Composição química de sementes de trigo (Triticum aestivum L.) submetidas a estresse salino na germinação

Silva, Rodrigo Nascimento da; Duarte, Gabriela Bohlmann; Lopes, Nei Fernandes; Moraes, Dário Munt de; Pereira, Ana Lúcia

doi:10.1590/s0101-31222008000100027

Cited by 9 publications

(9 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition to influencing germination, temperature affects the initial development of seedlings and directly affects their phenology because they have neither the ability of the seeds to tolerate adverse environmental conditions nor the physical robustness acquired with age (Miranda, Correia, Almeida-Cortez, & Pompelli, 2014;Sanchez et al, 2014). Thus, the germination period involves a series of transformations that depend on favorable environmental conditions, leading to high mortality rates when conditions are unfavorable in this development stage (Silva, Duarte, Lopes, Moraes, & Pereira, 2008;Oliveira, Souza, Carvalho, & Souza, 2015).…”

Section: Introductionmentioning

confidence: 99%

Germination and biochemical components of Salvia hispanica L. seeds at different salinity levels and temperatures

et al. 2018

View full text Add to dashboard Cite

Most plant species are susceptible to the effects of salinity, such as increases in osmotic potentials and deleterious ionic effects, which in turn affect water absorption in plants and, consequently, compromise germination and seedling growth. Hence, this study aimed to evaluate the effects of salinity on the germination, initial growth, and physiological and biochemical components of S. hispanica seedlings at different temperatures. The experimental design was completely randomized, with treatments distributed in a 5 x 4 factorial scheme with five saline concentrations (0.0 (control), 4.5, 9.0, 13.5, and 18.0 dS m-1) four temperature regimes (20, 25, 30, and 20-30°C), and four replicates of 50 seeds per treatment. The experiment evaluated the germination, growth, biochemical components (chlorophyll a, chlorophyll b, total carotenoids, amino acids, proline and sugars) and phytomass accumulation of S. hispanica seedlings. Saline levels higher than 4.5 dS m-1 together with treatment temperatures of 30 or 20-30°C negatively affected the germination, vigor, growth and biochemical components of the seedlings. The 25°C treatment temperature promoted the best conditions for the development of S. hispanica seedlings up to the saline level of 9.0 dS m-1 .

show abstract

Section: Introductionmentioning

confidence: 99%

Germination and biochemical components of Salvia hispanica L. seeds at different salinity levels and temperatures

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Nevertheless, mobilization undergoes the effect of osmotic components (Reis et al, 2012), of salinity (Silva et al, 2008;Dantas et al, 2014), of light and growth regulators (Ren et al, 2007;Zanotti et al, 2014), of accelerated aging (Zhu and Chen, 2007;Menezes et al, 2014), and of storage (Abbade and Takaki, 2014), factors which may accelerate or slow the process, as well as hurt the development of normal seedlings.…”

Section: Introductionmentioning

confidence: 99%

Alternating temperature and accelerated aging in mobilization of reserves during germination of Carica papaya L. seeds

et al. 2015

View full text Add to dashboard Cite

-The aim of this study was to identify the phases of water absorption during germination of Carica papaya seeds and evaluate the influence of alternating temperature and accelerated aging on mobilization of reserves during germination. Weight gain was evaluated, obtaining the imbibition curve. Phase I of germination comprises the period from zero to five hours; phase II, from five to 120 hours; and phase III begins after 144 hours. Seeds were subjected to the germination test under temperatures of 25 ºC and of 20-30 ºC (16/8 h), and before and after accelerated aging (43 °C / 72 h). During the germination test, at initial time, after 4, 10, 120, and 240 hours of soaking, we determined the levels of soluble sugars, starch, lipids, and total proteins. Greater germination was observed under alternating temperature. Under this condition, there is reduction of carbohydrates, lipids, and proteins in phase I, and fluctuations in lipid levels, and an increase in protein levels during phases II and III. Mobilization of lipids in papaya seeds is not influenced by accelerated aging, but the seeds subjected to aging have lower protein content in phase III.Index terms: soaking, papaya, soluble sugars, starch, lipids, proteins.Alternância de temperatura e envelhecimento acelerado na mobilização de reservas durante a germinação de sementes de Carica papaya L.RESUMO -Objetivou-se, neste trabalho, identificar as fases da absorção de água durante a germinação de sementes de Carica papaya e avaliar a influência da alternância de temperatura e do envelhecimento acelerado na mobilização de reservas durante a germinação. Foi avaliado o ganho de peso, obtendo-se a curva de embebição. A fase I da germinação compreende o período entre zero e cinco horas; a fase II, entre cinco e 120 horas; e a fase III se inicia após 144 horas. Sementes foram submetidas ao teste de germinação sob temperaturas de 25 ºC e de 20-30 ºC (16/8 h), e antes e após o envelhecimento acelerado (43 °C / 72 h). Durante o teste de germinação, no tempo inicial, após 4, 10, 120 e 240 horas de embebição, foram determinados os teores de açúcares solúveis, amido, lipídeos e proteínas totais. Observou-se maior germinação sob alternância de temperatura. Nesta condição há redução dos carboidratos, lipídeos e proteínas na fase I, flutuações nos teores de lipídeos e aumento nos teores de proteínas durante as fases II e III. A mobilização dos lipídeos em sementes de mamão não sofre influência do envelhecimento acelerado, mas as sementes submetidas ao envelhecimento apresentam menor teor de proteínas na fase III.Temos para indexação: embebição, mamão, açúcares solúveis, amido, lipídeos, proteínas.

show abstract

“…The increase of starch content may be explained by the amelioration of leaf architecture of plants subjected to the application of the plant growth regulator (Zagonel and Fernandes, 2007), enabling greater efficiency in capturing and absorbing solar radiation, which resulted in a higher rate of assimilate production. Similar levels of starch were quantified while studying starch content of rice seeds (Neves et al, 2007) and the chemical composition of wheat seeds (Silva et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The tubes were agitated and the optical density was measured in a spectrophotometer at 595 nm (Biospectro, model SP-22). A study evaluating the protein content in wheat seeds using the method described above was performed by (Silva et al, 2008).…”

Section: Evaluation Of Seed Compositionmentioning

confidence: 99%

Chemical composition and physiological quality of wheat seeds with the application of trinexapac-ethyl, a plant growth regulator

Koch¹,

Zimmer²,

Monteiro³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

This study evaluated the effect of the plant growth regulator trinexapac-ethyl on chemical composition and physiological quality of wheat seeds produced under fertilization for high yield potential. The experiment was performed under completely randomized design with five treatments (0; 200; 400; 600; 800 mL ha-1 of the commercial product Moddus ®) and four repetitions. The plant growth regulator was applied at elongation via foliar spraying. Seeds were harvested at the end of crop cycle. Variables evaluated were 1000 seeds weight, germination and first count of germination, speed of germination index, seedling dry matter, electrical conductivity, accelerated ageing and the contents of total soluble sugars, starch, amino acids and proteins. The first count of germination increased until the higher dose. Electrical conductivity after three hours of imbibition reduced at the doses of 600 mL ha-1 and 800 mL ha-1 , indicating greater seed physiological quality. Starch showed a trend of increase until the dose of 448 mL ha-1 ; amino acids until the dose of 243 mL ha-1 and protein until the dose of 417 mL ha-1. The content of total soluble sugars decreased with the increasing dose of the plant growth regulator. Therefore, wheat seeds produced from plants in which trinexapac-ethyl is applied present higher vigor and greater contents of starch, protein and amino acids, but lower content of total soluble sugars. Our results demonstrate that trinexapac-ethyl can be used for wheat management in seed production fields in the recommended dose (400 mL ha-1) with benefits in seed quality and composition.

show abstract

Composição química de sementes de trigo (Triticum aestivum L.) submetidas a estresse salino na germinação

Cited by 9 publications

References 13 publications

<b>Germination and biochemical components of <i>Salvia hispanica</i> L. seeds at different salinity levels and temperatures

<b>Germination and biochemical components of <i>Salvia hispanica</i> L. seeds at different salinity levels and temperatures

Alternating temperature and accelerated aging in mobilization of reserves during germination of Carica papaya L. seeds

Chemical composition and physiological quality of wheat seeds with the application of trinexapac-ethyl, a plant growth regulator

Contact Info

Product

Resources

About