[考題] 日/生科系/蘇睿智/植物生理學
Midterm Exam of Plant Physiology (2004.3.18)--total scores of 110
1.Here are some calculation and assay questions concesning the water potential
and water movement(40 points).
(1)Your window plant wilted because you forget to water it for almost one week
, and the solute potential of you plant is now equal to -0.712 Mpa. Your
kind roommate remind you to rescue it, and after watering its water
potential increase up to -0.238Mpa. What will happen to your plant in
appearance?(2 points)What factor causes this phenomenon? (2 points)And, what
are the changes of the factor in MPa unit?(5 points)
(2)What is the driving force that moves water through soil?(2 points)It is
expressed in positive or negative unit? (2 points)Please explain what are
the differences between field capacity and permanent wilting point?(6
points)
(3)There are two cells,A and B. Assuming that the pressure potential of both
is 0.2MPa. The A cell has a sucrose concentration of 0.1M,and its solute
poetntial is -0.244MPa. The sucrose concentration of B cell is 0.3M. What
is the water potential differences between these two cells?(5 points)
Where does the water will move to (A to B;or B to A)?and, why?(4 points)
(4)How does plant maintain the integrity of wate column in vascular tissue?
(6 points)And, how does it dissolve and/or prevent the problem of embolism?
(6 points)
2.List three unique properties of water that make it such a good medium for
cellular functioning, and explain how each property is useful to the plant
(12 points).
3.Describe in your answer the following contents:(1)water potential
differences,(2)type of transport,(3)the tissue, that water uptake and
radial transport through a root.(16 points)
4.Describe root pressure and indicate when it might occur?(6 points)
5.Why is it difficult to supply iron in nutrient solutions?(4 points)What is
the best way to overcome this difficulty?(4 points)
6.In practice, how do you determine a particular nutrient deficiency based on
symptom? Please list your order of judgment, and explain why?(5 points)
7.What mechanism governing the absorption and uptake of mineral ions from
soil particles into plant cells?Please use cation and anion as example to
explain.(6 points)
8.The observed concentrations of calcium and chloride inside of pea root cell
are 2 and 6 mM,respectively.These numbers are somehow different from those
predicted from Nernst equation, which are 5360 and 0.0136mM, respectively.
Please explain how does this phenomenon result from?(6 points)
9.What is the role mycorrhizae play to affect plant growth?(1 points)What are
the two types of mycorrhizae?(2 points)How do they work?(6 points)What
plants do they generally associate with?(2 points)
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.162.64.130
討論串 (同標題文章)
完整討論串 (本文為第 2 之 2 篇)：