Tese

Desiccation tolerance, development maturation and storage of seeds of several tropical tree species

Desiccation tolerance of mature seeds of Ceiba pentandra, Cedrela odorata, Dalbergia spruceana, Parkia igneiflora, Schizolobium amazonicum and Tabebuia alba was investigated. Seeds of all species tolerated desiccation to low moisture content (around 10% to 15% equilibrium relative humidity). Five di...

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Autor principal: Lima Junior, Manuel de Jesus Vieira
Grau: Tese
Idioma: eng
Publicado em: Inglaterra 2025
Assuntos:
Seed maturation
Seed storage behaviour
Seed development
Amazonia species
CIENCIAS AGRARIAS
Árvores - Semente - Amazônia
Sementes - Armazenamento
Acesso em linha: http://riu.ufam.edu.br/handle/prefix/8779
id oai:localhost:prefix-8779
recordtype dspace
spelling oai:localhost:prefix-87792025-03-14T19:11:47Z Desiccation tolerance, development maturation and storage of seeds of several tropical tree species Lima Junior, Manuel de Jesus Vieira Ellis, Richard H. N/A Murdoch, Alistair https://orcid.org/0000-0002-3695-6894 https://orcid.org/0000-0003-2147-665X Sementes da Amazônia - diversidade, ecologia e propagação r.h.ellis@reading.ac.uk Seed maturation Seed storage behaviour Seed development Amazonia species CIENCIAS AGRARIAS Árvores - Semente - Amazônia Sementes - Armazenamento Desiccation tolerance of mature seeds of Ceiba pentandra, Cedrela odorata, Dalbergia spruceana, Parkia igneiflora, Schizolobium amazonicum and Tabebuia alba was investigated. Seeds of all species tolerated desiccation to low moisture content (around 10% to 15% equilibrium relative humidity). Five different post harvest drying treatment to immature seeds of C odorata were imposed. In all treatments, ability to germinate after desiccation to 10% moisture content was no less than that of undried seeds extracted form fruits soon after collection. However, survival was affected by further desiccation to 3% moisture content. Seed longevity in air-dry storage was increased b some drying treatments. Drying in a thin layer for 10 to 20 days was the best treatment to improve desiccation tolerance and subsequent longevity. changes in hability of C pentandra seeds to survive desiccation and germinate, in subsequent seedling establishment and in the attainment of maximum potential longevity (Ki) were investigated during seed development and maturation. The onset of desiccation tolerance to 4% moisture content was abrupt and coincided with the onset of germinability, i.e. 5 days after mass maturity, and remained unchanged until the end of the shedding period. A similar pattern was observed for mean seedling dry weight. Maximum potential longevity was attained 19 days after mass maturity. Seed quality did not decline afterwards. Slow post-harvest drying was beneficial only for seeds which had achieved mass maturity. The viability equaton could be applied fro C. pentandra, C. odorata, T. alba and Dalbergia spruceana. Seeds of C. pentandra, S. parahyba var amazonicum, p. igneiflora and T. alba could also survive when sored dry at sub-zero temperature. C. pentandra, C. odorata and T. alba can thus be definitely classified as species with orthodox seed storage behaviour, while D. spruceana, S amazonicum and P. igneiflora are most likely to also show orthodox seed storage behaviour. 1 Sim 2025-03-14T19:09:50Z 2025-03-14T19:09:50Z 1999-10-12 Tese http://riu.ufam.edu.br/handle/prefix/8779 eng Acesso Aberto Inglaterra Faculty of Agriculture PhD in Agriculture Reading, UK
institution Repositório Institucional - Universidade Federal do Amazonas
collection RI-UFAM
language eng
topic Seed maturation
Seed storage behaviour
Seed development
Amazonia species
CIENCIAS AGRARIAS
Árvores - Semente - Amazônia
Sementes - Armazenamento
spellingShingle Seed maturation
Seed storage behaviour
Seed development
Amazonia species
CIENCIAS AGRARIAS
Árvores - Semente - Amazônia
Sementes - Armazenamento
Lima Junior, Manuel de Jesus Vieira
Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
topic_facet Seed maturation
Seed storage behaviour
Seed development
Amazonia species
CIENCIAS AGRARIAS
Árvores - Semente - Amazônia
Sementes - Armazenamento
description Desiccation tolerance of mature seeds of Ceiba pentandra, Cedrela odorata, Dalbergia spruceana, Parkia igneiflora, Schizolobium amazonicum and Tabebuia alba was investigated. Seeds of all species tolerated desiccation to low moisture content (around 10% to 15% equilibrium relative humidity). Five different post harvest drying treatment to immature seeds of C odorata were imposed. In all treatments, ability to germinate after desiccation to 10% moisture content was no less than that of undried seeds extracted form fruits soon after collection. However, survival was affected by further desiccation to 3% moisture content. Seed longevity in air-dry storage was increased b some drying treatments. Drying in a thin layer for 10 to 20 days was the best treatment to improve desiccation tolerance and subsequent longevity. changes in hability of C pentandra seeds to survive desiccation and germinate, in subsequent seedling establishment and in the attainment of maximum potential longevity (Ki) were investigated during seed development and maturation. The onset of desiccation tolerance to 4% moisture content was abrupt and coincided with the onset of germinability, i.e. 5 days after mass maturity, and remained unchanged until the end of the shedding period. A similar pattern was observed for mean seedling dry weight. Maximum potential longevity was attained 19 days after mass maturity. Seed quality did not decline afterwards. Slow post-harvest drying was beneficial only for seeds which had achieved mass maturity. The viability equaton could be applied fro C. pentandra, C. odorata, T. alba and Dalbergia spruceana. Seeds of C. pentandra, S. parahyba var amazonicum, p. igneiflora and T. alba could also survive when sored dry at sub-zero temperature. C. pentandra, C. odorata and T. alba can thus be definitely classified as species with orthodox seed storage behaviour, while D. spruceana, S amazonicum and P. igneiflora are most likely to also show orthodox seed storage behaviour.
author_additional Ellis, Richard H.
author_additionalStr Ellis, Richard H.
format Tese
author Lima Junior, Manuel de Jesus Vieira
title Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
title_short Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
title_full Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
title_fullStr Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
title_full_unstemmed Desiccation tolerance, development maturation and storage of seeds of several tropical tree species
title_sort desiccation tolerance, development maturation and storage of seeds of several tropical tree species
publisher Inglaterra
publishDate 2025
url http://riu.ufam.edu.br/handle/prefix/8779
_version_ 1831970280921104384
score 11.755432

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