Starch synthesis and carbon partitioning in developing endosperm.
The biosynthesis of starch is the major determinant of yield in cereal grains. In this short review, attention is focused on the synthesis of the soluble substrate for starch synthesis, ADPglucose (ADPG). Consideration is given to the pathway of ADPG production, its subcellular compartmentation, and the role of metabolite transporters in mediating its delivery to the site of starch synthesis. As ADPG is an activated sugar, the dependence of its production on respiration, changes which occur during development, and the constraints which ATP production may place on carbon partitioning into different end-products are discussed.
Emes
M J
MJ
School of Biological Sciences, University of Manchester, 3.614 Stopford Building, Manchester M13 9PT, UK. memes@uoguelph.ca
Bowsher
C G
CG
Hedley
C
C
Burrell
M M
MM
Scrase-Field
E S F
ES
Tetlow
I J
IJ
D000245:Adenosine Diphosphate Glucose / Q000096:biosynthesis / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D000968:Antimycin A / Q000494:pharmacology; D001692:Biological Transport / Q000502:physiology; D050260:Carbohydrate Metabolism; D002244:Carbon / Q000378:metabolism*; D019069:Cell Respiration / Q000187:drug effects / Q000502:physiology; D002523:Edible Grain / Q000254:growth & development / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D018087:Plastids / Q000502:physiology; D012639:Seeds / Q000254:growth & development / Q000378:metabolism*; D013213:Starch / Q000096:biosynthesis*
D010940:Plant Proteins; D000245:Adenosine Diphosphate Glucose; D000968:Antimycin A; D002244:Carbon; D000255:Adenosine Triphosphate; D013213:Starch; D010100:Oxygen