Condicionamento osmótico na qualidade fisiológica de sementes de cebola

Pereira, Márcio Dias; Aspiazú, Ignácio; Torres, Salvador Barros; Silva, Edvan Costa da

doi:10.4322/rca.1064

Cited by 2 publications

(4 citation statements)

References 10 publications

(20 reference statements)

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“…There was, therefore, an interdependency between the accessions and priming treatments for the evaluated traits. This performance has also been observed in other works, for accessions of P. guineense (SANTOS et al, 2015) and varieties of Solanum sessiliflorum (PEREIRA et al, 2012) and Stryphnodendron spp. (KISSMANN et al, 2010).…”

Section: Discussionsupporting

confidence: 88%

“…Thus, our results corroborate those obtained by Santos et al (2015) for the same species, and partially corroborate those observed with other species, such as Stryphnodendron spp. (KISSMANN et al, 2010), Solanum sessiliflorum (PEREIRA et al, 2012), and Myracrodruon urundeuva (VIRGENS et al, 2012), in all of which the priming with PEG 6000 acted negatively on the increase in germination percentage, germination speed, and germination speed index. Such behavior was only observed in accession Y93 seeds; in the other two accessions, priming influenced these parameters positively.…”

Section: Discussionmentioning

confidence: 99%

“…This priming agent acts by stimulating germination, as it activates the pentose phosphate pathway, providing additional oxygen to the germination process (MARCOS FILHO, 2005). KNO 3 has been successfully used on the seed germination of several crop species, like eggplant (NASCIMENTO et al, 2008), seashore paspalum (SHIM et al, 2008), tomato (NAWAZ et al, 2011), Solanum sessiliflorum (PEREIRA et al, 2012), Pinus bungeana (GUO et al, 2012), Abelmoschus esculentus (SHARMA et al, 2014), and Cercis siliquastrum (HARONI et al, 2015), among others. However, due to its low molecular weight, KNO 3 can penetrate seed tissues and thereby cause phytotoxicity, which is usually more severe with increasing time of seed exposure to the solution (BONOME et al, 2006) and increasing concentrations of the salt.…”

Section: Discussionmentioning

confidence: 99%

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SYNCHRONIZING THE in vitro GERMINATION OF Psidium guineense Sw. SEEDS BY MEANS OF OSMOTIC PRIMING

et al. 2016

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The Brazilian guava (Psidium guineense Swartz) is seed-propagated and, being native to the Caatinga biome, may frequently have uneven germination.Thus, we aimed to evaluate the synchronization of the in vitro seed germination of three accessions of the Brazilian guava, using water, polyethyleneglycol (PEG 6000), and potassium nitrate (KNO3) at different potentials and times of osmotic priming. Seeds from three accessions of the Brazilian guava (Y85, Y93,and Y97) from the UNEB/BA Germplasm Active Bank were subjected to the following pretreatments: -0.6, -1.0, -1.4, and -1,8 MPa PEG 6000; 10 and 20% KNO3 for 24h; 10 and 20% KNO3 for 48h; water for 24 and 48h; and non-primed seeds as the control. The experimental design was therefore a 10x3+1 factorial scheme. We assessed the germination percentage (G), mean germination time (MGT), germination speed (GS), and germination speed index (GSI). Data was subjected to analysis of variance followed by a means test (Duncan at 5% probability) and regression. There was interaction between the priming treatments and accessions for all evaluated features, except G. PEG 6000 decreased the MGT (from 6 to 8 days) and increased GS and GSI of seeds from all three accessions at potentials -1.0 to -1.5 MPa.Water-priming had a positive effect on MGT, GS, and GSI of accession Y85 seeds. KNO3 negatively affected germination of seeds from all three accessions. Thereby, we could synchronize seed germination of accessions Y85 and Y97 with PEG 6000.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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SYNCHRONIZING THE in vitro GERMINATION OF Psidium guineense Sw. SEEDS BY MEANS OF OSMOTIC PRIMING

et al. 2016

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“…Para tal, muitos estudos têm buscado reduzir o tempo necessário entre a semeadura e a emergência das plântulas, bem como para aumentar a tolerância das sementes às condições adversas durante a germinação. Alguns tratamentos como o uso do tratamento térmico e o condicionamento osmótico têm se mostrado eficientes nesse sentido, apresentando resultados promissores com sementes de diversas espécies (OLIVEIRA; GOMES FILHO, 2010;PEREIRA et al, 2012;MORAIS et al, 2014). Welter et al (2011), avaliando a germinação de sementes de maracujá-amarelo em função de tratamentos térmicos, concluíram que o tratamento térmico das sementes a 40 ºC por 15 minutos resulta em germinação aproximada de 75% e maior uniformidade de plântulas.…”

Section: Introductionunclassified

Pré-hidratação e condicionamento fisiológico de sementes de maracujazeiro amarelo

Araujo

Fernandes

Jardini

et al. 2017

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Resumo: Apesar de poucas informações a respeito da germinação de sementes de passifloráceas, é unânime a afirmativa de que o início e o término da germinação das sementes dessas plantas ocorrem de forma irregular. A alternativa viável para uniformizar a geminação tem sido o emprego de polietilenoglicol (PEG 6000). Assim, objetivou-se com o presente trabalho avaliar a germinação de sementes de maracujá-amarelo em resposta ao condicionamento osmótico com PEG 6000 e ao tratamento térmico. O delineamento experimental adotado foi inteiramente casualizado, em esquema fatorial (5 x 5) +1, com 4 repetições. Os fatores consistiram de cinco tempos de pré-hidratação das sementes (10, 15, 20, 25 e 30 minutos) e imersão em solução de PEG 6000 (-1,2 MPa) por 0, 12, 24, 36 e 48 h, mais um tratamento testemunha. A germinação foi avaliada por meio da porcentagem de sementes germinadas, deterioradas, duras e/ou mortas e com fungos, índice de velocidade de emergência e tempo médio de emergência. A pré-hidratação com água a 40 ºC e a imersão em PEG 6000 influenciaram positivamente a taxa de germinação, IVE e TME, das sementes de maracujá-amarelo. A pré-hidratação de sementes de maracujá-amarelo com água aquecida a 40 ºC por 20 minutos combinada à imersão em PEG 6000 por 36 h resulta em maior uniformidade de plântulas e 90% de germinação.Palavras-chave: Passiflora edulis. PEG 6000. Qualidade fisiológica. Termoterapia. Abstract:Although there is little information on the germination of passifloraceous seeds, it is unanimous that the germination of germination in the seeds of these plants occurs irregularly and a viable alternative to the use of polyethylene glycol (PEG) 6000). The objective of this study was to evaluate the germination of yellow passion fruit seeds in response to the osmotic conditioning with PEG 6000 and to the heat treatment. The experimental design was completely randomized, in a factorial scheme (5 x 5) +1, with 4 replicates. The factors consisted of five prehydration times (10, 15, 20, 25 and 30 minutes) and immersion in PEG 6000 (-1.2 MPa) solution for 0, 12, 24, 36 and 48 h, Plus a control treatment. Germination was evaluated by percentage of seeds germinated, deteriorated, hard and / or dead and with fungi, index of emergency speed, mean time of emergence. Prehydration with water at 40 ° C and immersion in PEG 6000 positively influenced the germination rate, IVE and TME of yellow passion fruit seeds. Prehydration of yellow passion fruit seeds with water heated at 40 ºC for 20 minutes combined with immersion in PEG 6000 for 36 h results in greater seedling uniformity and 90% germination.

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Condicionamento osmótico na qualidade fisiológica de sementes de cebola

Cited by 2 publications

References 10 publications

SYNCHRONIZING THE in vitro GERMINATION OF Psidium guineense Sw. SEEDS BY MEANS OF OSMOTIC PRIMING

SYNCHRONIZING THE in vitro GERMINATION OF Psidium guineense Sw. SEEDS BY MEANS OF OSMOTIC PRIMING

Pré-hidratação e condicionamento fisiológico de sementes de maracujazeiro amarelo

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