Table 1. Cell- specific functions of proteins identified in single cellular layers of tomato rootsa.

Protein accessionb	Protein scorec	Protein matchesd	Protein coverage	Protein name	Tissue typee Al-Ep Ct-Ep Al-Ctx Ct-Ctx
Epidermal cell-expressed proteins
solyc07g062480.1.1	205	6	17.5	Curculin-like	vf	v	v	v
solyc08g014000.2.1	144	5	8.5	Lipoxygenase	v
solyc04g054980.2.1	162	7	30.3	Lipoxygenase	v
solyc03g093360.2.1	162	8	18.4	Lipoxygenase	v
solyc08g029000.2.1	54	1	1.5	Lipoxygenase	v
solyc01g099180.2.1	44	2	2.2	Lipoxygenase	v
solyc08g014000.2.1	144	5	8.5	Lipoxygenase	v
solyc04g054980.2.1	162	7	30.3	Lipoxygenase		v
solyc01g099190.2.1	44	1	1.5	Lipoxygenase		v
Root hair-related proteins
solyc02g065740.2.1	90	3	5.6	Alpha-1 4-glucan-protein synthase	v
solyc07g063550.2.1	34	1	1.7	Arf-GAP	v	v
solyc09g010520.2.1	32	1	1.9	ADP-ribosylation factor	v
solyc10g080100.1.1	97	4	4.1	Villin-3	v
solyc12g008590.1.1	103	6	50	Profilin	v
solyc09g092380.2.1	418	20	26.2	MEE58	v	v
solyc01g103010.2.1	40	1	1.8	Cullin-associated protein 2	v
solyc03g114860.2.1	104	4	8.5	Alpha-1 4-glucan-protein synthase	v
solyc03g019750.2.1	27	1	2.9	Alpha-1 4-glucan-protein synthase	v
solyc02g065740.2.1	90	3	5.6	Alpha-1 4-glucan-protein synthase	v
solyc07g065540.1.1	40	1	4.4	Fasciclin-like arabinogalactan protein 10	v
solyc08g008250.1.1	54	1	6	DEFORMED ROOTS AND LEAVES 1 (transcription factor)	v
solyc08g074520.1.1	25	1	5.3	ROOT GROWTH DEFECTIVE 3		v
Cortex-specific proteins
solyc09g083020.1.1	69	1	9.6	Myrosinase-binding protein-like protein			v
Al-response proteins
solyc09g082780.2.1	37	1	4.4	Wali7	v	v	v
Oxidative stress
solyc01g079820.2.1	34	1	6.3	Peroxiredoxin IIF	v
solyc02g078360.2.1	45	1	5.4	Thioredoxin	v		v
solyc09g009390.2.1	112	3	10.6	Monodehydroascorbate reductase	v		v
solyc10g082030.1.1	72	3	11.6	2-Cysteine peroxiredoxin B	v		v
solyc09g007270.2.1	179	5	24	Ascorbate peroxidase 2	v	v	v
solyc06g049080.2.1	69	2	6.6	Manganese superoxide dismutase 1	v	v	v
solyc01g106450.2.1	67	3	10.6	L-galactose dehydrogenase	v	v
solyc04g080850.2.1	35	1	8.9	Cytochrome b5	v	v
solyc06g005150.2.1	307	11	26	Ascorbate peroxidase 1	v	v
solyc07g020860.2.1	52	2	6.8	Thioredoxin-dependent peroxidase 1	v	v
solyc12g094620.1.1	245	9	22.2	Catalase 2	v	v	v	v

^aThe functions of the proteins were identified by searching in tomato²⁰ and iRootHair²⁴ databases.

^bUnigenes accession number in annotated tomato database iTAG2.4.

^cProtein score, which are derived from the some of the peptide scores using multidimensional protein identification technology (MUDPIT) scoring.

^dPeptide numbers matching the protein.

^eSingle cellular layers in tomato roots.

^fProtein identified in the respective tissue.