무에서 니켈 독성검정을 위한 생육 및 생리반응 비교 -II. 니켈에 의한 무의 생리반응-

Comparison of Growth and Physiological Responses in Radish for Assay of Nickel Toxicity -II. Effect of Ni on Physiological Responses in Radish-

니켈독성의 생물검정에 있어서 지표식물로 무를 이용하였고 수경재배 조건하에서 니켈용액의 농도에 따른 무종자의 발아율, 세포신장, ${\alpha}-amylase$ 활성도, 엽록소, 단백질함량을 조사한 결과 니켈처리농도를 증가시키면 종자의 발아초기에는 농도의존적으로 ${\alpha}-amylase$의 활성도가 크게 저해를 받기 시작하였으며, 발아후 생장단계에서는 엽록소 b와 a의 함량이 크게 저해를 받았다.

The present study was carried out to investigate the effect of Ni on germination, cell elongation, ${\alpha}-amylase$ activity, contents of chlorophyll and protein in radish were determined in the water culture. As the concentration of Ni was increased in the water culture, germination of radish was 55% by Ni 10 mg/kg and 30% by Ni 20 mg/kg. The ratio of cell elongation injury was 50%, by two days after Ni 20 mg/kg treatment. The injury ratio of ${\alpha}-amylase$ activity was 45% in the same condition and as the time goes on, inhibition of ${\alpha}-amylase$ activity were slightly decreased. Contents of chlorophyll a and b were decreased two days after treatment and chlorophyll a was more inhibited than chlorophyll b. Also changes of the protein contents was slightly decreased. Activity of ${\alpha}-amylase$ was decreased at germination stage, contents of chlorophyll a and b were decreased at growing stage.