c4 ps

[Johnson, Jane]

There are specific transporters to move malate into the bundle sheath cells.
These organic acids typically will not diffuse across the membrane.  The
enzyme required for the decarboxylation is located in the bundle sheath
cells.
A good plant physiology text such as Taiz and Zeiger, Hopkins or Salisbury
and Ross  should be able to provide additional information.

Jane Johnson
CNR Building
University of Wisconsin - Stevens Point
Stevens Point, WI 54481


	----------
	From:  tia1+ at PITT.EDU [SMTP:tia1+ at PITT.EDU]
	Sent:  Tuesday, September 22, 1998 10:19 AM
	To:  plant-ed at net.bio.net
	Subject:  c4 ps

	Can anyone help me with a question I recieved in my introdutory
botany
	class regardig c4 photosynthesis?

	The student asked what keeps malate from being decarboxylated into
co2 and
	pyruvate in the mesophyll (what keeps it moving to the bundle sheath
for
	this reaction rather than just happening in the meosphyll)

	thanks!
	Tia-Lynn Ashman
	Assistant Professor 
	Department of Biological Sciences
	University of Pittsburgh
	Pittsburgh, PA 15260

	Office: 412-624-0984 
	Fax: 412-624-4759 
	Email: tia1+ at pitt.edu