Chl a Fluorescence Characterization and Biomarker Selection from Ricciocarpos natans under Cadmium Stress
카드뮴 독성 평가를 위한 은행이끼의 엽록소형광 분석 및 환경지표 선발

Soonja Oh, Seok Chan Koh
2013 Journal of Environmental Science International  
The effects of cadmium ions (Cd 2+ ) on the Chl a fluorescence of Ricciocarpos natans were investigated in order to determine whether Chl fluorescence can be used as a biomarker to estimate the physiological responses of plants to cadmium stress. In all plants treated with Cd 2+ , the image of Fv/Fm, which represents the maximum photochemical efficiency of PSⅡ, changed as the Cd 2+ concentration increased, when treated for 48 h or more. Changes of ΦPSⅡ and QP images were recognized even at 10
more » ... gnized even at 10 µM Cd 2+ . The Chl a O-J-I-P fluorescence transient was also affected even at 10 µM Cd 2+ . The fluorescence yield decreased considerably in steps J, I and P in plants treated with Cd 2+ , although a typical polyphasic rise was observed in non-treated plants. The Chl fluorescence parameters, Fm, Fv/Fo, Sm, SFIabs, PIabs and ETo/CS, decreased as the Cd 2+ concentration increased, while the Mo and Kn parameters increased. Peroxidase activity decreased significantly and catalase activity increased as the Cd 2+ concentration increased. Because of its sensitivity to Cd 2+ Ricciocarpos natans is useful in experiments investigating the responses of plants to cadmium exposure. Several parameters (Fm, Fv/Fo, Sm, SFIabs, PIabs, ETo/CS, Mo and Kn) can be applied to determine quantitatively the physiological states of plants under cadmium stress.
doi:10.5322/jesi.2013.22.11.1403 fatcat:t6nsbf4tiva4hdaztlrrkkka4e