research Greenhouse and the objective of that was to study the effects of three levels of carbon dioxide (500, 900 and 1300 ppm), UV-radiation (UV-A, B and C with intensity of 18, 25 and 40 µW.cm2 respectively) and water deficit (common irrigation and 40 percent of available water remain in soil) on grain yield, some quality traits of sweet corn (Zea mays L. var. Sacarata). The experiment was conducted as factorial arrangement in randomized complete block design with three replications in one year (2009). The results showed that interaction among UV-C radiation, elevated CO2 and water stress had a significant effect on grain yield and Fv/Fm. The highest grain yield was obtained in water deficit and 900 (µl/l) CO2 concentration. The most content Fv/Fm was obtained under water deficit and 1300 (µl/l) CO2 concentration. Water deficit and elevated CO2 increased proline, and decreased chlorophyll a, chlorophyll b, chlorophyll a+b, carotenoids and flavonoids. Grain protein decreased with wavelength UV reduction. Above result showed that three main environmental stresses reduced plant productivity strategy in most condition and as a result decreased the performance of corn plant.
 

Keywords

References

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Iranian Journal of Field Crop Science
Volume 45, Issue 3 - Serial Number 3
October 2014
Pages 335-344

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History

  • Receive Date: 05 March 2013
  • Revise Date: 19 May 2015
  • Accept Date: 28 August 2013
  • Publish Date: 23 September 2014

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