课程名称︰植物营养学 课程性质︰大三系定必修 课程教师︰锺仁赐 教授 开课学院：生物资源暨农学院 开课系所︰农业化学系 考试日期（年月日）︰2008年01月17日 考试时限（分钟）：110 mins 是否需发放奖励金：YES!! （如未明确表示，则不予发放） 试题 : 1. What is the role of electron transport in oxygen-evolving photosynthesis? Name the final electron donor and final electron acceptor in photosynthsis. ( 5 points) 2. What is photorespiration? Discuss the meaning and significance of photo- respiration of C3 plants. (10 points) 3. If the level of atmospheric CO2 was to double, how would the following be affected? Explain your answer. (10 points) (1) Rate of oxaloacetate synthesis in C4 plants. (2) Rate of 3-phosphoglycerate synthesis in C3 plants. (3) Rate of photorespiration in C3 plants. (4) Yield of rice in Taiwan. 4. Describe the pressure-flow model of translocation in the phloem. Does water move down its water potential gradient in this model? ( 5 points) 5. What are meant by "secondary product" and "primary product"? ( 5 points) 6. Discuss the strategies of iron uptake of plants under iron deficient condi- tions. (10 points) 7. Describe root presure, indicate when it might occur and how to know the existence of root presure. (10 points) 8. What is meant by the term "active transport"? What is the difference be- tween "primary" and "secondary" active transport? ( 5 points) 9. Why do dicotyledenous plants have higher boron and calcium requirement than monocots? ( 5 points) 10.Classify the plant mineral elements according to their phloem mobility into low and high. ( 5 points) 11.Upland plants "wilt" and "die" after flooding for one or two days. Discuss the reason(s) for "wilting" and "death". (10 points) 12.What are the factors affecting nitrate reductase activity? (10 points) 13.By what mechanisms do the plants maintain a high pH level in the range of 7.3~7.6 in cytosol? ( 5 points) 14.In which organ is sulfate mainly reduced? What form of sulfur can be cycled via phloem in order to cover root demand? What compound is the first stable product in which sulfur is present in a reduced organically bound form? ( 5 points) --

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