고등 식물의 생태 및 생리적 적응과 분화 = Ecological and physiological adaption and differentiation of higher plants

다국어 초록 (Multilingual Abstract)

Various effects of simulated acid rain by HNO_3 and H_2SO_4 with pH 3.2, 4.2 and 5.6 were investigated in Melilotus suaveolens Ledeb, a biennial legume dominating the disturbed and poor soil vegetations. The nitric acid treatment of pH 3.2 resulted in 121% increase of the plant height compared to that of pH 5.6 during early growth, although 17% decrease was detected with the sulfuric acids. During 14 days of treatment, leaf biomass and chlorophyll content increased 168% and 133% with pH 3.2 nitric acid rain but decreased 20% and 38%, respectively, with sulfuric acid rain Nitrogen content in various organs was also determined after 42days of nitric acid treatment It increased 480% and 387% by pH 3.2 and 4.2 in leaves, 212% and 214% in stems and 247% and 249% in roots. However, the same treatment with the sulfuric acid showed a considerable reduction in this content, indicating that the nitric acid was a nitrogen source. Nodule formation assayed revealed 15% decrease with pH 3.2 in contrast to 157% increase in pH 4.2, further suggesting an enhancement effect by the additional nitrogen source Contrary to this, the nodule formation was reduced up to 43-71% by sulfuric acid rains Specific nitrogen fixation activities of nodules estimated at pH 3.2, 4.2 and 5.6 nitric acid rain were 367, 428 and 473 ? mol C_2H_4＊g^-1 fr wt nodule＊h^-1, while those of sulfuric acid rain were 411, 825 and 1117 respectively. The total nitrogen fixation analysed with the nitric acid rain exhibited 1 nmol C_2H_4＊plant^-1＊h^-1 with pH 3.2, 177 with pH 4.2 and 179 with pH 5.6, yet it increased 2, 115 and 286 respectively corresponding to the three sulfuric acid concentrations. Further implications of the simulated acid rain were also discussed in the study.

목차 (Table of Contents)

• 산성비가 전동싸리의 생장과 질소고정 활성에 미치는 영향
• 인용문헌
• Chromosome analysis by fluorescence in situ hybridization of callus-derived regenerants in Allium cyaneum R
• 한국산 선씀바귀복합체 (국화과: 상치족)의 종분화 양상에 대한 연구 - 외부형태학적 변이와 알로자임 변이를 중심으로
• 참고문헌