Table 2.
Stomata length and DNA content of diploid and putative triploid (*) Q. petraea and Q. robur trees
| Species | Tree no. | Stomata length (μm) |
Nuclear DNA content (pg, mean ± SD) |
Ploidy level | ||
|---|---|---|---|---|---|---|
| Range | Mean (s.e.) | 2C | 1Cx | |||
| Q. robur | 89 | 21·22–32·11 | 26·67 (0·353) | 1·62 ± 0·02 | 0·81 ± 0·01 | 2x |
| 356 | 21·96–33·91 | 28·77 (0·343) | 1·59 ± 0·01 | 0·79 ± 0·01 | 2x | |
| 275* | 23·73–40·00 | 30·58 (0·325)a | 2·44 ± 0·02 | 0·81 ± 0·01 | 3x | |
| Q. petraea | 187 | 22·11–31·91 | 26·23 (0·407) | 1·64 ± 0·02 | 0·82 ± 0·01 | 2x |
| 220 | 20·80–29·46 | 25·49 (0·166) | 1·62 ± 0·03 | 0·81 ± 0·01 | 2x | |
| 354* | 22·13–38·85 | 30·36 (0·189)b | 2·45 ± 0·03 | 0·82 ± 0·01 | 3x | |
a,bValues significantly different compared with diploid trees at α < 0·05 (Tukey's test).