Table I. Partial list of phosphorylation sites significantly affected by changing plant water statuses.

^a Refers to UniProtKB Identifier retrieved from sequence similarity searches using the UniProt BLAST tool (http://www.uniprot.org/).

^b Multiple sites of phosphorylation are separated by a coma while ambiguous sites are separated by /. All phosphorylation sites reported here were confirmed by manual inspection of the raw data to verify the phosphorylation site assignment obtained using X! Tandem.

^c Refers to the p values obtained from the one-way ANOVA, “p/a” refers to qualitative changes.

^d Refers to the fold change computed between the light to heavy ratio measured during MWD and the light to heavy ratio measured during CTRL₁. Decreasing trends in phosphopeptide abundance are highlighted in green while increasing trends in phosphopeptide abundance are highlighted in red.

^e Refers to the fold change computed between the light to heavy ratio measured during SWD and the light to heavy ratio measured during CTRL₂. Decreasing trends in phosphopeptide abundance are highlighted in green whereas increasing trends in phosphopeptide abundance are highlighted in red.

^f “> 50%” indicates that the ratio between quantitative changes relative to control plants detected on mild water deficit (MWD) and those detected on sever water deficit (SWD) reached more than 0.5.

^g Refers to time points of the rehydration kinetics which displayed a >50% recovery compared to the variation of phosphopeptide abundances detected during SWD. “*” indicates when the linear regression of phosphopeptide abundances vs. duration of the rewatering events, was significant (p value < 0.05).

^h Kendall τ coefficient refers to the correlation between relative abundance of phosphorylation site and midday leaf water potential. Only significant Kendall τ coefficients are showed (p value < 0.02). Plots are shown in supplemental Fig. S3.

ⁱ Refers to the cluster number shown in Fig. 5 and in supplemental Fig. S2.

^j Refers to the fold change computed between the light to heavy ratio measured during SWD and the light to heavy ratio measured during CTRL₂ at the protein level. Information is provided for each reliably quantified protein, “ns” indicates that no significant change was detected. SWD-induced decreases in protein abundance are highlighted in green while SWD-induced increases in protein abundance are highlighted in red.

^k Refers to the fold change computed between the light to heavy ratio measured during RH₆₀ and the light to heavy ratio measured during SWD at the protein level. Information is provided for each reliably quantified protein, “ns” indicates that no significant change was detected. RH₆₀-induced decreases in protein abundance are highlighted in green while RH₆₀-induced increases in protein abundance are highlighted in red.