Assessing genotypic variability of cowpea (Vigna unguiculata [L.] Walp.) to current and projected ultraviolet-B radiation

Journal of Photochemistry and Photobiology. B, Biology
Shardendu K SinghK R Reddy

Abstract

The current and projected terrestrial ultraviolet-B (UV-B) radiation affects growth and reproductive potential of many crops. Cowpea (Vigna unguiculata [L.] Walp.), mostly grown in tropical and sub-tropical regions may already be experiencing critical doses of UV-B radiation due to a thinner ozone column in those regions. Better understanding of genotypic variability to UV-B radiation is a prerequisite in developing genotypes tolerant to current and projected changes in UV-B radiation. An experiment was conducted in sunlit, controlled environment chambers to evaluate the sensitivity of cowpea genotypes to a range of UV-B radiation levels. Six cowpea genotypes [Prima, California Blackeye (CB)-5, CB-27, CB-46, Mississippi Pinkeye (MPE) and UCR-193], representing origin of different geographical locations, were grown at 30/22 degrees C day/night temperature from seeding to maturity. Four biologically effective ultraviolet-B radiation treatments of 0 (control), 5, 10, and 15 kJ m(-2)d(-1) were imposed from eight days after emergence to maturity. Significant genotypic variability was observed for UV-B responsiveness of eighteen plant attributes measured. The magnitude of the sensitivity to UV-B radiation also varied among cowpea gen...Continue Reading

References

Jan 1, 1997·Trends in Ecology & Evolution·J RozemaM Caldwell
Mar 1, 1994·Photosynthesis Research·A H Teramura, J H Sullivan

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Citations

Aug 20, 2010·Journal of Photochemistry and Photobiology. B, Biology·Tomasz HuraMaciej Grzesiak
Apr 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Kshama Rai, Shashi Bhushan Agrawal

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