Factors Affecting Photosynthesis | Class 10th, 11th, and NEET
Concept of Cardinal Values: Numerous environmental elements affect metabolic processes. The magnitude of each element affects the rate of a metabolic process. Sachs (1860) identified three crucial values for each factor, referred to as the cardinal values or magnitude points. These are the minimal, optimal, and maximal values. The cardinal minimum value is the factor magnitude below which the metabolic process cannot proceed.
The optimal value is the one at which the metabolic process is most rapid. The maximum is the magnitude of a factor at which the process comes to a halt. A metabolic process’ rate declines at magnitudes below and above the optimum until the minimum and maximum values are attained.
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