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Germination and seed vigor of Gallesia integrifolia under saline stress

Authors: Lopes, José Carlos; Freitas, Allan Rocha de; Beltrame, Rômulo André; Venancio, Luan Peroni; Manhone, Pedro Ramon; Silva, Fernanda Rodrigues Nunes e;

Germination and seed vigor of Gallesia integrifolia under saline stress

Abstract

 A salinidade dos solos é um dos mais importantes fatores de estresse abiótico, afetando negativamente diversos aspectos da fisiologia e bioquímica das plantas. Este trabalho teve por objetivo avaliar o efeito do pré-condicionamento de sementes de Gallesia integrifolia sob de estresse salino com nitrato de potássio (KNO3) e nitropurinato de sódio (SNP). As sementes foram tratadas através do pré-condicionamento de imersão em soluções com cinco concentrações de KNO3 (0,0, 0,01, 0,1, 1 e 10 mg L-1) e de SNP (0, 0,01, 0,1, 1 e 10 mg L-1) por uma hora. Em seguida, as sementes foram distribuídas em folhas de papel filtro previamente umedecidos com soluções salinas em três potenciais osmóticos (0,0, -0,6 e - 1,2 MPa), sendo os rolos de papel mantidos em câmara de germinação do tipo BOD sob temperatura alternada de 20-30 ºC com fotoperíodo de 8/16 h durante 22 dias. Observou-se que o menor potencial osmótico acarretou redução das médias para todas as variáveis avaliadas. O potencial osmótico de -1,2 MPa influenciou negativamente a germinação e vigor de sementes de pau d’alho. KNO3 e SNP na concentração de 1 mg L-1 proporcionam redução do efeito salino nas sementes.

Soil salinity is a major abiotic stress factor, adversely affecting many aspects of plants physiology and biochemistry. This study aimed to evaluate the effect of preconditioning seeds of Gallesia integrifolia with potassium nitrate (KNO3) and sodium nitroprussiate (SNP) under saline stress. Seeds were treated through the preconditioning immersion in solutions with five concentrations of KNO3 (0, 0.01, 0.1, 1 and 10 mg L-1) and of SNP (0, 0 01, 0.1, 1 and 10 mg L-1) for one hour. Then, they were distributed in previously moistened filter paper sheets with saline solutions in three osmotic potentials (0, -0.6 and -1.2 MPa). The paper rolls were kept in germination chamber type BOD under alternating temperature of 20-30 °C with photoperiod of 8/16 h for 22 days. It was observed that lower osmotic potential resulted in reduction for all variables average. The osmotic potential of -1.2 MPa influenced negatively the germination and vigor of G. integrifolia. KNO3 and SNP at concentration of 1 mg L-1 reduces the saline effect in seeds.

Keywords

Initial development, Salinity, Gallesia integrifolia, Antioxidantes exógenos, Desenvolvimento inicial, Exogenous antioxidants, Salinidade

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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