Akademik Veri Yönetim Sistemi
Rendiconti Lincei, cilt.36, sa.3, ss.841-861, 2025 (SCI-Expanded)
Polyamines (PAs), putrescine, spermidine, and spermine are aliphatic compounds found in all living cells, with being the most common in higher plants. They play a significant role in plant growth regulation and stress-related responses. The effects of PAs on numerous plant species have been tested under in vitro conditions. Despite their promising results, research on the impacts of PAs on in vitro culture of orchid species is limited. Plant tissue culture techniques offer sustainable propagation systems for such plant species that have economic value and need conservation measures since their populations are threatened. As a result, the purpose of this review is to emphasize the impact of PAs on modifying several biologic parameters in orchids, to highlight their in vitro use for orchid species’ conservation and sustainable production, and to identify the major gaps in the literature regarding PAs’ role in in vitro orchid propagation. The available efforts in the literature have been summarized and classified according to orchid genera studied, their life forms and major life zones, and starting explants in cultures. The major gaps we found in the related literature are the absence of tuberous geophytic orchid species as research plants in in vitro studies testing PAs’ effects, not yet testing the effects of cadaverine and thermospermine as PAs in orchid cultures, the wide range in PAs’ working concentrations, and the limited use of thin cell layer explants as promising explants and seeds when testing PAs’ effects on orchids. Therefore, it would be useful to plan future studies to fill these gaps in the literature.