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Nitrogen source influences the antioxidative system of soybean plants under hypoxia and re-oxygenation Scientia Agricola
Borella,Junior; Becker,Rafael; Lima,Milene Conceição; Oliveira,Denise dos Santos Colares de; Braga,Eugenia Jacira Bolacel; Oliveira,Ana Claudia Barneche de; Amarante,Luciano do.
ABSTRACT: In this work, we compared nitrate-supplied plants (non-nodulated) with non-nitrate-supplied plants (nodulated) under oxygen privation of root system (hypoxia) and re-oxygenation (post-hypoxia; recovery) in order to verify whether N sources affect the antioxidant system during oxidative stress caused by hypoxia and post-hypoxia conditions. Antioxidant enzymatic activities, ascorbate redox state, and reactive oxygen species (ROS) levels were analyzed in roots and leaves of two soybean genotypes, Fundacep 53 RR and BRS Macota at reproductive stage R2, during hypoxia and post-hypoxia in an experiment carried out in a hydroponic system. The antioxidant system was strongly induced in roots of nitrate-supplied plants of both genotypes, with high...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Waterlogging; Oxidative stress; Antioxidative enzymes.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100051
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Unveiling the germination requirements for Cereus hildmannianus (Cactaceae), a potential new crop from southern and southeastern Brazil Acta Botanica
Becker,Rafael; Ri,Leandro Dal; Farias-Singer,Rosana; Singer,Rodrigo Bustos.
ABSTRACT Cereus hildmannianus K. Schum is a columnar cactus native to South and Southeast Brazil. The cultivation of this species seems justifiable for several reasons: its fruits are spineless and edible; it is not threatened with extinction; it naturally occurs in Pampa and Atlantic Forest under non-xeric conditions that may be unsuitable for the cultivation of other tropical cacti; and the plants are pollinator-dependent and so should benefit from native pollinators. This study aimed to test seed germination of C. hildmannianus with samples collected at three different localities in southern Brazil, as a necessary step preceding any attempts of management and domestication. Seeds were exposed to temperatures of 20° C, 25° C, 30° C and room temperature....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cacti; Cereus hildmannianus; Germinability; Germination; Synchronicity; Tuna.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400765
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