Recovery and germinative response of Amaranthus deflexus L. seeds under different  levels of water stress and luminosities

Fontes, Larissa de Oliveira; Oliveira, Alexandre Bosco de; Filho, Eneas Gomes; Lopes, Maria de Fátima de Queiroz; Costa Filho, José Hamilton da; Silva, Ítalo Nunes

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dc.creator	Fontes, Larissa de Oliveira
dc.creator	Oliveira, Alexandre Bosco de
dc.creator	Filho, Eneas Gomes
dc.creator	Lopes, Maria de Fátima de Queiroz
dc.creator	Costa Filho, José Hamilton da
dc.creator	Silva, Ítalo Nunes
dc.date	2019-01-04
dc.date.accessioned	2022-03-21T20:07:54Z
dc.date.available	2022-03-21T20:07:54Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/1804
dc.identifier	10.14295/cs.v9i4.1804
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77858
dc.description	The objective of this work was to evaluate, in two experiments, the effect of water stress and luminosity on the germinative behavior and vigor of Amaranthus deflexus L seeds. The seeds were sown in Petri dishes containing two sheets of filter paper moistened with distilled water, in the control treatment. Using this treatment-control configuration, as a standard of comparison, two assays were performed using subsamples from the same A. deflexus seed population. In the first experiment (experiment 1), solutions of polyethylene glycol 6000 (PEG 6000) were used, providing osmotic potentials of -0.3; -0.6; -0.9; -1.2 and -1.5 MPa; however, in the second trial (experiment 2) osmotic potentials of -0.1; -0.2; -0.3; -0.4 and -0.5 MPa were used. At the end of the test, the ungerminated seeds for each treatment were washed and germinated on a filter paper moistened with water. The germination and vigor of the seeds were evaluated through the first germination count, germination test, germination speed index and average germination time. The experimental design was completely randomized, in a 2 x 6 factorial scheme, totaling twelve treatments, with four replicates of 50 seeds each, in both trials. Water stress negatively affects the performance of A. deflexus seeds, reducing germination and vigor from -0.1 MPa. Seed germination was compromised by the absence of light, regardless of the applied stress levels. There was an increase in seed germination after application of the same at higher levels of water stress.	en-US
dc.description	The objective of this work was to evaluate, in two experiments, the effect of water stress and luminosity on the germinative behavior and vigor of Amaranthus deflexus L seeds. The seeds were sown in Petri dishes containing two sheets of filter paper moistened with distilled water, in the control treatment. Using this treatment-control configuration, as a standard of comparison, two assays were performed using subsamples from the same A. deflexus seed population. In the first experiment (experiment 1), solutions of polyethylene glycol 6000 (PEG 6000) were used, providing osmotic potentials of -0.3; -0.6; -0.9; -1.2 and -1.5 MPa; however, in the second trial (experiment 2) osmotic potentials of -0.1; -0.2; -0.3; -0.4 and -0.5 MPa were used. At the end of the test, the ungerminated seeds for each treatment were washed and germinated on a filter paper moistened with water. The germination and vigor of the seeds were evaluated through the first germination count, germination test, germination speed index and average germination time. The experimental design was completely randomized, in a 2 x 6 factorial scheme, totaling twelve treatments, with four replicates of 50 seeds each, in both trials. Water stress negatively affects the performance of A. deflexus seeds, reducing germination and vigor from -0.1 MPa. Seed germination was compromised by the absence of light, regardless of the applied stress levels. There was an increase in seed germination after application of the same at higher levels of water stress.	pt-BR
dc.format	application/pdf
dc.format	application/pdf
dc.format	application/pdf
dc.language	eng
dc.language	por
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1804/597
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1804/767
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1804/768
dc.rights	Copyright (c) 2019 Larissa de Oliveira Fontes, Alexandre Bosco de Oliveira, Eneas Gomes Filho, Maria de Fátima de Queiroz Lopes, José Hamilton da Costa Filho, Ítalo Nunes Silva	en-US
dc.source	Comunicata Scientiae; Vol. 9 No. 4 (2018); 603-612	en-US
dc.source	Comunicata Scientiae; v. 9 n. 4 (2018); 603-612	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.title	Recovery and germinative response of Amaranthus deflexus L. seeds under different levels of water stress and luminosities	en-US
dc.title	Recovery and germinative response of Amaranthus deflexus L. seeds under different levels of water stress and luminosities	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	Artigo Científico	pt-BR