Table I.
Plasmodesmal densities (PDD) and frequencies (PDF) between different cells in phloem of the major and minor sepal bundles of developing apple fruit during the early, middle, and late developmental stages
| Stages | Bundles | SE/CC
|
SE/PC
|
CC/PC
|
PC/PC
|
||||
|---|---|---|---|---|---|---|---|---|---|
| PDD | PDD | PDD | PDD | ||||||
| Early | Major | 2.96 | 2.00 | 0.05 | 0.05 | 0.05 | 0.05 | 2.98 | 3.00 |
| Minor | 3.00 | 2.50 | 0.00 | 0.00 | 0.00 | 0.00 | 2.88 | 2.35 | |
| Middle | Major | 2.90 | 2.05 | 0.03 | 0.02 | 0.03 | 0.02 | 2.95 | 3.00 |
| Minor | 2.96 | 2.53 | 0.00 | 0.00 | 0.00 | 0.00 | 2.90 | 2.40 | |
| Late | Major | 3.00 | 2.30 | 0.00 | 0.00 | 0.00 | 0.00 | 3.00 | 2.95 |
| Minor | 3.00 | 2.45 | 0.00 | 0.00 | 0.00 | 0.00 | 2.90 | 2.95 | |
SE, sieve element; CC, companion cell; PC, parenchyma cells. Unit of PDD and PDF, number of plasmodesmata μm−2.