Mixing 1-Naphthaleneacetic Acid and Pollen, Could it be Considered as an Alternative for Obtaining Normal Fruits within Artificial Pollination in the Hybrid Elaeis oleifera x Elaeis guineensis?
Assisted pollination is an agronomic practice that must be done in OxG hybrid cultivars to achieve adequate bunch formation close to 65% with high oil extraction rates between 18-21%. The requirement of assisted polli- nation is caused mainly by the low viability and germination potential of the hybrid’s pollen. Recent research developed by Cenipalma, using the plant growth regulator 1-Naphthaleneacetic acid (NAA), showed that it is possible to induce parthenocarpic (seedless) fruits without using pollen. NAA applications to female inflorescences lead to better physical composition of the bunches and higher oil yields. One of the forms to apply the growth regulator is as a powder basis in a mixture with pollen, to produce some normal fruits to improve the pressing process in the mill and oil palm kernel recovery. However, there is not enough research about the benefits of this practice (mixture pollen + NAA), taking into account that NAA could impact pollen behavior. The objective of this research was to evaluate the impact of NAA on pollen viability and germinability. This evaluation is the first step to determine the benefits of using pollen + NAA as a commercial practice in the OxG interspecific hybrids. The results showed that NAA negatively affected pollen germinability, causing a 90% reduction in the germi- nation rate in less than 30 minutes of physical NAA and pollen contact. Pollen viability was also influenced by NAA, although not in the same magnitude as germinability. Thus, NAA caused a reduction of 22 percentage points in pollen viability at 20 minutes of physical contact between the plant growth regulator and the pollen. Regarding the number of normal fruits that are formed by the application of the mixture pollen + ANA, it was almost a third of what occurs when only pollen is used, corroborating the results observed in the laboratory. In conclusion, the physical mixture of pollen with ANA is not recommended in OxG interspecific hybrids, consid- ering the reduction of pollen germination and therefore the production of normal fruits (with kernel).
| Main Authors: | , , , |
|---|---|
| Format: | info:eu-repo/semantics/article biblioteca |
| Language: | spa |
| Published: |
Fedepalma
2020-08-22T11:20:22Z
|
| Subjects: | Germinability, viability, physical composition of the bunches, OxG hybrid, germinabilidad, viabilidad, composición física del racimo, híbrido OxG, |
| Online Access: | https://publicaciones.fedepalma.org/index.php/palmas/article/view/13166 http://repositorio.fedepalma.org/handle/123456789/141023 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Assisted pollination is an agronomic practice that must be done in OxG hybrid cultivars to achieve adequate bunch formation close to 65% with high oil extraction rates between 18-21%. The requirement of assisted polli- nation is caused mainly by the low viability and germination potential of the hybrid’s pollen. Recent research developed by Cenipalma, using the plant growth regulator 1-Naphthaleneacetic acid (NAA), showed that it is possible to induce parthenocarpic (seedless) fruits without using pollen. NAA applications to female inflorescences lead to better physical composition of the bunches and higher oil yields. One of the forms to apply the growth regulator is as a powder basis in a mixture with pollen, to produce some normal fruits to improve the pressing process in the mill and oil palm kernel recovery. However, there is not enough research about the benefits of this practice (mixture pollen + NAA), taking into account that NAA could impact pollen behavior. The objective of this research was to evaluate the impact of NAA on pollen viability and germinability. This evaluation is the first step to determine the benefits of using pollen + NAA as a commercial practice in the OxG interspecific hybrids. The results showed that NAA negatively affected pollen germinability, causing a 90% reduction in the germi- nation rate in less than 30 minutes of physical NAA and pollen contact. Pollen viability was also influenced by NAA, although not in the same magnitude as germinability. Thus, NAA caused a reduction of 22 percentage points in pollen viability at 20 minutes of physical contact between the plant growth regulator and the pollen. Regarding the number of normal fruits that are formed by the application of the mixture pollen + ANA, it was almost a third of what occurs when only pollen is used, corroborating the results observed in the laboratory. In conclusion, the physical mixture of pollen with ANA is not recommended in OxG interspecific hybrids, consid- ering the reduction of pollen germination and therefore the production of normal fruits (with kernel). |
|---|