This study was performed to develop the biological treatment technology of wastewater polluted with heavy metals. Zinc-tolerant microorganism, such as Pseudomonas chlororaphis which possessed the ability to accumulate zinc, was isolated from industrial wastewaters polluted with various heavy metals. The characteristics of zinc accumulation in the cells, recovery of the zinc from the cells accumulating zinc, were investigated. Removal rate of zinc from the solution containing 100 ㎎/ℓ of zinc by zinc-tolerant microorganism was more than 90% at 48 hours after inoculation of the microorganisms. A large number of the electron-dense granules were found mainly on the cell wall and membrane fractions, when determined by transmission electron microscope. Energy dispersive X-ray spectroscopy revealed that the electron-dense granules were zinc complex with the substances binding heavy metals. The zinc accumulated into cells was not desorbed by distilled water, but more than 80% of the zinc accumulated was desorbed by 0.1M-EDTA. The residues of the cells after combustion at 550℃ amounted to about 21% of the dry weight of the cells. EDS analysis showed that the residues were comparatively pure zinc compounds containing more than 79% of zinc.

도복에 관여하는 유용형질들을 조사하고 이들과 관련정도를 밝히기 위하여 형질간의 상호비교, 유전력, 표현형 상관과 유전상관, 경로계수를 분석한 결과를 요약하면 다음과 같다. 1. 포장도복정도의 관련정도가 높은 형질들은 간장, 하중비(Wl/P), Wl, 단립간 직경휨모멘트 (Wl/ d), 도복지수(L), Wl/A, 단립간 하중(W/l), P(임계도복하중), 임계도복하중지수(W s2 / l4 )등이었다. 2. 좌절하중(S)은 포장도복과 유의한 부의 상관을 보였다.(r=-0.3986* ) 3. 간경, 줄기단면적, 간벽 두께, 줄기 단면의 2차 관성모멘트는 포장도복과 상관을 보이지 않았다. 4. 간장, 엽중, 도복지수는 유전력이 높아서 육종을 위한 선발형질로서 지표가 될 수 있으리라 생각된다. 5. 직접, 간접효과는 정의 상관으로 간벽의 두께( P7y=0.6904), 엽중( P3y=0.2848), 근중( P1y=0.2658), 간경( P6y=0.2288)의 순이었으며 부의 상관은 간장 ( P5y=0.9640), 경중( P2y=-0.7072)의 순으로 나타나서, 간벽 두께가 두껍고 간장과 경중이 적을수록 도복에 강한 것으로 나타났다.강한 것으로 나타났다.