Elevated ultraviolet-B radiation influences photosynthetic pigments and soluble carbohydrates of sweet almond [**Prunus dulcis** (Miller) D. Webb]
Faculty of Sciences. Bioscience Engineering
Electronic journal of environmental, agricultural and food chemistry. - -
, p. 1077-1084
University of Antwerp
Due to anthropogenic influences, solar UV-B irradiance at the earth's surface is increasing. To determine effects of enhanced UV-B radiation on sweet almond (Prunus dulcis), one-year old seedlings were submitted to four levels of UV-B radiation namely 0 (UV-BC), 0.45 (UV-B1), 1 (UV-B2), 1.50 (UV-B3), and 1.96 (UV-B3) W m-2 at a PAR intensity of 300 ì mol m-2 s-1 for 5 weeks. UV-B stress led to a significant decrease (p<0.05 ) in photosynthetic and non-photosynthetic pigments such as chlorophyll a, chlorophyll b, total chlorophyll and carotenoid content, whereas a significant increase was observed for UV-B absorbing pigments (flavonoid and anthocyanin), total soluble sugars and relative electrolyte conductivity. Most of the studied parameters were only affected at high UV-B levels (> UV-B3).