Castrillo Marisol
Depto. Biología de Organismos, Universidad Simón Bolívar, Apdo. Postal 89000, Caracas, Venezuela.
Oecologia. 1995 Feb;101(2):193-196. doi: 10.1007/BF00317283.
The ribulose-1,5-bis-phosphate (RBPC) CO fixation rate was measured at four different temperatures, 5°, 15°, 25° and 35° C, in three populations of Espeletia schultzii at different altitudes, 3100, 3550 and 4200 ma.s.l. The fixation rate increased with temperature increase in the populations studied. The population at 4200 m showed the higher rate at any temperature, followed by those at 3550 and 3100 m. The Km(CO) increased with temperature increase, but the values were similar among populations. The V values increased with temperature and were higher for the 4200-m population. These results suggest that the RBPC enzyme is more activated in the highland population and that the enzyme kinetics are not similar among populations.
在海拔3100米、3550米和4200米的三个不同高度的舒氏埃斯佩莱提亚种群中，于5℃、15℃、25℃和35℃这四个不同温度下测量了1,5 - 二磷酸核酮糖（RBPC）的二氧化碳固定速率。在所研究的种群中，固定速率随温度升高而增加。4200米处的种群在任何温度下都显示出较高的速率，其次是3550米和3100米处的种群。Km（二氧化碳）随温度升高而增加，但种群间的值相似。V值随温度升高，且4200米处的种群V值更高。这些结果表明，RBPC酶在高地种群中更具活性，并且种群间酶动力学不相似。
