課程名稱︰植物營養學
課程性質︰系定必修
課程教師︰鍾仁賜教授
開課學院：生物資源暨農學院
開課系所︰農業化學系
考試日期（年月日）︰2010年06月24日
考試時限（分鐘）：110 mins
是否需發放獎勵金：YES!!
（如未明確表示，則不予發放）
試題 :
1. Describe the differences between calcicole and calcifuge from the point of
plant nutrition. What is the probable reason(s) for these differences?
(10 points)
2. What are pholem mobile nutrients? Classify the following mineral nutrients
of higher plants into high and low mobility: nitrogen, phosphorus, pota-
ssium, calcium, magnesium, sulfur, manganese, iron, boron, and zinc.
(5 points)
3. Discuss the syrategies of iron uptake of plants under iron deficient con-
ditions.
(5 points)
4. Describe root pressure, indicate when it might occur and how to know the
existence of root pressure.
(10 points)
5. Explain the concepts of source and sink in phloem transport. Leaves are
said to be sinks early in development and to become sources as they attain
photosynthetic competence. What experiments would you design to study the
leaf transition from sink to source?
(10 points)
6. Describe the pressure-flow model of translocation in the phloem. Does water
move down its water potential gradient in this model?
(10 points)
7. Describe the N assimilation procedures from nitrate to the first amino acid
produced in plants, including the related enzyme and the organs or orga-
nelle where the reactions take place.
(10 points)
8. What is a mineral deficiency? How can a mineral deficiency be recognized?
(10 points)
9. From the standpoint of soil properties and plant characteristics give the
reasons for the relative bioavailability of heavy metals followed the se-
quences: Cd > Zn > Ni > Cu > Cr > Pb.
(10 points)
10.Discuss the following results (Table 1) of study as affected by silicon
(Si).
(10 points)
Table 1. Effect of silicon on the rice plant in ferrous sulfate solution
———————————————————————————————————————
Part Dry weight SiO2 content Amount of H2O Amount of Fe Amount of
Top Root Top Root uptake uptake Fe3+ solution
(g/plant) (g/kg) (mL/plant) (μg/plant) (μg/L)
———————————————————————————————————————
+Si top 3.1 --- 18 --- 16 200 22.7
excised
-Si top 3.2 --- 0 --- 21 197 19.3
excised
+Si top 3.4 1.5 21 10 26 168 300
intact
-Si top 3.4 1.5 0 0 29 217 25.7
intact
———————————————————————————————————————
11.Explain the following terms: (20 points)
(1) system and product
(2) secondary metabolites
(3) phloem loading
(4) apical dominance
(5) acid-growth theory
(6) biological yield
(7) leaf area index
(8) lime induces chlorosis
(9) guttation
(10)Viets effect
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