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Polibotánica

versão impressa ISSN 1405-2768

Resumo

ORANTES-GARCIA, C. et al. Morphology and germination of Chamaedorea glaucifolia (Arecaceae), endangered and endemic species of Mexico. Polibotánica [online]. 2019, n.47, pp.77-87. ISSN 1405-2768.  http://dx.doi.org/10.18387/polibotanica.47.6.

Chamaedorea glaucifolia H. Wendl is a species of the family Arecaceae, considered endemic to the southeast of Mexico and classified in danger according to the Nom-059-Semarnat-2010, given the ornamental importance of this palm and the lack of studies focused on its germination , storage and morphometry, the present work had as objective to determine the morphometric characteristics of the infructescence, fruit and seed, as well as to study the germinative process and the effect of storage on the viability and germinative capacity. To 100 fruits and seeds taken at random were individually determined weight, length and diameter, for the effect of the storage period (30, 60, 90 and 120 days), viability was assessed by tetrazolium test and germination with seed sowing, in a completely random experimental design with four replicates of 25 seeds each, making a total of 100 seeds per treatment. On average the infructescences contain 1 113.75 fruits (N = 5). The fruit presented 0.85 ± 0.52 cm (N = 100) in length, 0.70 ± 0.35 cm (N = 100) in diameter and 0.25 ± 0.028 g (N = 100) in weight. Each fruit contains a globose seed with a length of 0.62 ± 0.21 cm (N = 100), a diameter of 0.52 ± 0.28 cm (N = 100) and 0.11 ± 0.025 g (N = 100) weight, one kilogram contains on average 8 500 seeds. The seeds presented 100% viability at 30 days of storage, this drops to 65% at 120 days, the germination capacity of the seeds is also affected by the storage period. Germination is hypogeal, the radicle in seeds with 120 days of storage, begins to emerge at 49 days after sowing (das). Studies on morphometry, viability and germination allow obtaining fundamental information for the propagation of endangered species such as C. glaucifolia, which urgently needs conservation and management strategies to reduce the impact on wild populations.

Palavras-chave : Propagation; storage; viability; palms; Chiapas.

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