课程名称︰植物营养学
课程性质︰农化系必修
课程教师︰钟仁赐
开课学院：生农学院
开课系所︰农化系
考试日期（年月日）︰2014.06.19
考试时限（分钟）：10:20~12:10, 110 min
是否需发放奖励金：是
试题 :
1.Nitrogen is taken up as NO3- by roots and converted into NO2-, and then to
NH4+, and the amide nitrogen of glutamine. What are the enzymatic steps of
this assimilatory process? (10 points)
2.What are presumably the related mechanisms that resulted in the most distinct
zinc deficiency symptoms-"stunted growth" and "little leaf"? (10 points)
3.Why graminaceous and dicotyledonous species differ in the requirement in the
calcium, boron and silicon? (10 points)
4.Descibe the four groups of plant species classified according to the differe-
nces in their growth response to sodium. (10 points)
5.Describe the nutrients that are directly involved in the photosynthesis and
the reactions involved. (20 points)
6.What are the five "classical" classes of phytohormones in higher plants?
(10 points)
7.Photorespiration is generally considered to be a wasteful process that decre-
ases the yield of C3 plants. What is photorespiration? Discuss the meaning
and significance of photorespiration of C3 plants. (10 points)
8.The sinks of solutes (sugar, amino acids, nutrients) delivered in the sieve
elements can be differentiated into (1) utilization sinks an (2) storage sin-
ks in which photosynthates are mainly accumulated. There is competition betw-
een the two sinks for the solutes. Which one is the stronger competitor? Why?
(10 points)
9.Explain the following terms: (10 points)
(1) vegetative storage organs;
(2) proteoid roots;
(3) collection phloem;
(4) the leaf area index (LAI)
(5) depolarization of the membrane potential.