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- Briefly explain the transpiration-cohesion-tension mechanism in plantWhen the plants are exposed to different environmental conditions, their growth is affected. How do plants face the so-calledphotosynthesis-transpiration compromise? Explain how the different environmental conditions (i.e. sunny, hot windy, dry day)may affect this compromise in a plant?Which phloem loading will involve sucrose-proton transporter and what are the correlating factors in determining the type of phloem loading pathways? *
- Describe the process of development of root nodules in leguminous plant. Name the oxygen scavenger molecule present in root nodules?What negative impacts will occur if transpiration in a plant is slowed down?What is plant transpiration? What are the two main types of plant transpiration process? Which of them is more significant in volume?
- Among the following combinations, which row is transpiration streams at respective cases? O Up the stem in the Across leaf via apoplast xylem patway mass flow osmosis Up the stem in the xylem osmosis Across leaf vla apoplast patway mass flow Up the stem in the Across leaf via apoplast xylem patway mass flow mass flow Up the stem in the Across leaf via apoplast xylem patway mass flow mass flow Out of leaf via stomata diffusion Out of leaf via stomata osmosis Out of leaf via stomata diffusion Out of leaf via stomata osmosis Into root Across root via symplast cells pathway diffusion osmosis Into root cells diffusion Into root cells osmosis Into root cells osmosis Across root via symplast pathway osmosis Across root via symplast pathway osmosis Across root via symplast pathway osmosisDescribe the hypothesis of pressure flow for the transportation of sugars in the plants.Define the process of transpiration and state the possible advantages and disadvantages of transpiration in plants.
- How would you expect the rate of transpiration to be affected by the following and why?: b. The sun rising over a CAM plant. Your answerWhat are some of the environmental factors which influence the rate of transpiration? Discuss the advantages and disadvantages of the transpiration process in plants? What strategies have evolved by which plants are able to reduce their transpiration rates and thus conserve water? What tissue/s did you find the dye along the stem?Scientists studied what caused leaf shedding in a drought deciduous (=shedding leaves during the dry season) subtropical species. They quantified the quantum yield (=efficiency) of the PSII complex and the leaf hydraulic conductance (=efficiency of leaf water movement) in leaves of that species during the wet to dry transition Explain the results in the context of what could drive leaf shedding in this species? Figure 1. Changes in leaf hydraulic conductance during the wet and dry season transition of a subtropical species