1.Briefly explain the three possible pathways of energy transfer (energy fates)
ID: 33820 • Letter: 1
Question
1.Briefly explain the three possible pathways of energy transfer (energy fates) that can happen when a chlorophyll molecule in the thylakoid membrane of a chloroplast absorbs the energy of a photon of light.
2.With the LICOR 6400, you measure stomatal conductance on a well-watered plant and a very water-stressed plant of the same species. Which plant would you expect to have the lower stomatal conductance? Briefly explain why.
3.Using the LICOR 6400, you measure a relatively high rate of net photosynthesis on Plant A, and a lower rate of net photosynthesis on Plant B. Does this necessarily mean that Plant A is growing faster than plant B? Explain in 1-3 sentences maximum.
Explanation / Answer
The three possible pathways are A) light reaction B) C3 pathway and C) C4 pathway.
The water stressed plant would have lower stomatal conductance when compared with well-watered plant. This is because the uptake of carbon dioxide and water loss are very low in the water stressed plant, as the availability of the resource not enough to perform any function. Hence, the stomata are always closed to retain the available energy.
It is not likely to conclude that Plant A is growing faster than the plant B. This is because the rate of photosynthesis is dependent on various factors like availability of carbon dioxide, water, minerals, proper functioning of phytohormones etc. If the plants are provided with all necessary minerals and nutrients, any plant can show rapid growth. In addition, the levels of phytohormones are also crucial in growth of the plant. If certain hormones like auxins, gibberellins and cytokins are triggered more than the normal level, there is possibility of rapid growth in the plants than compared to the normal plants.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.