Oxygen Inhibition of Photosynthesis: II. Kinetic Characteristics as Affected by Temperature 1

AUTOR(ES)

Ku, Sun-Ben

RESUMO

The response of whole leaf photosynthesis of wheat (Triticum aestivum L.) in relation to soluble CO2 available to the mesophyll cells, under low (1.5%) O2 at 25, 30, and 35 C, followed Michaelis-Menten kinetics up to saturating CO2 but deviated at high CO2 levels where the experimental Vmax is considerably less than the calculated Vmax. The affinity of the leaves for CO2 during photosynthesis was similar from 25 to 35 C with Km (CO2) values of approximately 3.5 to 5 μM.

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