Refer to the graph below showing the results of Bjorkman and colleagues studies
ID: 279955 • Letter: R
Question
Refer to the graph below showing the results of Bjorkman and colleagues studies of plant responses to different light levels. The plants were reared at three different levels of light intensity: high (red line), medium (blue line), and low (green line). The acclimatized plants were then subjected to various light levels, and their ability to photosynthesize was measured?
What is the light compensation point for those plants that are acclimatized to high-intensity light?
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A. less than 200 umol/m2/s
B. 200-500 umol/m2/s
C. 500-800 umol/m2/s
D. 1000 umol/m2/s
E. 1500 umol/m2/s
Growth light environment 920 umol/m2s 40 -- 290 umol/m2ls 92 ?mol/m2/s 30 £ 20 0 500 1,000 1,500 2,000 Incident light (umol/m2/s)Explanation / Answer
Light compensation point in the light curve is defined as the light intensity where the rate of photosynthesis is equal to the rate of respiration. From the light intensity curve given in the picture, the light compensation point for high intensity light is found to be around 50 until/m2/s. So, the answer for this question is option A (less than 200 umol/m2/s).
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