Table 1. Cell-to-cell movement of TSWV NSm in leaf epidermis of Nicotiana benthamiana after bombardment.

Bombarded plasmid	Protein size (kDa)	Total no. of signal clusters	No. of clusters with 1 cell (% of total)	No. of clusters with ≥2 cells (% of total)	P-value b
GFP-GFP	54.0	53	53 (100%) a	0
NSm-GFP	60.9	110	52 (47.3%)	58 (52.7%)	< 0.001
NSm 133-135D -GFP	60.9	84	84 (100%)	0
NSm 177-179D -GFP	60.9	92	92 (100%)	0
NSm 4A/5A -GFP	60.9	106	106 (100%)	0
NSm 230A/232A -GFP	60.9	98	98 (100%)	0

^a Signal clusters comprise fluorescent cells, indicating presence of GFP fusion protein.

^b P-values were calculated using unpaired two-tailed Student t-test.