Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content
Water stress and seed water content can affect the first germination stages and disturb the full pasture establishment. This study aimed at evaluating the effect of substrate water availability and seed water content on the germination of Urochloa ruziziensis seeds, as well as verifying any harmful...
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Universidade Federal de Goiás
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doaj-2520405db6a34835a67812f4bc21efca2020-11-24T22:23:43ZengUniversidade Federal de Goiás Pesquisa Agropecuária Tropical1983-40632013-12-0143438539110.1590/S1983-40632013000400010Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture contentTathiana Elisa Masetto0Dágon Manoel Ribeiro1Rodrigo Kelson Silva Rezende2Universidade Tecnológica Federal do Paraná (UTFPR), Departamento de Ciências Agrárias, Pato Branco, PR, Brasil.Universidade Federal da Grande Dourados (UFGD), Faculdade de Ciências Biológicas e Ambientais, Dourados, MS, Brasil.Universidade Federal da Grande Dourados (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil.Water stress and seed water content can affect the first germination stages and disturb the full pasture establishment. This study aimed at evaluating the effect of substrate water availability and seed water content on the germination of Urochloa ruziziensis seeds, as well as verifying any harmful effect of seed imbibition. The treatments consisted of seeds with 9.5%, 11.3% and 14.6% of moisture content, subjected to substrate water availability simulated with aqueous solutions of polyethylene glycol 6000 (PEG 6000) of 0.0 MPa (PubMed control), -0.1 MPa, -0.2 MPa, -0.3 MPa and -0.4 MPa. The following characteristics were used to evaluate the seeds physiological quality: germination percentage and first counting, aerial and primary root length and seedlings fresh weight. The experimental design was completely randomized, with four replications of 50 seeds. All the evaluated characteristics were negatively influenced by the water potentials reduction, however, the U. ruziziensis seeds with 11.3% and 14.6% of moisture content showed a higher germination rate and seedlings growth at low water availability. Despite the reduction in the indexes evaluated for water deficiency, the damage extension in seeds was determined by seeds moisture content and water stress severity.https://www.revistas.ufg.br/pat/article/view/22634Tropical foragepolyethylene glycolseeds physiologic quality |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tathiana Elisa Masetto Dágon Manoel Ribeiro Rodrigo Kelson Silva Rezende |
spellingShingle |
Tathiana Elisa Masetto Dágon Manoel Ribeiro Rodrigo Kelson Silva Rezende Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content Pesquisa Agropecuária Tropical Tropical forage polyethylene glycol seeds physiologic quality |
author_facet |
Tathiana Elisa Masetto Dágon Manoel Ribeiro Rodrigo Kelson Silva Rezende |
author_sort |
Tathiana Elisa Masetto |
title |
Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
title_short |
Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
title_full |
Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
title_fullStr |
Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
title_full_unstemmed |
Germination of Urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
title_sort |
germination of urochloa ruziziensis seeds according to substrate water availability and seeds moisture content |
publisher |
Universidade Federal de Goiás |
series |
Pesquisa Agropecuária Tropical |
issn |
1983-4063 |
publishDate |
2013-12-01 |
description |
Water stress and seed water content can affect the first germination stages and disturb the full pasture establishment. This study aimed at evaluating the effect of substrate water availability and seed water content on the germination of Urochloa ruziziensis seeds, as well as verifying any harmful effect of seed imbibition. The treatments consisted of seeds with 9.5%, 11.3% and 14.6% of moisture content, subjected to substrate water availability simulated with aqueous solutions of polyethylene glycol 6000 (PEG 6000) of 0.0 MPa (PubMed control), -0.1 MPa, -0.2 MPa, -0.3 MPa and -0.4 MPa. The following characteristics were used to evaluate the seeds physiological quality: germination percentage and first counting, aerial and primary root length and seedlings fresh weight. The experimental design was completely randomized, with four replications of 50 seeds. All the evaluated characteristics were negatively influenced by the water potentials reduction, however, the U. ruziziensis seeds with 11.3% and 14.6% of moisture content showed a higher germination rate and seedlings growth at low water availability. Despite the reduction in the indexes evaluated for water deficiency, the damage extension in seeds was determined by seeds moisture content and water stress severity. |
topic |
Tropical forage polyethylene glycol seeds physiologic quality |
url |
https://www.revistas.ufg.br/pat/article/view/22634 |
work_keys_str_mv |
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