Please use this identifier to cite or link to this item:
Title: Degree of seed desiccation sensitivity of the amazonian palm oenocarpus bacaba depends on the criterion for germination [O grau de sensibilidade ao dessecamento das sementes da palmeira amazônica oenocarpus bacaba depende do critério de germinação]
Authors: Bastos, Lydiane Lucia De Sousa
Calvi, Geângelo Petene
Lima Júnior, Manuel de Jesus Vieira
Ferraz, Isolde Dorothea Kossmann
Issue Date: 2021
metadata.dc.publisher.journal: Acta Amazonica
metadata.dc.relation.ispartof: Volume 51, Número 2, Pags. 85-90
Abstract: Across the seed-seedling transition, several germination criteria are used in studies of palm-seed germination. In Oenocarpus bataua, these criteria have differential tolerance to thermal stress. In this study, we evaluated the tolerance of germination criteria to seed desiccation of the congeneric Oenocarpus bacaba. We dried seeds to different moisture contents (MC) before scoring first cataphyll, second cataphyll, enclosed eophyll and expanded eophyll. Seeds without drying had 41.7% MC. Germination success reached close to 70% after 75 and 105 days, depending on the germination criterion. Safe MC was close to initial MC and all seeds were dead with MC < 26.7%. As the primordial organs of the cataphylls and the eophyll are already detectable in the palm-seed embryo, all were affected by drying. Critical MC, defined here as 50% loss of germination capacity, increased from 35.4% (first cataphyll) to 37.1% (expanded eophyll) and confirmed that, across the seed-seedling transition, more advanced germination stages had a higher sensitivity to desiccation. During germination and development, the criteria appear in sequence over several weeks. Consequently, the desiccation damage was only detectable when the last criterion was evaluated. To avoid an underestimation of damages, we suggest that seed-stress studies in palms should take into account an adequate period for seedling development, which, for O. bacaba, was 105 days until the expansion of the eophyll. © 2021, Instituto Nacional de Pesquisas da Amazonia. All rights reserved.
metadata.dc.identifier.doi: 10.1590/1809-4392202001951
Appears in Collections:Artigos

Files in This Item:
File SizeFormat 
degree of seed.pdf723,88 kBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons