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How do you compute dark respiration (Rd) and what does the value tell you about the plant?
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- What is the purpose of the oil in determining the transpiration of a plant? How will it affect the experiment if there is no oil added?How do you compute quantum yield (Φ) and what does the value tell you about the plant?Briefly describe the pigments used in photosynthesis, where these pigments are located in the plant, and what these pigments do. Define both absorption spectrum and action spectrum, and describe the purpose of using a spectrophotometer to determine the absorption spectrum and how that correlates to the action spectrum. Be sure to discuss how the spectrophotometer allows the identification of the pigment solutions.
- In a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Explain the reason for the differences in pH between the stroma and the thylakoid lumen.How would you expect the rate of transpiration to be affected by the following and why?: b. The sun rising over a CAM plant.How do you compute maximum electron transport (Jmax) and what does the value tell you about the plant?
- In a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Describe the stages of photosynthesis. Explain the need for a constant supply of inorganic carbon dioxide.Question: Calculate the transpiration rate for the grape leaf above with a leaf surface area of 18 cm2. Air temperature was 21 degrees C, reference relative humidity was 35%, experimental relative humidity was 43%, air flow rate was 125 mL/min, and barometric pressure was 759 mm Hg (1 mm Hg = 1.33322 mbar). a) 0.0000957 b) 0.05 c) 24.68 d) 1.011914Calculate the transpiration rate for the grape leaf above with a leaf surface area of 18 cm2. Air temperature was 21 degrees C, reference relative humidity was 35%, experimental relative humidity was 43%, air flow rate was 125 mL/min, and barometric pressure was 759 mm Hg (1 mm Hg = 1.33322 mbar). a) 0.0000957 b) 0.05 c) 24.68 d) 1.011914
- What is the benefit of Photorespiration in plants and what problem does it pose in many plants?What is photorespiration, what is its cause, and why is it believed to be wasteful?Based on the vein density results and your knowledge of how the light treatments would impact the light reactions of photosynthesis, how can you explain the high starch concentration and low photosynthetic capacity value in symplastic loader individuals grown in low light and transferred to high light for one week prior to the measurements? Figure Legend: Figure 1. Spinach is an apoplastic phloem loader, while pumpkin is a symplastic phloem loader. An experiment was performed where spinach and pumpkin individuals were grown under three conditions LL - in low light environment (grey bars) HL- in high light environment (white bars) LL->HL in low light environment and then transferred to a high light environment for one week prior to measurements (dark stripes bars) The following measurements were performed on individuals of the two species growing in the three different treatments: vein density, starch content in leaves, and photosynthetic capacity. Statistical tests were performed…