Vol. 168: 74–93, 2015
Ishihara H., Obata T., Sulpice R., Fernie A.R., and Stitt M. Quantifying Protein Synthesis and Degradation in Arabidopsis by Dynamic 13CO2 Labeling and Analysis of Enrichment in Individual Amino Acids in Their Free Pools and in Protein.
In the “Discussion,” the sentence “However, they do not provide a quantitative explanation for the growth inhibition; indeed, the increase in respiration accounts for only a small proportion of the assimilated C.” should be corrected to “However, they do not provide a quantitative explanation for the growth inhibition in short photoperiods (but for long photoperiods, see Brauner et al., 2014).”
In short photoperiods, phosphoglucomutase become severely carbon starved at night, leading to large-scale changes in gene expression and an inhibition of growth in the night. The inhibition of growth is smaller in long photoperiods. Brauner et al. (2014) show that root respiration is increased in phosphoglucomutase in long photoperiods. By modeling the whole-plant carbon balance, they show that this increase in root respiration largely accounts for the inhibition of growth in long photoperiods.
We thank Katrin Brauner for drawing our attention to the role of root respiration in long photoperiods.