Table 1. Proteins identified by MALDI-TOF/TOF-MS in watermelon ‘Sambok Honey’ as the scion and bottle gourd ‘RS Dongjanggun’ as rootstock.

Spot No.	NCBI accession number	Protein Name	Biological function	Plant Species	Mr Value	Calculated pI/Exp pI	MASCOT Score	Sequence coverage (%)
1	F4IJ86	Homeobox-leucine zipper protein ATHB-7	Transcriptional regulation	Arabidopsis thaliana	30421	5.52/4.6	47	20
2	A9PK54	Transcription elongation factor SPT4 homolog	Transcriptional regulation	Populus trichocarpa	13606	5.66/4.0	44	56
3	M0UZT2	Beta-galactosidase	Carbohydrate metabolism	Hordeum vulgare	81149	5.66/4.0	42	50
4	-	-	-	-	-	-	-	-
5	V4KH47	ATP-dependent Clp protease proteolytic subunit	Amino acid biosynthesis	Eutrema salsugineum	42995	8.85/4.0	64	41
6	E1ZEF2	Cysteine synthase	Amino acid biosynthesis	Chlorella variabilis	36901	8.79/4.0	52	39
7	O48573	Disease resistance protein-	Defense response	Arabidopsis thaliana	135194	5.75/4.0	66	14
8	D8RG99	Inner arm dynein 3–2	Microtubule based movement	Selaginella moellendorffii	368702	5.44/5.44	67	11
9	-	-	-	-	-	-	-	-
10	V4K6A2	Uncharacterized protein	-	Eutrema salsugineum	77378	5.1/5.4	77	24
11	Q00YY4	Putative DAK2 domain containing protein	Ion binding	Ostreococcus tauri	88997	6.69/6.6	83	18
12	D8R7J6	Putative uncharacterized protein	-	Selaginella moellendorffii	99451	8.72/5.5	77	21
13	D8RG99	Inner arm dynein 3–2	Microtubule based movement	Selaginella moellendorffii	368702	5.44/5.6	70	9
14	A2YMB7	Beta-amylase	Carbohydrate metabolism	Oryza sativa	55464	5.3/5.7	59	34
15	E0CSS7	Putative uncharacterized protein	-	Vitis vinifera	135140	8.57/6.0	70	14
16	D7KEC0	Galactosyltransferase family protein	Protein glycosylation	Arabidopsis thaliana	46825	5.9/5.4	61	55
17	Q2A9U7	RNA recognition motif	Nucleotide binding	Brassica oleracea	45703	6.5/6.2	54	28
18	Q84K89	Receptor kinase LRK10	ATP binding	Avena sativa	72721	7.1/6.4	59	21
19	L7PBV6	Maturase K	RNA binding	Derris submontana	61607	9.26/7.0	58	20
20	G7J106	50S ribosomal protein L2	RNA binding	Medicago truncatula	15106	11.6/7.0	56	49
21	R4L8I2	Alanine-glyoxylate aminotransferase	Pyridoxal phosphate binding	Peperomia prostrata	31935	9.7/7.0	56	20
22	R4L8I2	Alanine-glyoxylate aminotransferase	Pyridoxal phosphate binding	Peperomia prostrata	31935	9.7/7.1	56	20
23	M5X1H0	ATP-dependent Clp protease proteolytic subunit	Amino acid biosynthesis	Prunus persica	32028	5.9/7.0	45	42
24	K4CH47	Uncharacterized protein	-	Solanum lycopersicum	10546	10.0/7.0	57	70