Artigo

Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central

Himatanthus sucuuba is a tree species with known phytotherapic value which colonizes both white-water floodplains (várzea) and upland forests (terra firme) in Central Amazonian. The objective of this study was to compare germination and initial seedling development from seeds collected in both the e...

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Autor principal: Ferreira, Cristiane
Outros Autores: Piedade, Maria Teresa Fernandez, Parolin, Pia, Barbosa, Keillah Mara
Grau: Artigo
Idioma: pt_BR
Publicado em: Acta Botanica Brasilica 2020
Assuntos:
Anoxia
Hypoxia
Hydrochoric Dispersal
Seedlings Establishment
Anoxia
Hipoxia
Dispersão Hidrocórica
Estabelecimento De Plântulas
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/13136
id oai:repositorio:1-13136
recordtype dspace
spelling oai:repositorio:1-13136 Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central Tolerance of Himatanthus sucuuba Wood. (Apocynaceae) to the flooding regime in the Central Amazonian Ferreira, Cristiane Piedade, Maria Teresa Fernandez Parolin, Pia Barbosa, Keillah Mara Anoxia Hypoxia Hydrochoric Dispersal Seedlings Establishment Anoxia Hipoxia Dispersão Hidrocórica Estabelecimento De Plântulas Himatanthus sucuuba is a tree species with known phytotherapic value which colonizes both white-water floodplains (várzea) and upland forests (terra firme) in Central Amazonian. The objective of this study was to compare germination and initial seedling development from seeds collected in both the ecosystems. There was no significant difference between dry seed mass, but in a four month period in a glasshouse in Manaus, Brazil, germination rate differed according to the substrate and origin of the seeds. In the substrate sand + sawdust (non-flooded) germination rate was high, independent of seed origin (várzea 94% and terra firme 91%). In the substrate constituted only by water (flooded), the seeds originating from várzea had a higher germination rate (96%) and seedling formation (84%) than those originating from terra firme which had a germination rate of 64% and none of the seeds formed seedlings. In this treatment, the radicles rot few days after their emission, indicating that the seeds originating from várzea present adaptive characteristics to the floodplain environment which are not present in seeds from terra firme. Himatanthus sucuuba é uma espécie arbórea de reputado valor fitoterápico, que coloniza regiões de várzea e de terra firme na Amazônia Central. Objetivou-se verificar durante quatro meses, em casa de vegetação, a germinação e o desenvolvimento inicial de plântulas da espécie, oriundas de sementes dos dois diferentes ecossistemas. Não houve diferença significativa em relação ao peso de matéria seca de sementes da várzea e da terra firme. Entretanto, a taxa de germinação da espécie variou de acordo com o substrato e o local de procedência das sementes. No substrato areia+serragem (não-alagado) a germinação da espécie foi alta, independente do ambiente (várzea 94% e terra firme 91%). No substrato constituído apenas por água (alagado), as sementes provenientes da várzea tiveram a maior taxa de germinação (96%) e de formação de plântulas (84%), quando relacionadas às da terra firme, que apresentaram taxa de germinação de 64%, e nenhuma das sementes germinadas formou plântulas. Neste tratamento foi verificado o apodrecimento da radícula poucos dias após sua emissão, indicando que as sementes oriundas da várzea apresentam características adaptativas ao ambiente inundado em relação às da mesma espécie oriundas da terra firme. 2020-04-24T15:14:57Z 2020-04-24T15:14:57Z 2005 Artigo https://repositorio.inpa.gov.br/handle/1/13136 10.1590/S0102-33062005000300002 pt_BR Volume 19, Número 3, Pags. 425-429 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Botanica Brasilica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language pt_BR
topic Anoxia
Hypoxia
Hydrochoric Dispersal
Seedlings Establishment
Anoxia
Hipoxia
Dispersão Hidrocórica
Estabelecimento De Plântulas
spellingShingle Anoxia
Hypoxia
Hydrochoric Dispersal
Seedlings Establishment
Anoxia
Hipoxia
Dispersão Hidrocórica
Estabelecimento De Plântulas
Ferreira, Cristiane
Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
topic_facet Anoxia
Hypoxia
Hydrochoric Dispersal
Seedlings Establishment
Anoxia
Hipoxia
Dispersão Hidrocórica
Estabelecimento De Plântulas
description Himatanthus sucuuba is a tree species with known phytotherapic value which colonizes both white-water floodplains (várzea) and upland forests (terra firme) in Central Amazonian. The objective of this study was to compare germination and initial seedling development from seeds collected in both the ecosystems. There was no significant difference between dry seed mass, but in a four month period in a glasshouse in Manaus, Brazil, germination rate differed according to the substrate and origin of the seeds. In the substrate sand + sawdust (non-flooded) germination rate was high, independent of seed origin (várzea 94% and terra firme 91%). In the substrate constituted only by water (flooded), the seeds originating from várzea had a higher germination rate (96%) and seedling formation (84%) than those originating from terra firme which had a germination rate of 64% and none of the seeds formed seedlings. In this treatment, the radicles rot few days after their emission, indicating that the seeds originating from várzea present adaptive characteristics to the floodplain environment which are not present in seeds from terra firme.
format Artigo
author Ferreira, Cristiane
author2 Piedade, Maria Teresa Fernandez
Parolin, Pia
Barbosa, Keillah Mara
author2Str Piedade, Maria Teresa Fernandez
Parolin, Pia
Barbosa, Keillah Mara
title Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
title_short Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
title_full Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
title_fullStr Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
title_full_unstemmed Tolerância de Himatanthus sucuuba Wood. (Apocynaceae) ao alagamento na Amazônia Central
title_sort tolerância de himatanthus sucuuba wood. (apocynaceae) ao alagamento na amazônia central
publisher Acta Botanica Brasilica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/13136
_version_ 1787142731295883264
score 11.755432

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