Table 1.
Estimates of pollen tube dimensions for Betula
| Species | W (µm) | C (µm) | C cp (µm) | W A (µm2) | T A (µm2) |
|---|---|---|---|---|---|
| B. occidentalis (2x) | 0.2086 | 17.42 | 21.57 | 3.63 | 22.33 |
| {0.2003, 0.2173} | {16.72, 18.14} | {3.42, 3.84} | {20.53, 24.29} | ||
| B. papyrifera (6x) | 0.2085 | 19.60 | 23.91 | 4.10 | 28.53 |
| {0.1986, 0.2189} | {18.66, 20.59} | {3.83, 4.40} | {25.79, 31.56} | ||
| Model R2adj. | 0.25 | 0.58 | 0.47 | 0.52 | |
| P = 0.9867 | P = 0.0016 | P = 0.0122 | P = 0.0015 |
Wall thickness, W, circumference, C, wall area, WA, and tube area, TA, were each measured on the same pollen tubes. Circumference of callose plugs, Cp, is shown for comparison. Values are back-transformed, least-squares means with 95 % confidence intervals in curly brackets.