Stress testing in the evaluation of vigour in maize seed

Grzybowski, Camila Ribeiro de Souza; Vieira, Roberval Daiton; Panobianco, Maristela

doi:10.5935/1806-6690.20150042

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…This is a low value if compared to the minima established for cereal crops such as corn, soybean, and rice, i.e., between 80 and 85% (BRASIL, 2013). Therefore, differently from the reported in other studies (VANZOLINI et al, 2007;COIMBRA et al, 2009;TUNES et al, 2012;GRZYBOWSKI et al, 2015) with seeds of the same species of this work, the germination distribution values were situated in a larger range, that is, from 77 to 90%. This is thought to be an indication that the germination test was efficient to differentiate the lots as to physiological potential.…”

Section: Resultscontrasting

confidence: 55%

“…The germination and vigor tests are used to select the best seed lots as to storage and field performance (GRZYBOWSKI et al, 2015;MARCOS FILHO, 2015). These are data which can be used in decision making processes as to the best moment to commercialize a seed lot, its best destination, its best position in the storage room, and even its selling price (NOGUEIRA et al, 2013;MARCOS FILHO, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Silva¹,

Martins²,

Cruz³

et al. 2017

Biosci. J.

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ABSTRACT:In a quality control program, seed vigor evaluation is of fundamental importance for the success of the program. The objective of this project was to evaluate the efficiency of several vigor tests to evaluate the physiological quality of Brachiaria brizantha cv. 'BRS Piatã' seed lots and to preview seedling emergence in the field. Ten grass seed lots of the B. brizantha cv. 'BRS Piatã' were evaluated by the following tests: germination, first count of germination, accelerated aging (43 °C/48 hours), cold test (seeds rolled in paper towel), seed water content before and after accelerated aging, electrical conductivity (50 and 75 mL, 25 °C and readings made 2, 4, 6, 8, and 24 hours after beginning the test), speed of germination index, and seedling emergence in sand substratum in the laboratory (26 ± 3 °C) and daily seedling counts between the 7th and the 21th day after sowing. The treatment replications were distributed in the laboratory according to a completely random design with four replications. Seedling emergence in the field data were analyzed according to a randomized complete block design. Treatment means were compared by the Scott Knott test, at the 5% level of probability. The tests for germination and first germination count, seedling emergence and first emergence count in the sand, and accelerated aging are useful to assess the vigor of seed batches of the piatã grass, and provide similar evidence to the seedling emergence in the field.

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Section: Resultscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Silva¹,

Martins²,

Cruz³

et al. 2017

Biosci. J.

View full text Add to dashboard Cite

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“…Creole variety showed inferior development compared to others. This result allows us to assume a seedlings emergence delaying the field due to the occurrence of cold and humid days (COIMBRA et al, 2009;MARCOS FILHO, 2015), a fact commonly found in early crops sown, mainly in colder places such as in the south of Brazil (GRZYBOWSKI; VIEIRA; PANOBIANCO, 2015).…”

Section: Resultsmentioning

confidence: 99%

Physiological Quality of Hybrids and Creole Maize Seeds

et al. 2019

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The aim of this study was to evaluate the physiological quality of hybrid maize seeds (within the validity period and expired seeds) and of a Creole variety within the validity period. The study was performed using the hybrids C1 BM3063 PRO 2 (valid until 12/2018) and C1 SYN8A98 (valid until 03/2017 - expired one year ago) and a Creole maize (freshly harvested, collected at Pato Branco city, Paraná State, Brazil). Seed germination, germination speed index, germination speed, cold test, length and fresh and dried matter of shoot and root system were evaluated in a laboratory experiment. In the field we evaluated emergency, emergency speed index, emergency speed, length and fresh and dried matter of aerial part. Creole cultivar had the worse performance in all the variables tested. Expired hybrid (SYN8A98) presented similar development to the hybrid within the validity period (BM3063) in practically all the evaluated parameters. SYN 8A98 hybrid can be sown without risks of reduced productivity, provided that cold periods during field establishment are avoided. Creole variety in question did not perform satisfactorily and could not be used as seed. Keywords: Seeds Validity Period. Open Pollinated Variety. Viability. Production Costs. Seeds Reuse. ResumoO objetivo deste estudo foi avaliar a qualidade fisiológica de sementes de milho híbrido (dentro do período de validade e sementes expiradas) e de uma variedade crioula dentro do período de validade. O estudo foi realizado utilizando os híbridos C1 BM3063 PRO 2 (válido até 12/2018) e C1 SYN8A98 (válido até 03/2017 - expirou há um ano) e um milho crioulo (recém-colhido, coletado na cidade de Pato Branco, Paraná, Brasil). Foram avaliados, em experimento laboratorial, a germinação de sementes, o índice de velocidade de germinação, a velocidade de germinação, o teste de frio, o comprimento e matéria fresca e seca da parte aérea e sistema radicular. No campo foram avaliados emergência, índice de velocidade de emergência, velocidade de emergência, comprimento e matéria fresca e seca da parte aérea. A cultivar crioula teve o pior desempenho em todas as variáveis testadas. O híbrido expirado (SYN 8A98) apresentou desenvolvimento similar ao híbrido dentro do período de validade (BM3063) em praticamente todos os parâmetros avaliados. O híbrido SYN 8A98 pode ser semeado sem riscos de produtividade reduzida, desde que sejam evitados períodos frios durante o estabelecimento em campo. A variedade crioula em questão não teve desempenho satisfatório e não pôde ser usada como semente. Palavras-chave: Período de Validade das Sementes. Variedade de Polinização Aberta. Viabilidade. Custos de Produção. Reutilização de Sementes.

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“…According to Zucarelli, Cavariani, Oliveira, and Nakagawa (2011), temperatures below the optimum recommended for maize seed germination slow down the imbibition process. Lower temperatures also enable difficulties in the reorganization of cell membranes and consequently cause delays in germination (Carvalho, Sediyama, Reis, Dias, & Moreira, 2009), influenced by physiological quality and the genotype (Grzybowski, Vieira, & Panobianco, 2015). Means followed by the same lowercase letter (in columns) or the same capital letter (in rows) do not differ by the Scott-Knott test at 5% of probability.…”

Section: Resultsmentioning

confidence: 99%

<b>Primary leaf growth and coleoptile length in maize seedlings

et al. 2018

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ABSTRACT. Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when germination was tested without light. Water availability and optimal temperature range did not affect the differential growth of the primary leaf in the hybrids. Pericarp thickness, lignin content and differences in enzyme expression in different genotypes were also not related to changes in the relationship of primary leaf growth with coleoptile length during the maize seed germination test.Keywords: Zea mays L.; germination test; lignin; enzymes.Crescimento diferencial da plúmula e do comprimento do coleóptilo de plântulas de milho RESUMO. A avaliação do potencial fisiológico de lotes de sementes de milho no processo de certificação é realizada pelo teste de germinação. No entanto, em alguns testes, são observados atrasos no crescimento das estruturas da parte aérea das plântulas, o que leva a considerá-las plântulas anormais, mas não reflete o comportamento do lote no campo. Objetivou-se, neste trabalho, investigar o efeito do genótipo, água, luz e temperatura sobre o crescimento diferencial da plúmula em relação ao comprimento do coleóptilo de plântulas de milho. Sementes de dois híbridos simples e dos seus recíprocos com característica de crescimento lento da plúmula, foram avaliadas em sua qualidade fisiológica, morfológica, histoquímica e expressão enzimática. Existem diferenças entre genótipos de milho no que se refere ao crescimento inicial da plúmula em relação ao coleóptilo, principalmente na ausência de luz no teste de germinação. Disponibilidade hídrica e temperatura não afetam a resposta dos híbridos em relação ao crescimento diferencial da plúmula. Espessura do pericarpo, presença de lignina ou diferenças na expressão das enzimas dos genótipos não estão relacionadas às variações de comprimento plúmula/coleóptilo, durante o teste de germinação.Palavras-chave: Zea mays L.; teste de germinação; lignina; enzimas.

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Stress testing in the evaluation of vigour in maize seed

Cited by 9 publications

References 4 publications

Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Evaluation the physiological quality of Brachiaria brizantha cv. BRS ‘Piatã’ seeds

Physiological Quality of Hybrids and Creole Maize Seeds

<b>Primary leaf growth and coleoptile length in maize seedlings

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