Seed quality of rice cultivars stored in different environments

Marques, Eduardo Antônio Gomes; Araújo, Eduardo Fontes; Araújo, Roberto Fontes; Filho, Sebastião Martins; Soares, Plínio César

doi:10.1590/s2317-15372014000100004

Cited by 11 publications

(12 citation statements)

References 13 publications

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“…Marques et al (2014) have observed similar results studying three rice cultivars stored in four storage environments, namely, loss of germination vigor after reaching maximum germination and vigor. Macedo et al (1999) when assessing rice seeds of cultivar IAC 165, stored for 12 months in Campinas, SP, with a relative humidity of 72% and an average temperature of 21 °C, have observed a gradual decrease in germination from the eighth month.…”

Section: Resultssupporting

confidence: 61%

Dormancy and enzymatic activity of rice cultivars seeds stored in different environments

Marques

Araújo

et al. 2014

J. Seed Sci.

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-The objective of this study was to assess the dormancy and the enzymatic activity of seeds of rice cultivars during storage in different environments. After harvesting, the seeds of two rice cultivars (BRS Ourominas and BRSMG Caravera) were dried in the sun, to reach a moisture content around 13%. Then, they were packed in paper and stored in four environments: 5 ± 2 °C / 70 ± 5% RH, 12 ± 2 °C / 70 ± 5% RH, 18 ± 2 °C / 65 ± 5% RH and in a natural condition. Germination and enzymatic activity were assessed at the beginning and at 3, 6, 9 and 12 months of storage. The experiment was conducted in split subplots in a completely randomized design with three replications. The dormancy of seeds stored in the natural environment was exceeded in a shorter time than the dormancy of seeds stored in cold. Catalase and ascorbate peroxidase activity increased during the storage period, the most obviously in storage in natural environment to cultivate BRSMG Caravera. The activity of the enzyme α-amylase decreased during the storage period.Index terms: enzymes, germination, Oryza sativa L. Dormência e atividade enzimática de sementes de cultivares de arroz armazenadas em diferentes ambientes RESUMO -O objetivo deste trabalho foi avaliar a dormência e a atividade enzimática de sementes de cultivares de arroz durante o armazenamento em diferentes ambientes. Após a colheita, as sementes das cultivares de arroz BRS Ourominas (várzea) e BRSMG Caravera (terras altas) foram secadas ao sol, até atingirem teor de água em torno de 13%. Em seguida, foram acondicionadas em embalagem de papel e armazenadas em quatro ambientes: 5 ± 2 °C/70 ± 5% UR, 12 ± 2 °C/70 ± 5% UR, 18 ± 2 °C/65 ± 5% UR e em condição natural. A germinação e a atividade enzimática foram avaliadas no início e aos 3, 6, 9 e 12 meses de armazenamento. O experimento foi realizado no esquema de parcelas subdivididas no delineamento inteiramente casualizado com três repetições. A dormência das sementes armazenadas em ambiente natural foi superada em menor tempo do que as sementes armazenadas em câmara fria. Houve aumento da atividade das enzimas catalase e ascorbato peroxidase, com maior evidência no armazenamento em ambiente natural, para a cultivar BRSMG Caravera. A atividade da enzima α-amilase diminuiu durante o período de armazenamento.Termos para indexação: enzimas, germinação, Oryza sativa L.

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Section: Resultssupporting

confidence: 61%

Dormancy and enzymatic activity of rice cultivars seeds stored in different environments

Marques

Araújo

et al. 2014

J. Seed Sci.

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“…Some authors questioned the ability of EC test for seed deterioration monitoring in 4 8 9 *Means with the same letter in each column do not differ by LSD Fisher (p<0.05), G: Germination, EC: Electrical conductivity and TZ-V: High vigor seeds by tetrazolium at low temperature, suggesting that stabilization of membrane occurs, which results in lower leakage of exudates (Fessel et al, 2010). Contrarily other authors recommended this test for vigor evaluation even at low temperature storage (Panobianco et al, 2007;Mielezrski and Marcos-Filho, 2013;Marques et al, 2014). In our experiments, a greater sensitivity of high oleic G3 on the electrolytes leaching was observed in storage at 10°C (Fig.…”

Section: Resultssupporting

confidence: 64%

Ranges of Vigor Based on the Electrical Conductivity Test in Dehulled Sunflower Seeds

Szemruch¹,

Longo²,

Ferrari³

et al. 2015

Research J. of Seed Science

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Electrical Conductivity (EC) is a promising vigor test since it produces fast laboratory results. In sunflower, the leakage of electrolytes from the pericarp may interfere with exudates from embryo tissues. The aims of this work were (1) To determine the utility of the EC test using dehulled (without pericap) sunflower seeds to evaluate the vigor in different genotypes, exposed to contrasting seed filling period and storage conditions, (2) To explore the relationship between EC and germination values near post harvest and across storage period and (3) To propose ranges of vigor through EC, so as to categorize sunflower seeds lots. Seeds of commercial hybrids differentiated by acid composition (high and standard oleic acid), exploring contrasting seed filling period and storage conditions, were evaluated by EC, Tetrazolium (TZ-V) and Germination (G), near post harvest time and during storage period (1, 5, 9, 13 and 19 months). An independent set of 18 genotypes, stored during 1-108 months, were also analyzed for EC and G. Electric conductivity in dehulled seeds was effective to identify vigor differences of genotypes in different seed filling period and storage conditions. A general relationship between the loss of germination and vigor was established for sunflower. The ranges of vigor based on EC proposed for sunflower seeds classification were <70 µs cmG 1 gG 1 for high, 70-110 µs cmG 1 gG 1 for intermediate and >110 µs cmG 1 gG 1 for low vigor levels. It is the first report based on EC ranges to categorize the seed vigor of sunflower seeds lots.

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“…Drying and storage comprise some of the main processes in the rice seeds production since they provide their conservation until sowing in the next crop. However, when poorly handled, these processes can significantly alter the seed quantitative and qualitative characteristics (Marques et al, 2014a;Scariot et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Physical and physiological quality of rice seeds in function of drying temperature and storage

et al. 2021

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The objective with the work was to evaluate, during storage, the rice seeds physical and physiological quality, cultivar IRGA 424 RI, dried with different drying air temperatures. For such, rice seeds were harvested with a moisture content of 22%. Then, they were subjected to drying in a cross-flow dryer, operating in an intermittent system and using the 55 and 65 ºC drying air temperatures. After, samples containing 50 kg of seeds were stored in PP Woven Bags for 240 days. After drying and every 60 days, physical and physiological analyses were performed. The experiment was conducted under a completely randomized design, arranged in a split-plot scheme, with 4 replications. The physical quality, estimated by the seed hectoliter weight, decreased during storage, regardless of the drying air temperature. The germination percentage, as well as the vigor increased during storage, regardless of drying air temperature due to the dormancy overcoming process. The dry seeds with the highest drying air temperature showed less vigor throughout the storage, according to the cold test. The rice seeds drying with an air temperature of 65 ºC, promoted a higher drying speed and did not negatively influence the seeds physical and physiological quality, however, reduced the vigor.

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Seed quality of rice cultivars stored in different environments

Cited by 11 publications

References 13 publications

Dormancy and enzymatic activity of rice cultivars seeds stored in different environments

Dormancy and enzymatic activity of rice cultivars seeds stored in different environments

Ranges of Vigor Based on the Electrical Conductivity Test in Dehulled Sunflower Seeds

Physical and physiological quality of rice seeds in function of drying temperature and storage

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