Table I.
Frequency of plasmodesmata in minor veins of apple and P. major
Data were acquired from images of transverse sections representing a total of seven veins in each species. When plasmodesmata were branched, each branch was counted as an individual channel, provided it extended at least halfway to the median cavity. The approximate section thickness for calculating plasmodesmatal frequencies was 70 nm. n/d, Interface not detected.
| Interface | Plasmodesmatal Channels
|
|
|---|---|---|
| Apple | P. major | |
| μm−2 | ||
| BS:PP | 11 | 2.0 |
| BS:CC | 0.6 | 2.4 |
| BS:BS | 7.5 | n/d |
| PP:PP | 8.5 | 1.8 |
| PP:CC | 7.0 | 1.6 |
| PP:SE | n/d | 0.8 |
| CC:CC | 3.6 | n/d |
| CC:SE | 6.0 | 2.7 |
| BS:SE | n/d | n/d |