Abstract:
:The ribulose-1,5-bis-phosphate (RBPC) 14CO2 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(CO2) increased with temperature increase, but the values were similar among populations. The V max 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.
journal_name
Oecologiajournal_title
Oecologiaauthors
Castrillo Mdoi
10.1007/BF00317283subject
Has Abstractpub_date
1995-02-01 00:00:00pages
193-196issue
2eissn
0029-8549issn
1432-1939pii
10.1007/BF00317283journal_volume
101pub_type
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