Table I.
Summary of frequency of plasmodesmata between various cell types in vascular bundles in sink leaf blades of barley
| Interface | A
|
B
|
||||||
|---|---|---|---|---|---|---|---|---|
| No. of PDa | %b | Wall Interfacec | Frequencyd | No. of PDa | %b | Wall Interfacec | Frequencyd | |
| TST-TST | 6 | 0.5 | 22.6 | 0.3 | 0 | 0.00 | 9.1 | 0.0 |
| TST-TCC | 41 | 3.7 | 74.1 | 0.6 | 26 | 3.4 | 20.0 | 1.3 |
| TCC-VP | 67 | 6.0 | 137.5 | 0.5 | 31 | 4.0 | 42.4 | 0.7 |
| TST-VP | 21 | 1.9 | 115.7 | 0.2 | 10 | 1.3 | 64.7 | 0.2 |
| ST-ST | 0 | 0.0 | 94.6 | 0.0 | 4 | 0.5 | 61.2 | 0.1 |
| ST-CC | 79 | 7.0 | 317.5 | 0.2 | 70 | 9.0 | 194.9 | 0.4 |
| ST-VP | 8 | 0.7 | 267.2 | 0.0 | 2 | 0.3 | 118.7 | 0.0 |
| ST-MS | 4 | 0.4 | 11.4 | 0.4 | 0 | 0.0 | 23.3 | 0.0 |
| CC-CC | 9 | 0.8 | 29.5 | 0.3 | 2 | 0.3 | 47.6 | 0.0 |
| CC-VP | 84 | 7.5 | 264.0 | 0.3 | 44 | 5.7 | 185.5 | 0.2 |
| CC-MS | 28 | 2.5 | 24.0 | 1.2 | 6 | 0.8 | 19.2 | 0.3 |
| VP-VP | 362 | 32.3 | 766.1 | 0.5 | 228 | 29.5 | 405.5 | 0.6 |
| VP-MS | 254 | 22.7 | 614.9 | 0.4 | 170 | 22.0 | 382.1 | 0.4 |
| MS-MS | 43 | 3.8 | 171.8 | 0.3 | 38 | 4.9 | 132.1 | 0.3 |
| MS-BS | 91 | 8.1 | 456.0 | 0.2 | 92 | 11.9 | 255.3 | 0.4 |
| BS-BS | 24 | 2.1 | 83.0 | 0.3 | 50 | 6.4 | 36.0 | 1.4 |
Data are for two leaves of 5 cm in length (A) and 1.2 cm in length (B), respectively. CC, Companion cell connected to a thin-walled sieve tube; MS, mestome sheath cell; ST, thin-walled sieve tube; TCC, companion cell connected to a thick-walled sieve tube; TST, thick-walled sieve tube; VP, vascular parenchyma cell.
a
Total number of plasmodesmata counted.
b
Percentage of total number of plasmodesmata counted.
c
Total length of shared cell wall interface in micrometers.
d
Frequency, number of plasmodesmata per micrometers shared cell wall interface.