Influence of potassium on the quality of grains and seeds of flooded rice

Potassium can influence the productivity and the physical and physiological qualities of grains and seeds of flooded rice, although its influence is not clear yet. Based on the necessity of more information, this work presents the evaluation of different stages of potassium application on rice grains productivity, physical quality (whole grain and chalk kernel) and seed physiological quality (vigor and germination). The results show that the potassium fertilization has an influence on the physical quality of rice grains. When performed near to the reproductive stage, it can increase the percentage of whole grains and decrease the chalk kernel index. For producing seeds, all fertilization should be done up to the V3 stage in order to increase the seed vigor.

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Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds

Brazilian Journal of Plant Physiology ◽

10.1590/s1677-04202005000200002 ◽

2005 ◽

Vol 17 (2) ◽

pp. 199-205 ◽

Cited By ~ 13

Author(s):

Sttela Dellyzete Veiga Franco da Rosa ◽

Delacyr da Silva Brandão Júnior ◽

Édila Vilela de Resende Von Pinho ◽

André Delly Veiga ◽

Luiz Hildebrando de Castro e Silva

Keyword(s):

Water Content ◽

Storage Temperature ◽

Removal Rate ◽

Coffea Canephora ◽

Development Stage ◽

Seed Vigor ◽

Drying Rate ◽

Physiological Quality ◽

Drying Rates

Desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. Coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. The objective of this study was to verify the effect of different drying rates on the viability and storability of Coffea canephora seeds. A complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°C). The germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. It was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. The greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. There was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°C. C. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°C. A temperature of 20ºC can be used to store C. canephora seeds, as long as the water content is not reduced to values below 22 % water content.

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Effect of seed vigor and sowing densities on the yield and physiological potential of wheat seeds

Journal of Seed Science ◽

10.1590/2317-1545v43241586 ◽

2021 ◽

Vol 43 ◽

Author(s):

Carolina Pereira Cardoso ◽

José Henrique Bizzarri Bazzo ◽

Jéssica de Lucena Marinho ◽

Claudemir Zucareli

Keyword(s):

Seed Yield ◽

Seedling Emergence ◽

Accelerated Aging ◽

Seed Vigor ◽

Wheat Crop ◽

Seedling Length ◽

Physiological Quality ◽

Initial Seed ◽

Wheat Seeds

Abstract: Initial seed vigor and sowing density interact in establishment of plants in the field, and can thus affect expression of the plasticity of the wheat crop and the yield and physiological quality of the seeds produced. The aim of this study was to evaluate the effect of seed vigor levels in combination with sowing densities on the yield and physiological potential of wheat seeds. The cultivars BRS Gralha-Azul and BRS Sabiá were used in a randomized block experimental design in a 2 × 4 factorial arrangement, with four replications. The treatments consisted of seeds of high and low vigor and four sowing densities (150, 250, 350, and 450 seeds.m-2). The following evaluations were made: seed yield, germination, first germination count, seedling length, seedling dry matter, accelerated aging, emergence speed index, and seedling emergence in sand. An increase in sowing density favors the seed yield of both cultivars; however, it reduces the vigor of the seeds produced by the cultivar BRS Gralha-Azul, especially of the seeds produced by plants originating from high vigor seeds. For the cultivar BRS Sabiá, an increase in sowing density decreases the germination performance of seeds produced by plants originating from low vigor seeds.

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Physiological quality of mechanically harvested chickpea seeds

Revista Engenharia na Agricultura - REVENG ◽

10.13083/reveng.v29i1.10907 ◽

2021 ◽

Vol 29 ◽

pp. 28-35

Author(s):

Letícia Betânia Xavier Dias ◽

Pedro Afonso de Melo Queiroz ◽

Thaís Cardoso de Castro ◽

Marco Antonio Moreira de Freitas ◽

Érica Fernandes Leão-Araújo ◽

...

Keyword(s):

Electrical Conductivity ◽

Significant Interaction ◽

Seed Quality ◽

Rotation Speed ◽

Mechanical Damage ◽

Seed Vigor ◽

Rotor Rotation ◽

Germination Speed ◽

Physiological Quality

Our objective was to evaluate the occurrence of mechanical damage in chickpea seeds with the combination of two harvester speeds (2.5 and 3.5 km.h-1) and three adjustments for rotor rotation speeds (500, 700, and 850 rpm). Harvesting was carried out in a seed production field. Seeds were evaluated for purity, germination (G), first count (FC), germination speed index (GSI), hypochlorite, electrical conductivity, and tetrazolium tests. There was an effect of harvester speeds on seed physiological quality for the first count (FC), germination (G), germination speed index (GSI), especially when combining with high rotor rotation speed. In these cases, the speed of 2.5 km.h-1 resulted in lower values. This harvester speed also had worse results when combining with 850 rpm for purity and hypochlorite tests. The tetrazolium test was not efficient in identifying differences in seed quality. There was no significant interaction between harvester speeds and rotor rotation speeds for the conductivity test. Evaluating the harvester speed’s isolated effect (3.5 km.h-1), we identified problems in seed vigor due to the higher value of exudates in the electrical conductivity test. Low harvester speed (2.5 km.h-1) associated with high rotor rotation speeds (700 and 850 rpm) causes a reduction of the physical and physiological quality of seeds.

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Tests for evaluating the physiological quality of pitaya seeds

Semina Ciências Agrárias ◽

10.5433/1679-0359.2015v36n6sup2p4047 ◽

2015 ◽

Vol 36 (6Supl2) ◽

pp. 4047

Author(s):

Thiago Alberto Ortiz ◽

Aline Moritz ◽

Lúcia Sadayo Assari Takahashi ◽

Mariana Ragassi Urbano

Keyword(s):

Electrical Conductivity ◽

Pearson Correlation ◽

Accelerated Aging ◽

Seed Vigor ◽

Water Volume ◽

Germination Test ◽

Accelerated Aging Test ◽

Aging Test ◽

Physiological Quality

Germination test is used to assess the physiological quality of seeds; however, since it is carried out under ideal conditions, this test has not been shown sufficient for this purpose. Instead, it is possible to use vigor tests, although the lack of standardized methodologies has reduced their applicability and reproducibility. Thus, this study aimed to develop methodologies for conducting tests of germination, accelerated aging, and electrical conductivity for the evaluation of the physiological quality of pitaya seeds. For this purpose, seeds from ripe Hylocereus undatus fruits were used. A completely randomized experimental design was used with four replications. The physiological quality of the seeds was assessed using germination, accelerated aging, and electrical conductivity tests, and the speed of germination index (SGI) and mean germination time (MGT) were determined for both the germination test and accelerated aging test. For the statistical analysis, we performed regression model adjustments and calculated the Pearson correlation coefficient (p < 0.05). The germination test for H. undatus seeds can be performed at 25 °C, with the aim of reaching the highest SGI and lowest MGT values. The accelerated aging test can be conducted at 43 °C for 48 h, because combining these factors favors the expression of seed vigor, allowing seeds to achieve the maximum SGI and minimum MGT, while reducing the time of the assay. The electrical conductivity test can be performed using 25 seeds at a temperature of 30 °C and a water volume of 10 mL, since under these conditions there is less interference from external factors on the leachate content of the solution.

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Allelopathic Effects of Purple Nutsedge Extract on the Physiological Quality of Cabbage and Tomato Seeds

Journal of Agricultural Science ◽

10.5539/jas.v11n17p260 ◽

2019 ◽

Vol 11 (17) ◽

pp. 260

Author(s):

Gabriel Pereira de Souza ◽

Isa Anastacia Borges ◽

Cleiton Gredson Sabin Benett ◽

Érica Fernandes Leão-Araújo ◽

Carmen Rosa da Silva Curvêlo ◽

...

Keyword(s):

Polynomial Regression ◽

Inhibitory Effect ◽

Seed Vigor ◽

Cyperus Rotundus ◽

Initial Development ◽

Purple Nutsedge ◽

Tomato Seeds ◽

Physiological Quality ◽

Allelopathic Effects

Invasive plants may present allelopathic substances that interfere with the germination and initial development of seedlings of various species. The objective of this study is to evaluate the physiological quality of cabbage and tomato seeds in the presence of different concentrations of purple nutsedge extract. The seeds were left to germinate in different substrates. Individual experiments were performed for both species. Five concentrations (0, 25, 50, 75 and 100%) of aqueous extract obtained from tubers of Cyperus rotundus were used. The seeds of each species were placed to germinate in three types of substrates (sand, commercial, and paper). Germination, normal seedlings, abnormal seedlings, non-germinated seeds, germination speed index, and accelerated aging were evaluated. A completely randomized experiment with a 3 × 5 factorial design (three substrates and five concentrations of purple nutsedge extract) was conducted with four replications. For the substrates, the means were compared by Tukey test at 5% probability. Polynomial regression analyses were carried out for concentrations of purple nutsedge extract. Cyperus rotundus exerts allelopathic effects on the germination of tomato and cabbage seeds. As the concentration of the tuber extract increases, the inhibitory effect increases, thus reducing germination and seed vigor in the different substrates. The commercial substrate for tomato and the paper substrate for cabbage may minimize the allelopathic effects of Cyperus rotundus extract during germination of seeds.

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Diet patterns of Moscow residents

City Healthcare ◽

10.47619/2713-2617.zm.2020.v1i2;32-37 ◽

2021 ◽

Vol 1 (2) ◽

pp. 32-37

Author(s):

Yurgita R. Varaeva ◽

Luiza Pavlic ◽

Aramais A. Khachatrian ◽

Elena V. Kirasirova ◽

Elena N. Livantsova ◽

...

Keyword(s):

Quality Of Life ◽

Dairy Products ◽

Fruits And Vegetables ◽

Whole Grains ◽

Whole Grain ◽

Diet Patterns ◽

Number Of Factors ◽

Grain Products ◽

Moscow Population

Background. Nutrition plays an important role in NCDs risk reduction, growth of the population life expectancy and quality of life. A number of factors influence the diet, including the region of living. Purpose. To analyze the diet patterns of Moscow residents. Materials and Methods. Questioning of 111 Moscow residents: 89 women and 22 men, aged 18 to 80 years with a median BMI of 26.9 kg/m2. Results. 67.4 % of respondents were committed to healthy, optimal nutrition. Full breakfast was noted by 63 %. Analyzing product groups: bread was included in the diet by 87 % of the responders; pastries and sweet products – 72 %; whole grains – 17 %; dairy products – 26 %; fruits and vegetables – 63−67 %; fish – 49 %; meat – 33 %; alcohol – 50 %. Conclusion. The study showed that a third of the Moscow population has an inappropriate diet. Insufficient consumption of fruits and vegetables, dairy products, cereals and whole-grain products is noted. That type of diet is associated with a risk of non-communicable diseases. In addition, a low commitment to regular physical activity is also established.

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Qualidade física de grãos beneficiados de cultivares de arroz produzidos em diferentes níveis de adubação

Ciência e Natura ◽

10.5902/2179460x40622 ◽

2020 ◽

Vol 42 ◽

pp. 29

Author(s):

Amanda Müller ◽

Paulo Carteri Coradi ◽

Jonatas Ibagé Steinhaus ◽

Guilherme Abreu Coelho de Souza ◽

Letícia Oliveira Carneiro ◽

...

Keyword(s):

Whole Grains ◽

Quality Analysis ◽

Average Yield ◽

Soil Fertilization ◽

Physical Quality ◽

Polished Rice ◽

Physical Classification ◽

Different Levels

Rice is one of the most cultivated cereals in the world and the increase in crop yield is associated with cultivars and levels of soil fertilization, and may suffer changes in grain quality after processing. The objective of this work was to evaluate the physical quality of grains of rice benefited as polished and integral of cultivars IR 424 RI and IR 431 CL as a function of different levels of fertilization. After the harvest, the grains were subjected to the debarking and polishing processes. Quality analysis was performed according to the physical classification of rice. The cultivar IR 424 RI obtained higher values of yellow, burned and plastered grains, and in the cultivar IR 431 LC more broken, chopped and stained grains were observed. The average yield of polished rice of cultivar IR 431 CL was 44.54% and cultivar IR 424 RI was 56.80%. Meanwhile, the average yield of whole rice of cultivar IR 431 CL was 65.02% and cultivar IR 424 RI was 73.08%. The increase in the fertilization levels of the rice influenced positively on the yield of whole grains, but did not present satisfactory results regarding the physical quality.

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The GReat-Child TrialTM: A Quasi-Experimental Dietary Intervention among Overweight and Obese Children

Nutrients ◽

10.3390/nu12102972 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2972

Author(s):

Hui Chin Koo ◽

Bee Koon Poh ◽

Ruzita Abd. Talib

Keyword(s):

Childhood Obesity ◽

Primary Schools ◽

Cognitive Theory ◽

Whole Grains ◽

Mean Difference ◽

Whole Grain ◽

Obese Children ◽

Co Morbidity ◽

Quasi Experimental

Diet composition is a key determinant of childhood obesity. While whole grains and micronutrients are known to decrease the risk of obesity, there are no interventions originating from Southeast Asia that emphasize whole grain as a strategy to improve overall quality of diet in combating childhood obesity. The GReat-Child Trial aimed to improve whole grain intake and quality of diet among overweight and obese children. It is a quasi-experimental intervention based on Social Cognitive Theory. It has a 12-week intervention and 6-month follow-up, consisting of three components that address environmental, personal, and behavioral factors. The intervention consists of: (1) six 30 min lessons on nutrition, using the Malaysian Food Pyramid to emphasize healthy eating, (2) daily deliveries of wholegrain foods to schools so that children can experience and accept wholegrain foods, and (3) diet counseling to parents to increase availability of wholegrain foods at home. Two primary schools with similar demographics in Kuala Lumpur were assigned as control (CG) and intervention (IG) groups. Inclusion criteria were: (1) children aged 9 to 11 years who were overweight/obese; (2) who did not consume whole grain foods; and (3) who had no serious co-morbidity problems. The entire trial was completed by 63 children (31 IG; 32 CG). Study outcomes were measured at baseline and at two time points post intervention (at the 3rd [T1] and 9th [T2] months). IG demonstrated significantly higher intakes of whole grain (mean difference = 9.94, 95%CI: 7.13, 12.75, p < 0.001), fiber (mean difference = 3.07, 95% CI: 1.40, 4.73, p = 0.001), calcium (mean difference = 130.27, 95%CI: 74.15, 186.39, p < 0.001), thiamin (mean difference = 58.71, 95%CI: 26.15, 91.28, p = 0.001), riboflavin (mean difference = 0.84, 95%CI: 0.37, 1.32, p = 0.001), niacin (mean difference = 0.35, 95%CI: 1.91, 5.16, p < 0.001), and vitamin C (mean difference = 58.71, 95%CI: 26.15, 91.28, p = 0.001) compared to CG in T1, after adjusting for covariates. However, T1 results were not sustained in T2 when intervention had been discontinued. The findings indicate that intervention emphasizing whole grains improved overall short-term but not long-term dietary intake among schoolchildren. We hope the present trial will lead to adoption of policies to increase whole grain consumption among Malaysian schoolchildren.

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Germination and vigor of stored Jatropha (Jatropha curcars L.) seeds

Journal of Seed Science ◽

10.1590/2317-1545v40n1183431 ◽

2018 ◽

Vol 40 (1) ◽

pp. 52-59

Author(s):

Solange Carvalho Barrios Roveri Jose ◽

Antonieta Nassif Salomão ◽

Luis Alberto Martins Palhares de Melo ◽

Izulmé Rita Imaculada Santos ◽

Bruno Galvêas Laviola

Keyword(s):

Seed Germination ◽

Moisture Content ◽

Initial Moisture Content ◽

Storage Conditions ◽

Seed Vigor ◽

Plastic Bag ◽

Physiological Quality ◽

Jatropha Seeds ◽

Seed Water Content

Abstract: Jatropha seeds are classified as orthodox. However, since it is an oil seed species, adequate storage conditions are required to ensure their longevity. The objective of this work was to evaluate the physiological quality of jatropha seeds stored in different environments and packaging, for periods of 3, 9 and 15 months. Three types of seed packaging bags (high density plastic bag, aluminized envelope and multiwall paper bag) were used, and the storage environments were cold and dry chamber (20 °C and 15% RH, constant), refrigerator (7 ± 3 °C, 48 ± 8% RH) and laboratory conditions (25 ± 3 °C, 51 ± 7% RH). The initial moisture content and seed germination were 7.1% and 89%, respectively. During storage, the physiological quality (germination and vigor) and moisture content of the seeds were evaluated. Seed water content ranged from 3.3 to 7.7%, depending on the permeability of the packaging and the storage environment. The highest longevity (15 months) without loss of viability was observed for jatropha seeds with initial moisture of 7.1%, packed in semipermeable plastic. Seed vigor was maintained, regardless of the environment and the type of packaging used, for up to nine months of storage.

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Assessing the physiological quality of common bean seeds using the Vigor-S® system and its relation to the accelerated aging test

Journal of Seed Science ◽

10.1590/2317-1545v41n2211401 ◽

2019 ◽

Vol 41 (2) ◽

pp. 187-195 ◽

Cited By ~ 2

Author(s):

André Dantas de Medeiros ◽

Laércio Junio da Silva ◽

Nayara Pereira Capobiango ◽

Camila Andrade Fialho ◽

Denise Cunha Fernandes dos Santos Dias

Keyword(s):

Common Bean ◽

Seedling Emergence ◽

Primary Root ◽

Accelerated Aging ◽

Growth Index ◽

Automated Analysis ◽

Seed Vigor ◽

Analysis Technique ◽

Physiological Quality

Abstract: Automated analysis of seed vigor stands out by allowing greater accuracy, standardization, objectivity, and speed in evaluation of the physiological potential of seed lots. The objective of this study was to evaluate the efficiency of the Vigor-S® system in assessing the physiological quality of common bean seeds compared to the information provided by the traditional vigor tests recommended for this species. Four genotypes of common bean were used, each one represented by four seed lots. Characterization of the physiological potential of the lots was carried out by the following tests: germination, first count of germination, seedling emergence, accelerated aging, and electrical conductivity. The results of these tests were compared with the data obtained from the image analysis technique, specifically the Vigor-S® system, which was used to evaluate seedling growth at two, three, and four days after the beginning of the germination test. Shoot length, primary root length, and seedling length were measured, as well as the growth index, uniformity index, and vigor index were calculated. Computerized analysis of seedling images using the Vigor-S® software is a reliable alternative for evaluation the physiological potential of bean seeds, and it produces information similar to evaluations traditionally used for that purpose.

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