Effect of Accelerated Aging Process on Seed Quality and Biochemical Changes in Sweet Pepper (Capsicum annuum Linn.) Seeds

Kaewnaree, Preeya; Vichitphan, Sukanda; Klanrit, Poramate; Siri, Boonmee; Vichitphan, Kanit

doi:10.3923/biotech.2011.175.182

Cited by 45 publications

(29 citation statements)

References 15 publications

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“…A temperatura de 40 ºC não foi a causa de declínio na atividade de enzimas como a α-galactosidase em sementes de Glycine max (Guimarães et al, 2001), Platymiscium pubecens (Borges et al, 2004) e Caesalpinia peltophoroides (Borges et al, 2005), β -mananase em sementes de Sesbania virgata (Lisboa et al, 2006), amilase em sementes de Zea mays (Biazus et al, 2009), lipase nas sementes de Oryza sativa (Bhardwaj et al, 2001), cisteína protease em sementes de Macrotyloma uniflorum (Jinka et al, 2009) e fosfatase ácida nas sementes de Zea mays (Senna et al, 2006) envolvidas tanto no enfraquecimento da parede celular ou no metabolismo em geral, durante o processo de germinação, em diferentes espécies, embora representem pequena amostragem frente à grande quantidade de enzimas envolvidas no processo. caso há duas alternativas, quais sejam a possibilidade de as membranas adquirirem parte de sua estrutura semipermeável ou ocorrer saída substancial de solutos, com pouco material restante nas células, resultando em perda da viabilidade das sementes (Kaewnaree et al, 2011). Aparentemente, a segunda alternativa se mostra mais atrativa, tendo em vista a baixa porcentagem de germinação no tempo de 48 horas de envelhecimento.…”

Section: Resultsunclassified

Adequação da metodologia do teste de condutividade elétrica para sementes de Pterogyne nitens Tull.

Ataíde

Flores

Borges

et al. 2012

Agraria

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RESUMOO amendoim do campo (Pterogyne nitens Tull.) é uma espécie florestal pertencente à família Leguminosae Caesalpinoidea, recomendada para reposição de áreas degradadas e arborização de vias urbanas e rodovias. O teste de condutividade elétrica é um teste de vigor de sementes, cuja medição dos exsudatos liberados durante sua condução reflete a integridade do sistema de membranas. O objetivo deste trabalho foi adequar a metodologia do teste de condutividade elétrica para sementes de P. nitens. As sementes tiveram a dormência superada com ácido sulfúrico concentrado e, em seguida, foram submetidas ao teste de envelhecimento acelerado a 40 °C, por períodos de 0 (testemunha), 24, 48 e 72 horas, determinando-se a porcentagem e a velocidade de germinação; em seguida realizou-se o teste de condutividade elétrica em sementes envelhecidas por 48 horas e testemunha, avaliando-se três quantidades de sementes (25, 50 e 75), três volumes de água destilada (25, 50 e 75 mL) e três tempos de embebição (24, 48 e 72 horas) na comparação do vigor das sementes pelo teste de condutividade elétrica. O delineamento empregado foi o inteiramente casualizado com cinco repetições, sendo as médias das sementes envelhecidas comparadas à testemunha pelo teste de Tukey a 5% e os valores de condutividade elétrica correlacionados aos resultados do teste de germinação. O teste de condutividade elétrica correlacionou-se com o vigor das sementes submetidas ao envelhecimento artificial. Desta forma, a utilização de 50 sementes embebidas em 50 mL de água destilada durante 24 horas é recomendada para a condução do teste de condutividade elétrica em sementes de P. nitens. Palavras-chave: deterioração, qualidade fisiológica de sementes, sementes florestais, vigor Adequacy of the methodology of electrical conductivity test for seeds of Pterogyne nitens Tull.ABSTRACT Pterogyne nitens Tull. is a forest species belonging to the family Leguminosae Caesalpinoidea, recommended for replacement of degraded areas and greening of urban roads and highways. The electrical conductivity test is a test of seed vigor, whose measurement of exudates released during their driving reflects the integrity of the membrane system. The objective of this study was to adapt the methodology of electrical conductivity test for seeds of P. nitens. The seed dormancy overcome with concentrated sulfuric acid and then were subjected to accelerated aging test at 40 ° C for 0 (control), 24, 48 and 72 hours, determining the rate and speed of germination. Then, the electrical conductivity in seeds aged for 48 hours and witness was done, evaluating three quantities of seeds (25, 50 and 75), three volumes of distilled water (25, 50 and 75 mL) and three soaking (24, 48 and 72 hours) in the comparison of seed vigor for electrical conductivity. The experimental design was completely randomized with five replicates, and the mean aged seeds compared to the control by the Tukey test at 5% and electrical conductivity values correlated to the results of the germination test. The electrical conducti...

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Section: Resultsunclassified

Adequação da metodologia do teste de condutividade elétrica para sementes de Pterogyne nitens Tull.

Ataíde

Flores

Borges

et al. 2012

Agraria

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“…In new seed and seed stored for up to 3 yr, small decreases in linoleic acid content are reflected in low germination and vigor. It is likely that this decrease was caused by seed deterioration due to free radicals from oxidized linoleic acid, which may have affected membrane and reserve lipids, resulting in damage to the membranes and to reserve substances, as Kaewnaree et al (2011) have stated. It is inferred that both the decrease in seed respiration caused by loss of reserves and peroxidation of linoleic acid (unsaturated) in seed cells contribute to tomatillo seed deterioration under natural storage conditions.…”

Section: Physiological Aspects Of Deteriorationmentioning

confidence: 89%

“…In a batch o f seed, deterioration causes discoloration, low germination and delayed seedling growth, abnormal seedlings and low yield (Bewley et al, 2013). In individual seed, respiration and enzymatic activity decrease and membranes are damaged (Kaewnaree et al, 2011). Moreover, seed deterioration involves other biochemical and biophysical changes, such as lipid peroxidation and stress caused by oxidative free radicals (Walters et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Fatty acids and physiological quality of tomatillo (Physalis philadelphica Lam.) seed during natural ageing

Pichardo-González

Ayala-Garay

González-Hernández

et al. 2014

Chilean J. Agric. Res.

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In Mexico, 44 thousand hectares are planted with tomatillo or husk tomato (Physalis philadelphica Lam.), which occupies fourth place among the country's vegetable species. However, research on this species is scarce, especially that related to the process of seed deterioration. We studied the effects of deterioration in tomatillo seed, var. CHFl-Chapingo, stored from 2-mo up to 7 yr with no climate control, 18.2 ± 5 °C and 41 ± 10% relative humidity, on physiological and biochemical variables during germination. It was found that germination, vigor, and respiratory activity decrease significantly from the first year of storage; thus, after 7 yr, germination and vigor decreased 99%, and respiratory activity of seed after 48 h imbibition decreased 78%. Linoleic acid (unsaturated) content correlated positively with germination (R = 0.78**) and with speed of radicle emergence (R = 0.79**). Germination correlated with speed of radicle emergence (R = 0.99**) and with respiratory activity after 48 h of imbibition (R = 0.79**). Both respiratory activity and fatty acid content are involved in natural deterioration of tomatillo seed.

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“…Seed deterioration is a complex biochemical and physiological process that leads to loss of germination capacity and electrolyte leakage is one associatedfeature that indicates the cellular damage extension (Kaewnaree et al, 2011). Furthermore, a reduction in germination, emergence in the field and vigor of the seedlings are linked to a high electrolyte leakage of the seeds (Mahjabin & Abidi, 2015).…”

Section: Discussionmentioning

confidence: 99%

Weight is a key factor in the physiological quality of Parapiptadenia rigida seeds

et al. 2018

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The objective of this work was to evaluate hygroscopicity modification of Eucalyptus dunnii, E. saligna and Corymbia maculata wood due to termites attack. Using samples measuring 20 x 20 x 150 mm³ (tangential x radial x longitudinal) the equilibrium moisture content (MCE), linear contractions of the tangential and radial planes (βT e βR), contraction anisotropy (CAβ), water absorption (AA) and water absorption rate (TAA) of healthy and deteriorated wood by Nasutitermes termites were evaluated. It was verified that the termite attack caused increase in TUE and reduction in βT. However, βR and CAβ presented different behaviors, varying among the different species. AA and TAA presented higher water absorption intensity in the first hours of immersion, being higher in the control group in comparison with the deteriorated samples. Possibly the variations in the parameters related to the wood hygroscopicity of the studied species are correlated to the increase of porosity and deterioration mainly of cellulose and hemicelluloses, directly affecting the wood's ability to absorb and lose moisture, compromising the material quality.

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Effect of Accelerated Aging Process on Seed Quality and Biochemical Changes in Sweet Pepper (Capsicum annuum Linn.) Seeds

Cited by 45 publications

References 15 publications

Adequação da metodologia do teste de condutividade elétrica para sementes de Pterogyne nitens Tull.

Adequação da metodologia do teste de condutividade elétrica para sementes de Pterogyne nitens Tull.

Fatty acids and physiological quality of tomatillo (Physalis philadelphica Lam.) seed during natural ageing

Weight is a key factor in the physiological quality of Parapiptadenia rigida seeds

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