1. Polyembryony in Santalum album– a double-edged sword for plant regeneration
- Author
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Dhyani, Anurag, Abinlal, Kavungulla Chalil, Bindu, Syamala, Anilkumar, Chandran, Joshi, Geeta, and Phartyal, Shyam S.
- Abstract
ABSTRACTSantalum albumis a hemiparasitic evergreen tree known for its heartwood oil, widely used in the cosmetics and aromatherapy industry. Overexploitation in the past few decades has led to the classification of this species as Vulnerable on the IUCN Red List of Threatened Species. Drupes of S. album are single-seeded and usually monoembryonic in nature, producing normal seedlings. However, in a previous study, we also observed some polyembryonic seeds. In this news article we share our polyembryony findings from Marayoor population as well as the growth and survival of seedlings which emerged from polyembryonic seeds. We found that less than 1% of the seeds in Marayoor population exhibited polyembryony (duplets). The general trend was that one radicle emerged 2-3 days earlier than the other and grew faster and healthier compared to the radicle from monoembryonic seeds. The second (smaller) seedling from polyembryonic seeds began to degenerate if not separated, but it survived well (albeit with low growth potential) once transplanted into a separate polybag. In S. album, polyembryony does not seems to be an essential ecological competitive strategy, unlike in several invasive species. For mass-scale seedling production of this vulnerable species, we recommend separating twin seedlings soon after their emergence for a better survival rate.
- Published
- 2024
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