Details

Autor(en) / Beteiligte

• Kong, Eveline Y.Y.
• Biddle, Julianne
• Foale, Mike
• Panis, Bart
• Adkins, Stephen W.

Titel

The potential to propagate coconut clones through direct shoot organogenesis: A review

Ist Teil von

• Scientia horticulturae, 2021-11, Vol.289, p.110400, Article 110400

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• •About 50% of coconut palms around the globe are senile (old) and need replanting.•Direct shoot organogenesis has the potential to be the preferred pathway to propagate coconut in vitro.•Thidiazuron could play a crucial role to induce direct shoot organogenesis in coconut.•Development of direct shoot organogenesis in palm species provides insights for coconut.•The response in coconut may be genotype-dependent as inferred for date palm. The production of a single stem, which is a characteristic of most members of the Arecaceae family, is a distinctive feature of the coconut palm (Cocos nucifera L.), oil palm (Elaeis guineensis Jacq.) and date palm (Phoenix dactylifera L.). This feature has been a constant for many palm species since the late Cretaceous period, but rare cases of shoot branching in coconut do occur. This original feature leads to multiple stem formation and is considered to be a novel trait. An understanding of the role of plant growth regulators in shoot branching offers a new pathway to produce multiple stem buds in a palm through in vitro culture. As the world's coconut crop is now facing a decline in productivity due to palm aging, extreme climate events, and biotic and abiotic stresses, this approach could help to meet the increasing demand for elite coconut seedlings. Hence, this review examines the potential for direct shoot organogenesis to be used as an option for the clonal propagation of coconut. Cytokinins are essential to induce direct shoot formation. Although more research is needed to confirm the best method to produce coconut clones, based on the literature, for direct shoot organogenesis, it is expected that a treatment of thidiazuron only (for embryo) or in combination with picloram (for immature inflorescence) in Eeuwens Y3 medium would produce the best likelihood of success. The feasibility of this pathway of plantlet production in coconut is bolstered by the relatively easy direct shoot organogenesis now available as an alternative clonal propagation protocol for oil palm and date palm.