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Orchestration of carbohydrate processing for crassulacean acid metabolism

Lookup NU author(s): Emerita Professor Anne Borland



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


The production of phosphoenolpyruvate as a substrate for nocturnal CO2 uptake represents a significant sink for carbohydrate in CAM plants which has to be balanced with the provisioning of carbohydrate for growth and maintenance. In starch-storing CAM species, diversification in chloroplast metabolite transporters, and the deployment of both phosphorolytic and hydrolytic routes of starch degradation accommodate a division of labour in directing C-skeletons towards nocturnal carboxylation or production of sucrose for growth. In soluble-sugar storing CAM plants, the vacuole plays a central role in managing carbon homeostasis. The molecular identities of various types of vacuolar sugar transporters have only been identified for C3 species within the last 10 years. The recent availability of CAM genomes enables the identification of putative orthologues of vacuolar sugar transporters which represent strategic targets for orchestrating the diel provisioning of substrate for nocturnal carboxylation and growth.

Publication metadata

Author(s): Borland AM, Guo HB, Yang X, Cushman JC

Publication type: Review

Publication status: Published

Journal: Current Opinion in Plant Biology

Year: 2016

Volume: 31

Pages: 118-124

Print publication date: 01/06/2016

Online publication date: 19/04/2016

Acceptance date: 01/01/1900

ISSN (print): 1369-5266

ISSN (electronic): 1879-0356


DOI: 10.1016/j.pbi.2016.04.001