Question:

Who amongst the following proposed the law of limiting factors?

Updated On: Jun 7, 2022
  • Blackman
  • M. Calvin
  • W.M. Stanley
  • David Tilman
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The Correct Option is A

Solution and Explanation

A limiting factor is defined as a factor which is deficient to such an extent that increase in its magnitude directly increases the rate of the process. The effect of limiting factors was studied by Blackman in 1905. Blackman (1905) studied the effect of COconcentration, light intensity and temperature on rate of photosynthesis. He formulated the principle of limiting factors which states that when a process is conditioned as to its rapidity by a number of separate factors, the rate of the process is limited by the pace of the slowest factor.
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Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

  • Light Reaction
  • Dark Reaction

Light Reaction:

  • This phenomenon occurs in the presence of light.
  • The pigment absorbs light and produces energy in the form of ATP.
  • The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

  1. Calvin Cycle (C3 Cycle)
  2. C4 Cycle (Hatch and Slack Pathway)