Figure 4.

Leaf chemical composition of young, expanding (red bars, except for chlorophyll) and fully mature (>1 year old; green bars, except for chlorophyll) leaves of six Proteaceae species growing in their natural habitat and in Arabidopsis thaliana grown in a growth room at a range of day lengths, as indicated along the x-axis. Values are means ± SE (2 ≤ n ≤ 6). Leaves of the Proteaceae species were harvested during mid-morning; those of A. thaliana at the end of the day; those of A. thaliana at the end of the day. (a) Chlorophyll a and chlorophyll b concentrations; (b) starch concentrations (expressed as glucose equivalents); (c) Glc6P concentrations; (d) amino acid concentrations.