There has been and remains great interest in developing safe and effective herbicides. In some situations, it would be desirable to have a herbicide that killed a wide variety of different plants,
but in other cases it would be best to have a herbicide that was much more selective.
a) What plant activity would you target to kill the widest variety of plants?
b) What plant activity would you target to kill C4 plants?
c) What plant activity would you target to kill CAM plants?
Be as specific as possible.
What will be an ideal response?
Answer:
a) The best general herbicide would target an activity of virtually all plants, such as photosynthesis. Atrazine blocks D1 protein electron transfer in the PSII complex. Another good target might be the mobile soluble plastocyanin protein that transfers electrons to PSI.
b) C4 plants would be more specifically killed by an inhibitor of the Hatch–Slack pathway, such as an inhibitor of the specific cytosolic PEP carboxylase form that is abundant in C4 mesophyll cells.
c) CAM plants would be more specifically killed by an inhibitor that targets conversion of oxaloacetate to malate or by an activator PEP carboxylase activity, which would cause a futile cycle.
You might also like to view...
Which structure is the end of the uterus and produces different kinds of mucus capable of either blocking or guiding sperm through the opening into the uterus?
A. uterus B. cervix C. vagina D. ovary E. fallopian tube or oviduct
A heart attack or myocardial infarction is due to the sudden death of heart tissue due to lack of oxygen.
a. true b. false
Which of these types of islands is predicted to have the lowest number of species?
A. small island near mainland B. large island near mainland C. large island far from mainland D. small island far from mainland E. the island closest to mainland regardless of size
What is the correct term for proteins embedded in the plasma membrane that form a gap junction?
a. claudins b. cadherins c. occludins d. connexins