Seeds

Bewley, J. Derek; Black, M.

doi:10.1007/978-1-4899-1002-8

Cited by 1,480 publications

(69 citation statements)

References 61 publications

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“…Under osmotic stress simulated with polyethylene glycol (PEG), physiological responses can vary with species [11], as was also observed in different genotypes …”

mentioning

confidence: 87%

Germination of Sweet Sorghum Seeds in Different Water Potentials

Rezende¹,

Masetto²,

Oba³

et al. 2017

AJPS

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The implantation of sweet sorghum has been shown as viable alternative in crop rotation in sugar cane plantation reform areas. The seed environment in the field is complex and several factors, such as different genotypes and osmotic stress, can negatively influence the seeds water uptake and, therefore, the sequence of germination events can be compromised. In this context, the objective of this study was to evaluate the different physiological responses of sweet sorghum seeds (Sorghum bicolor (L.) Moench) belonging to the hybrids CV 007 and CV 147 and cultivar BRS 506 when submitted to substrates with different water potentials (−0.1, −0.2, −0.3, −0.4, and −0.5 MPa) using solutions of polyethylene glycol (PEG 6000). The seeds remained in Biochemical Oxygen Demand-type germination chambers, under constant white light and the temperature of 25˚C for 14 h in the high temperature and 10 h in the low temperature. The moisture of the substrates was regularly monitored. The physiological potential of the genotypes was evaluated using the following characteristics: first count, germination, germination speed index (GSI), root length, and fresh and dry weights of seedlings. In general, germination and early growth of seedlings were negatively affected by the reduction of water potentials below −0.1 MPa, which was also damaging to the GSI of the seeds. Germination and growth of seedlings of the hybrids CV 007 and CV 147 and of the cultivar BRS 506 were affected by reduced water potentials starting at −0.1 MPa. The seeds of hybrid CV 147 were more tolerant to simulated water stress with PEG 6000 than those of hybrid CV 007 and cultivar BRS 506.

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“…Under osmotic stress simulated with polyethylene glycol (PEG), physiological responses can vary with species [11], as was also observed in different genotypes …”

mentioning

confidence: 87%

Germination of Sweet Sorghum Seeds in Different Water Potentials

Rezende¹,

Masetto²,

Oba³

et al. 2017

AJPS

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“…A hidratação tem sido entendida como um processo físico diretamente relacionado com as características de permeabilidade do envoltório (pericarpo) e as propriedades dos coloides constituintes dos grãos (Woodstock,1988;Bewley & Black, 1994). A cinética de hidratação tem sido amplamente caracterizada por produtos como grãos de cereais e leguminosas (Abu-Ghannam & Emckenna, 1997;Lucas et al, 2007).…”

Section: Introductionunclassified

Análise da hidratação de grãos de alpiste

Lisbôa

Silva

Cavalcanti³

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M ONeste trabalho se objetivou estudar o fenômeno de hidratação em grãos de alpiste (Phalaris canariensis L.) em diferentes temperaturas. Foram utilizados grãos secos de alpiste, embebidos em água destilada, nas temperaturas de 10, 25 e 45 °C. O aumento da temperatura resultou em aumento da taxa de absorção de água e o modelo de Peleg se ajustou satisfatoriamente aos dados experimentais. O coeficiente efetivo de difusão aumentou com a variação crescente da temperatura, de 2,396 até 2,428×10 -13 m² s -1 . A dependência do coeficiente efetivo de difusão com a temperatura pode ser descrita pela relação de Arrhenius apresentando, para a faixa de temperatura estudada, a magnitude da energia de ativação aparente para o processo de 39,239 ± 4,3463. Analysis of hydration of grains of birdseed A B S T R A C TThe objective of this work was to study the hydration of grains of birdseed (Phalaris canariensis L.) at different temperatures. Dried birdseed beans were used embedded in distilled water at temperatures of 10, 25 and 45 °C. Increasing the temperature resulted in higher water absorption rate and the model of Peleg adjusted satisfactorily to experimental data. The effective diffusion coefficient increased with increasing temperature from 2.396 to 2.428 × 10 -13 m² s -1 . The dependence of the effective diffusion coefficient on temperature can be described by the Arrhenius relationship, presenting, for the studied temperature range, the magnitude of the apparent activation energy for the process of 39.239 ± 4.3463. Palavras-chave:difusão Peleg Phalaris canariensis L.

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“…In this way, many of the physiological and biochemical changes caused by ABA in developing embryos can be induced by low osmotic potential [18]. Otherwise indicating the important role of ABA in this process [23].…”

Section: Resultsmentioning

confidence: 93%

“…After 120 h of imbibition, the seeds showed primary root protrusion. C. adamantium seeds imbibed in distilled water showed initial germination stages (phases I, II, and III) (Figure 1(a)) that corresponded to the standard tri-phase [18]. However, this behavior was not observed in seeds imbibed in PEG with or without ABA, and these treatments produced a gradual and slow reduction of water content after 120 h of imbibitions (Figure 1(b)).…”

Section: Resultsmentioning

confidence: 99%

“…However, this behavior was not observed in seeds imbibed in PEG with or without ABA, and these treatments produced a gradual and slow reduction of water content after 120 h of imbibitions (Figure 1(b)). Seed incubation in PEG regulated the amount of absorbed water by providing conditions for the development of the early germination stages (phases I and II), but without reaching stage III, which corresponded to radicle protrusion [18].…”

Section: Resultsmentioning

confidence: 99%

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Reduced Sensitivity of <i>Campomanesia adamantium</i> (Cambess.) O. Berg Seeds to Desiccation: Effects of Polyethylene Glycol and Abscisic Acid

Dresch¹,

Masetto²,

Jeromini³

et al. 2017

AJPS

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The Campomanesia adamantium is a threatened species from Brazil Savannah which seeds are desiccation-sensitive and do not withstand storage. This study aimed to reduce the sensitivity of Campomanesia adamantium seeds to desiccation using polyethylene glycol (PEG) and abscisic acid (ABA). Initially, seeds were subjected to PEG (0, −1.48, and −2.04 MPa) with or without ABA (100 μM) during 120 h, followed fast drying (silica gel) or slow drying (laboratory environment), at 20%, 15%, and 10% moisture content. In the second experiment, the seeds were PEG treated (−1.48 MPa) which provided the best results in the first experiment; the seeds were then subjected to different incubation times in PEG (30, 60, 90, or 120 h) and ABA (0, 10 −3 , 10 −4 , and 10 −5 µM), following the seeds were fast dried at 15% moisture content. The slow drying should be avoided, even in seeds previously subjected to osmotic conditioning with or without ABA. Seeds submitted to PEG treatment (−1.48 MPa/120h) without ABA and PEG (−1.48 MPa) with 10 −3 or 10 −4 µM of ABA (90 h), followed by fast drying at 15% moisture content showed reduction of desiccation sensitivity and high germination and vigor when compared to the other treatments.

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Seeds

Cited by 1,480 publications

References 61 publications

Germination of Sweet Sorghum Seeds in Different Water Potentials

Germination of Sweet Sorghum Seeds in Different Water Potentials

Análise da hidratação de grãos de alpiste

Reduced Sensitivity of <i>Campomanesia adamantium</i> (Cambess.) O. Berg Seeds to Desiccation: Effects of Polyethylene Glycol and Abscisic Acid

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Seeds

Cited by 1,480 publications

References 61 publications

Germination of Sweet Sorghum Seeds in Different Water Potentials

Germination of Sweet Sorghum Seeds in Different Water Potentials

Análise da hidratação de grãos de alpiste

Reduced Sensitivity of &lt;i&gt;Campomanesia adamantium&lt;/i&gt; (Cambess.) O. Berg Seeds to Desiccation: Effects of Polyethylene Glycol and Abscisic Acid

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Reduced Sensitivity of <i>Campomanesia adamantium</i> (Cambess.) O. Berg Seeds to Desiccation: Effects of Polyethylene Glycol and Abscisic Acid