Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 60, Issue 9, Pages 2481-2492Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erp141
Keywords
ADPglucose pyrophosphorylase; ADPglucose transporter; Brittle1; cereal grain; endosperm; genome duplication
Categories
Funding
- BBSRC
- BBSRC [BB/E007015/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/E007015/1] Funding Source: researchfish
Ask authors/readers for more resources
In most species, the precursor for starch synthesis, ADPglucose, is made exclusively in the plastids by the enzyme ADPglucose pyrophosphorylase (AGPase). However, in the endosperm of grasses, including the economically important cereals, ADPglucose is also made in the cytosol via a cytosolic form of AGPase. Cytosolic ADPglucose is imported into plastids for starch synthesis via an ADPglucose/ADP antiporter (ADPglucose transporter) in the plastid envelope. The genes encoding the two subunits of cytosolic AGPase and the ADPglucose transporter are unique to grasses. In this review, the evolutionary origins of this unique endosperm pathway of ADPglucose synthesis and its functional significance are discussed. It is proposed that the genes encoding the pathway originated from a whole-genome-duplication event in an early ancestor of the grasses.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available