7Albert KR, Rinnan R, Ro-Poulsen H, et al. 2008. Solar uhravi- olet-B radiation at Zackenberg: The impact on higher plants and soil microbial communities. Advances in Ecological Re- search, 40: 421-440.
8Beggs CJ, Stolzer-Jehle A, Wellmann E. 1985. Isoflavonoid for- mation as an indication of UV stress in bean (Phaseolus vulgaris L.) leaves: The significance of photorepair in as- sessing potential damage by increased solar UV-B radiation. Plant Physiology, 79: 630-634.
9Bradford MM. 1976. A rapid and sensitive method for quantita- tion of microgram quantities of protein utilizing the principle of protein dye binding. Analytical Biochemistry, 72: 248- 254.
10Correia CM, Coutinho JF, BjOrn LO, et al. 2000. Uhraviolet-B radiation and nitrogen effects on growth and yield of maize under Mediterranean field eonditions. European Journal of Agronomy, 12: 117-125.