scholarly journals Effect of processing stages in the physiological quality of maize seeds

2016 ◽  
Vol 10 (6) ◽  
pp. 819-823
Author(s):  
Thiago Alberto Ortiz ◽  
◽  
Marcio Antônio Nicoletti ◽  
Lúcia Sadayo Assari Takahashi ◽  
◽  
...  
Keyword(s):  
Maize Seeds ◽  
Physiological Quality

scholarly journals Physiological quality of hybrid maize seeds through respiratory and enzymatic activities

2016 ◽  
Vol 11 (20) ◽  
pp. 1879-1886 ◽  
Author(s):  
Oliveira dos Santos Heloisa ◽  
Vilela Von Pinho Iolanda ◽  
Vilela de Resende Von Pinho Eacute dila ◽  
Maria de Oliveira Pires Raquel ◽  
Fabiana da Silva Valk iacute ria ◽  
...  
Keyword(s):  
Enzymatic Activities ◽  
Maize Seeds ◽  
Physiological Quality ◽  
Hybrid Maize

scholarly journals Physiological quality of maize seeds produced under soil water deficit conditions

2020 ◽  
Vol 24 (7) ◽  
pp. 451-456
Author(s):  
Fernando H. B. Machado ◽  
Andréia M. S. de S. David ◽  
Silvânio R. dos Santos ◽  
Josiane C. Figueiredo ◽  
Cleisson D. da Silva ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Deficit ◽  
Irrigation Water ◽  
Field Capacity ◽  
Soil Water Deficit ◽  
Maize Hybrids ◽  
Maize Seeds ◽  
Physiological Quality ◽  
Water Depths

ABSTRACT Crop strategies focused on the rational use of water are required in semiarid regions. Thus, the objective of this work was to evaluate the physiological quality of maize seeds produced under soil water deficit conditions. Five irrigation water depth were established, based on the field capacity (100, 85, 70, 55 and 40%), to control the available water for two maize hybrids (2B-587 and DKB-390). A randomized block design was used, with a split-plot arrangement and four repetitions. The plots consisted of irrigation water depths, and the subplots consisted of maize hybrids. The seed water concentration, germination, and vigor were determined after the harvest, using data from first germination counting, seedling emergence, germination speed index, seedling length, and accelerated aging, electrical conductivity, and modified cold tests. The maize hybrid DKB-390 showed better physiological potential under the soil water deficit conditions evaluated. The irrigation water depths lower than 70% of field capacity resulted in decreases in soil water contents and affected negatively the physiological quality of the maize seeds produced.

scholarly journals Biochemical profiling and its role in physiological quality of maize seeds

2018 ◽  
Vol 40 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Daniele Nerling ◽  
Cileide Maria Medeiros Coelho ◽  
Adriele Brümmer
Keyword(s):  
Soluble Sugars ◽  
Accelerated Aging ◽  
Inorganic Phosphorus ◽  
Inbred Lines ◽  
Total Protein Content ◽  
Breeding Programs ◽  
Maize Hybrids ◽  
Maize Seeds ◽  
Physiological Quality

Abstract: Viability and vigor of seeds are physiological attributes influenced by a myriad of factors including the genotype. Biochemical profiling of maize seeds and its correlation with their physiological quality is of crucial importance in breeding programs that the aim is seeds of better quality. The main goal of this study was to analyze the genetic diversity among maize inbred lines and evaluate the biochemical components that have an important role in physiological quality of seeds. The seeds of the inbred lines and hybrids were submitted to viability test, vigor by the accelerated aging and cold tolerance, and biochemical profiling (total protein content, soluble proteins, total phosphorus, phytate, inorganic phosphorus, starch and soluble sugars). The genetic divergence between the inbred lines found, prompt us to conclude that genetic gains may exist in association with physiological quality of maize hybrids. Seeds with higher inorganic phosphorus and soluble sugars presented superior physiological quality than seeds with lower levels of those compounds.

scholarly journals Effect of production environments on storage and physiological quality of maize seed

2021 ◽  
Vol 8 ◽  
pp. 1-15
Author(s):  
Itala Thaísa Padilha Dubal ◽  
Ivan Ricardo Carvalho ◽  
João Roberto Pimentel ◽  
Cristian Troyjack ◽  
Vinícius Jardel Szareski ◽  
...  
Keyword(s):  
Dry Matter ◽  
Seed Quality ◽  
Maize Seed ◽  
Large Format ◽  
Maize Seeds ◽  
Production Environments ◽  
Physiological Quality ◽  
Large Round ◽  
Physiological Characters

Storage is a factor that can affect seed quality as a function of latent damages. The losses that most contribute to the reduction in germination and vigor during storage are those caused by humidity, mechanical and temperature-related, that may interfere with seed quality throughout storage. The aim of this study was evaluating the physiological quality of maize seeds produced in two environments and classified in different formats compared to storage periods. The experiment was carried out in the 2016 harvest in two cultivation environments: Entre-Ijuís, RS and Pelotas, RS. Seeds were stratified by thickness through sieves with oblong holes and stratified into small round, large round, small flat and large flat. Growing environments influence the physiological characteristics of maize seeds. The flat and large format seeds have superior physiological quality for the measured physiological characters. The small and round seeds present lower values for germination, first germination count, emergence speed index, shoot dry matter of emergence seedlings and shoot dry matter of germination seedlings. Corn seeds when stored under controlled conditions remain for long periods without causing decreases in physiological quality.

scholarly journals Mechanical Damages and Chemical Treatments in the Quality of Maize Seeds Stored

2019 ◽  
Vol 11 (3) ◽  
pp. 482
Author(s):  
Bárbara Gomes Ribeiro ◽  
Raquel Maria de Oliveira Pires ◽  
Tatiana Botelho Fantazzini ◽  
Hesoisa Oliveira dos Santos ◽  
Dayliane Bernardes de Andrade ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Chemical Treatment ◽  
Current System ◽  
X Ray ◽  
Chemical Treatments ◽  
Maize Seeds ◽  
Before And After ◽  
Physiological Quality ◽  
Fusarium Sp

The current system of seeds production is highly mechanized and these operations can contribute to losses in quality due the incidence of mechanical damages. The objective in this work was to study the effect of the chemical treatment and the storage on quality of maize seeds with mechanical damages. The seeds used were individually analyzed through X-ray test for the obtainment of three lots; 1-seeds without separation, 2-seeds without mechanical damages and 3-seeds with mechanical damages. The lots were evaluated according the physiological quality, sanity and enzymatic analyzes before and after the chemical treatment with the insecticide Maxim Advanced® and the fungicide Cruiser® and also after 90 days of storage. The chemical treatment of maize seeds is efficient in the control of pathogens, like Fusarium sp. The performance of seeds with internal and external damages can be maintained for 90 days when treated with fungicides and insecticides and stored in environment conditions. The isoenzymatic patterns of catalase (CAT), superoxide dismutase (SOD), malate dehydrogenase (MDH) and alcohol dehydrogenase (ADH), confirmed the higher deterioration of non-treated seeds during the storage. The mechanical damages found in seeds contribute to the reduction of viability and vigor of maize seeds.

scholarly journals Physical and physiological quality of corn seeds

2020 ◽  
Vol 9 (10) ◽  
pp. e7269108687
Author(s):  
Ítala Thaísa Padilha Dubal ◽  
Ivan Ricardo Carvalho ◽  
João Roberto Pimentel ◽  
Cristian Troyjack ◽  
Vinícius Jardel Szareski ◽  
...  
Keyword(s):  
Dry Matter ◽  
Zea Mays L ◽  
Shoot Length ◽  
Stem Diameter ◽  
Initial Growth ◽  
Maize Seedlings ◽  
Maize Seeds ◽  
Physiological Quality ◽  
Maize Plants

The aimed to evaluate the physical and physiological quality, as well the field initial performance of different maize seeds size, produced in two growing environments.  It were used seeds of the Amarelo maize (Zea mays L.) genotype, where it were produced in two growing environments at Rio Grande do Sul, in the crops season of 2016/2017. The environment that the seeds are produced and the seeds form affect the maize plants initial growth. Flat seeds are tend to have a better performance on field in relation to the initial growth. The seedlings originated from Entre Ijuís-RS present superiority to shoot length, stem diameter, roots dry matter and shoot dry matter, while Pelotas-RS determines the sieves yield. The round and small seeds present lower sieves yield, shoot length, root length and stem diameter of maize seedlings.

scholarly journals Physiological performance and expression of isozymes in maize seeds subjected to water stress

2014 ◽  
Vol 36 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Viviane Maria de Abreu ◽  
Édila Vilela de Resende Von Pinho ◽  
Renzo Garcia Von Pinho ◽  
Glória Maria de Freitas Naves ◽  
Izabel Costa Silva Neta ◽  
...  
Keyword(s):  
Water Stress ◽  
Maize Cultivars ◽  
Maize Seeds ◽  
Test Number ◽  
Enzymatic Systems ◽  
Physiological Quality ◽  
Osmotic Potentials ◽  
Selection Of

Early characterization of genotypes, through the previous assessment of physiological quality of their seeds and their enzymatic systems, can provide parameters capable of aiding in the selection of new maize cultivars tolerant to water stress. Thus, this study was aimed at assessing seed performance of five different maize lines subjected to four different water stress levels. The physiological quality of seeds germinated under the osmotic potentials of 0.0, -0.3, -0.6 and -0.9 MPa was assessed by germination test, number of strong normal seedlings and T50, as well as by the expression of the isozymes superoxide dismutase (SOD), catalase (CAT), glutamate oxaloacetate transaminase (GOT), esterase (EST), malate dehydrogenase (MDH), alcohol dehydrogenase (ADH), and of heat-resistant proteins. The osmotic potential of -0.9 MPa affected the physiological quality and vigor of seeds of all maize lines assessed. The highest values for the germination percent, in the lowest osmotic potentials assessed, were found in the seeds of line 63. However, seeds of line 91 were superior in regard to vigor. Increased expression of the enzymes SOD and CAT, considered as enzymes of the antioxidant system, was observed in seeds of lines 44 and 91. Thus, line 91 was considered as promising for tolerance to water stress.

scholarly journals Physiological potential of corn seeds treated with different dosages of molybdenum and potassium

2021 ◽  
pp. 411-418
Author(s):  
Gisely Paula Gomes ◽  
◽  
Robison Alesandro de Queiroz ◽  
Lúcia Sadayo Assari Takahashi ◽  
◽  
...  
Keyword(s):  
Crop Production ◽  
Dry Matter ◽  
Animal Feed ◽  
Cold Test ◽  
Dry Mass ◽  
Productive Capacity ◽  
Maize Seeds ◽  
Seedling Length ◽  
Physiological Quality

Corn is important in agriculture for its dual is uses as food and animal feed. The use of quality seeds is fundamental for outcomes in the field. The treatment of seeds with molybdenum may increase the productive capacity and uniformity of the corn. For this to work, the amount applied to the seeds must be adequate to promote development and increase the final crop production. Thus, the objective of this work was to verify the effects of molybdenum and potassium application on the germination and vigor of corn seeds. The physiological quality of the seeds was evaluated by germination, first count, seedling length (shoot and root), seedling dry matter mass, emergence, and the cold test. Six treatments (T1–T6) were performed, with T1 free of molybdenum and potassium and the others with varying dosages. The seeds were treated with a commercial product that containing molybdenum and potassium. The design was completely randomized, with four replications and six treatments. Smaller doses of molybdenum resulted in a higher percentage of normal seedlings. Based on the length and dry mass of the seedlings, it was verified that maize seeds were negatively impacted by increasing doses of molybdenum and potassium. In the emergence tests in sand, treatments T5 and T6 presented a greater number of seedlings. The physiological quality of corn seeds was not significantly influenced by the application of molybdenum and potassium in the first count and germination results in the cold and germination tests.

scholarly journals Physiological quality and amylase enzyme expression in maize seeds

2013 ◽  
Vol 37 (1) ◽  
pp. 40-48 ◽  
Author(s):  
Gustavo Evangelista Oliveira ◽  
Renzo Garcia Von Pinho ◽  
Thaís de Andrade ◽  
Édila Vilela de Resende Von Pinho ◽  
Custódio Donizete dos Santos ◽  
...  
Keyword(s):  
Selection Process ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Inbred Lines ◽  
Alpha Amylase ◽  
Department Of Agriculture ◽  
Maize Seeds ◽  
Expression Of Genes ◽  
Physiological Quality

The physiological quality of maize seeds is affected by the genotype. Thus, the study of expression of genes associated with this characteristic is important in the genotype selection process in breeding programs. The aim of this research was to study the expression of amylase enzymes associated with physiological quality of maize seeds with different genotypes and seed sizes. We further sought to assess the expression of these enzymes in dry and soaked seeds The experiment was conducted in the experimental area and the Central Seed Laboratory of the Department of Agriculture of the Universidade Federal de Lavras. Seeds of four maize inbred lines were used, classified in two sizes. The physiological quality of the seeds was evaluated by means of germination, seedling emergence, seedling emergence speed index and accelerated aging test. Expression of the alpha amylase enzyme was evaluated by the electrophoresis technique and expression of the alpha amylase B73, alpha amylase (LOC542522) and beta amylase 5 (amyb5) genes was studied by the qRT-PCR technique in dry and soaked seeds of the inbred lines. There is differentiated expression of amylase enzymes in maize seeds of inbred lines with different levels of physiological quality. higher expression of amylase enzymes is observed in soaked maize seeds. The expression of transcripts is higher in smaller as wellas in soaked maize seeds of inbred lines.

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