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한국식물학회 / v.25, no.1, 1982년, pp.21-36 
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연(Pb)에 의한 광계 II 활성억제에 미치는 인산 및 ATP 전처리의 보호효과
( Protective Effects of Phosphate and ATP Pretreatment on Pb-Inhibiting Photosystem II Activity ) |
| 성민웅; 경상대학교 사범대학 생물교육과;
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| The activity of photosystem II in isolated chloroplast form the leaves of Sedum sarmentosum was measured. The photoreduction rate of DCPIP by photosystem II showed the circadian rhythm with a peak at near midday sample for a continuing fine day and at near afternoon between nidday and sunset sample for a continuing cloudy day in summer. The optimum light intensity of photoreduction by photosystem II in the chloroplast preparation was about 5~9$ imes$$10^4$ lux. The saturated light intensity was over 9$ imes$$10^1$lux. Photosystem II activity was inhibited by even the lowest concentration of lead. When Pi and ATP of the same concentration as Pb were added to the reaction mixture containing Tris buffer lacking of Pi prior to Pb incubation, photosystem II activity was protected from Pb-inhibiting effect by the pretreament of Pi and ATP. It was assumed that Pb inhibiiton was probably due to one, P-depriving by the precipitates of $Pb_3$ $($Pb_4$)_2$ in the reaction mixture and the other, partially Pb-combing with Pi groups of the active site of photosystem II. |
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Journal of Plant Biology / v.25, no.1, 1982년, pp.21-36
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO198211920113416)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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