engleski

Cadmium contamination effect on parameters of photosynthetic efficiency in soybean

Cadmium is a non-essential heavy metal whose presence in the agricultural soil is a significant problem in terms of its entry into the food chain. The study was conducted during two years (2012 and 2013) on six soybean genotypes grown in soil with four different levels of cadmium contamination (0, 0.5, 1 and 5 mg Cd kg-1 soil). Soil was contaminated with 10 mL of CdCl2 solution kg-1, prepared and calculated for each treatment separately (B2- B4). Performance index (PIABS) and maximum efficiency of photosystem II (Fv/Fm) were measured on soybean leaves in R5 development stage. PIABS and Fv/Fm values of different soybean genotypes showed continuous decrease with increase of cadmium contamination in the soil. Analysis of variance showed significant differences between years and treatments but not within genotypes for both investigated parameters. Measuring of photosynthetic efficiency parameters is a very rapid and non- invasive method which can be used for early detection of stress caused by cadmium contamination of soil.

cadmium ; soybean ; photosynthetic efficiency ; performance index ; maximum efficiency of photosystem II

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