다환방향족탄화수소가 콩과 벼의 생육에 미치는 영향

Abstract

Polycyclic aromatic hydrocarbons (PAHs)are a group of ubiquitous hazardous pollutants derivedfrom fossil fuel, various combustion sources and pyrolysisof a wide range of plastics. Because PAHs can be uptakeinto crop plants, the inhibitory effects on rice and soybeanplants were examined in greenhouse and growth chamberexperiment. Soil-applied PAHs (phenanthrene of 0, 10, 30,100 ppm) slightly reduced the plant height and dry weightboth in transplanted rice and soybean plant. The inhibitoryeffect on growth was greater in soybean than rice. Plantheight of soybean plants treated by 100 ppm was 58.9 cmand this value was 87.2% of untreated plant. In rice plant,the plant height was less inhibited (96.0% of untreatedplant) by 100 ppm at 80 days after treatment (DAT). However, leaf chlorophyll content and chlorophyll fluorescencewere less inhibited by PAHs at late growth stage (afterheading) although the photosynthesis-related parameters wereslightly inhibited from 20 DAT to 70 DAT. In agar mediumexperiment with infant seedlings, inhibition of seedlinglength and fresh weight by phenanthrene at 100 ppm weregreater as compared to the experiment with adult plant inpot. Seedling length and fresh weight were reduced by54.2% and 33.3% for rice and 27.9% and 13.2% forsoybean, respectively. The results reflected that PAHs weremore inhibitory during juvenile stage than adult stage andmore inhibitory to rice plant than soybean for juvenile stage