Table 1.
Tissue Tropism of Wild-Type and Hybrid Geminiviruses
| Cells Infecteda
|
|||||
|---|---|---|---|---|---|
| Viral Genotype | V | M | T | M/T % | χ2 |
| BGMV-based hybrid viruses | |||||
| Elements from TGMV | |||||
| None (wild-type BGMV) | 314 | 3 | 317 | 0.95 | a |
| AL23 | 308 | 4 | 312 | 1.28 | a |
| BL1/BR1 | 84 | 0 | 84 | 0.00 | a, b |
| BRi | 234 | 4 | 238 | 1.68 | a, b |
| AL23, BL1/BR1 | 395 | 18 | 413 | 4.36 | b |
| AL23, BRi | 383 | 387 | 770 | 50.26 | c |
| BRi, BL1/BR1 | 322 | 275 | 597 | 46.06 | c, d |
| AL23, BRi, BL1/BR1 | 293 | 307 | 600 | 51.17 | c |
| TGMV-based hybrid viruses | |||||
| Elements from BGMV | |||||
| None (wild-type TGMV) | 279 | 644 | 923 | 69.77 | e |
| AL23 | 458 | 327 | 785 | 41.66 | d |
| BL1/BR1 | 403 | 294 | 697 | 42.18 | d |
| BRi | 227 | 11 | 238 | 4.62 | b, f |
| AL23, BL1/BR1 | 135 | 2 | 137 | 1.46 | a, b |
| AL23, BRi | 130 | 1 | 131 | 0.76 | a |
| BRi, BL1/BR1 | 172 | 2 | 174 | 1.15 | a |
| AL23, BRi, BL1/BR1 | 233 | 2 | 235 | 0.85 | a |
a
Infected cells that could be unambiguously identified as vascular associated (V) or mesophyll (M) were scored. The total number (T) of infected cells (where T = V + M) and the percentage of the total that were mesophyll cells (M/T %) are also given. Mesophyll invasion efficiencies that were not significantly different (P > 0.05 by χ2 test) are indicated by like letters under χ2.