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한국식물학회 / v.21, no.1_4, 1978년, pp.33-38 
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벼에 의한 인산흡수의 기작에 관한 연구
( A Kinetic Study of Phosphate Absorption by Rice Roots ) |
| 장남기; 서울대학교 사범대학 생물과;
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| 초 록 |
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| Phosphate absorption from a Na2H32PO4 solution by Oryza sativa L. was studied in order to elucidate kinetic mechanisms of ion transport. The rates of phosphate absorption from different concentraitons indicated the presence of dual mechanisms in root tips, one in the low (1$ imes$10-6 to 8$ imes$10-5M) and the other in the high (1$ imes$10-4 to 8$ imes$10-3M). A phosphate compensation point of phosphate transport was revealed with a 1$ imes$10-6M solution of Na2H32PO4. The kinetic model that ion transport involves an exchange reaction of absorption and desorptin is prosposed as follows: where C represents an ionic-specific organic carrier in the membrane; M, Mo and Mi are the mineral ions, M-outside and M-inside; MC is a carrier-ion complex; and the K's represent rate constants. In this model, the Mi velocity, v, is given by: {{{{v= {dMi} over {dt}= {(K1K3Mo-K2K4Mi) Ct} over {(K2＋K3)＋K1Mo＋K4Mi} }} where Ct is equal to C＋MC, and t is time. |
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| 키워드 |
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Journal of Plant Biology / v.21, no.1_4, 1978년, pp.33-38
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO197811920113108)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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