Seed Maturity and Its In Vitro Initiation of Chilean Endemic Geophyte Alstroemeria pelegrina L.

Francesca Guerra, Patricia Peñaloza, Alexis Vidal, Ricardo Cautín, Mónica Castro

Research output: Contribution to journalArticlepeer-review

Abstract

Alstroemeria pelegrina (A. pelegrina), a Chilean endemic, is considered vulnerable as its natural habitat is currently threatened. The decline in the reproductive capacity of the species due to anthropogenic impacts and climate change has made it imperative to address the problem by developing large-scale propagation methods. The objective of this study was to establish protocols for breaking the dormancy and in vitro germination of A. pelegrina seeds to speed up the germination and seedling production processes. The research began with morphological observations of the reproductive process, followed by in vitro sowing. The results showed that the seeds reached full maturity in 51 days, and physiological maturity in 41 days, at which point the seeds could be harvested for in vitro germination. The mechanical scarification pretreatment improves the in vitro germination rate to 96% and the germination time to 7 days, showing that the species is characterized by physical seed dormancy. On the other hand, if the seed coat incisions are deeper than 0.5 mm, 30% of the potential plants are lost due to embryo damage. The study provides scientific evidence for the feasibility of large-scale in vitro propagation of the species and establishes an efficient method of seedling production.

Original languageEnglish
Article number464
JournalHorticulturae
Volume8
Issue number5
DOIs
StatePublished - May 2022
Externally publishedYes

Keywords

  • Alstroemeriaceae
  • conservation of native flora
  • in vitro establishment
  • Los Molles butterfly
  • physical dormancy
  • physiological seed maturity
  • scarification

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