Table 3.
Pollen tube growth and fertilization levels in Sikitita flowers in response to different pollination treatments. Seasons 2022 and 2023. Average ± standard error of pollen tube growth measured 2, 4, and 8 days after pollination. Fertilization values compared by chi square tests.
| Pollination Treatments | Season 2022 | Season 2023 | ||
|---|---|---|---|---|
| Pollen Tube Growth * | Fertilization ** | Pollen Tube Growth * | Fertilization ** | |
| Self-pollination | 0.07 ± 0.04 | 0.0 c *** | 0.15 ± 0.06 | 12.7 c |
| Open-pollination | 1.12 ± 0.16 | 16.9 ab | 1.50 ± 0.19 | 31.4 b |
| ×Arbequina | 0.42 ± 0.16 | 10.0 b | 0.13 ± 0.06 | 16.4 bc |
| ×Arbosana | 1.76 ± 0.19 | 28.8 a | 2.20 ± 0.15 | 60.0 a |
| ×Koroneiki | – | – | 0.25 ± 0.07 | 15.4 bc |
* Pollen tube growth measured in a scale from 0 (absence of pollen tubes growing in the upper part of the style) to 3 (more than 25 pollen tube present in the upper part of the style) (see Figure 4). ** Percentage of flowers with a pollen tube in the micropyle of at least one of the four ovules. *** In the columns of fertilization, means followed by different letters are significantly different at p ≤ 0.05.