scholarly journals Physiological quality of castor seeds (Ricinus communis L.) after processing

2019 ◽  
Vol 41 (2) ◽  
pp. 224-232
Author(s):  
Anailda Angélica Lana Drumond ◽  
Juliana de Fátima Sales ◽  
Jacson Zuchi ◽  
Gessimar Nunes Camelo ◽  
Moara Mariely Vinhais Souza
Keyword(s):  
Castor Bean ◽  
Ricinus Communis ◽  
Accelerated Aging ◽  
Raw Material ◽  
Processing Unit ◽  
Randomized Design ◽  
Germination Speed ◽  
Physiological Quality ◽  
Castor Seeds

Abstract: Castor bean seeds are the raw material used for extracting oil destined to pharmaceutical and industrial ends. The appropriate application of post-harvest technologies, such as processing, is required to ensure the production of top quality seeds. Thus, this study aimed at assessing the physiological quality of seeds from two castor bean genotypes, classified according to their specific mass and size. Castor seeds of the genotypes EVF102 and EVF103 were mechanically harvested and then classified with the aid of cylindrical sieves and a densimetric table. This procedure was conducted at the processing unit of the company Sementes Goiás LTDA [Goiás Seeds Co.]. Evaluations of seed physiological quality were carried out in the Seed Laboratory of Instituto Federal Goiano, following a completely randomized design. The testing was conducted in four replicates, in a 2 x 2 x 5 factorial scheme (two genotypes x two sizes x five specific masses). The following parameters were appraised: (a) mass of one thousand seeds; (b) germination; (c) germination speed index; (d) emergence test; (e) emergence speed index; (f) electrical conductivity; and (g) accelerated aging. Genotype EVF102 seeds sized 8 mm, as classified by the densimetric table, showed the highest physiological quality, considering the germination, germination speed index, and emergence. Seeds of the genotype EVF103, sorted by size, exhibited no difference in physiological quality.

scholarly journals Physiological quality of castor bean seed genotypes stored at two temperatures

2019 ◽  
Vol 42 ◽  
pp. e43583
Author(s):  
Anailda Angélica Lana Drumond ◽  
Juliana de Fatima Sales ◽  
Jacson Zuchi ◽  
Gessimar Nunes Camelo ◽  
Moara Mariely Vinhais Souza
Keyword(s):  
Castor Bean ◽  
Seed Quality ◽  
Germination Rate ◽  
Accelerated Aging ◽  
High Lipid ◽  
Physiological Quality ◽  
Two Temperatures ◽  
Rate Of Emergence ◽  
Castor Seeds

Environment and storage time influence stored seed quality, especially for oilseeds such as castor beans because they have a high lipid content and are more prone to deterioration. This study evaluated the physiological quality of seeds from three castor bean genotypes stored at 10 and 20°C for 300 days. The experimental design was completely randomized, with 4 replications, in a 2 x 6 (2 temperatures x 6 storage periods) split-plot design. The seeds were placed in low-density polypropylene bags and stored in climatic chambers at 10 and 20°C, in which the temperature and relative humidity were registered. Physiological quality (germination, germination rate index, emergence, rate of emergence, electrical conductivity and accelerated aging) were evaluated at baseline and after 60, 120, 180, 240, and 300 days of storage. Castor seeds of genotype EVF 106 showed better physiological quality when stored at 10°C. Castor seeds of genotype EVF 701 could be stored at 10 and 20°C for 300 days. Castor seeds of genotype EVF 712 presented reduced physiological quality during their 300 days in storage, regardless of temperature.

scholarly journals Application of Trichoderma harzianum on the physiological quality of cowpea seeds

2021 ◽  
pp. 643-648
Author(s):  
Marcelo Laranjeira Pimentel ◽  
Henara Valéria Miranda Castro ◽  
Mike Kirixi Munduruku ◽  
Larissa Conceição Cunha Ponte ◽  
Deyvielen Maria Ramos Alves ◽  
...  
Keyword(s):  
Trichoderma Harzianum ◽  
Seed Treatment ◽  
Germination Percentage ◽  
Hypocotyl Length ◽  
Cowpea Seeds ◽  
Randomized Design ◽  
Germination Speed ◽  
Physiological Quality ◽  
Set Up

The use of fungi in seed treatment can improve the plant's physiological characteristics. The aim of this study was to evaluate the influence of the use of Trichoderma harzianum on the physiological quality of bean seeds. The experiment was set up and conducted in the forest seed laboratory of the Federal University of Western Para, in a randomized design, using 4 procedures on the basis of a colony forming unit (CFU): T1 (0 CFU), T2 (4 x 109 CFU), T3 (8 x 109 CFU) and T4 (12 x 109 CFU), with 5 repetitions. Germination percentage (G%), germination speed index (GSI), hypocotyl length (HL) and radicle length (RL) were evaluated as variables. The data were analyzed by variance analysis and the averages were compared using the Tukey test (p≤0.05), in addition to the regression analysis, using the Minitab© version 18 statistical software. There were differences between the germination percentage tests, in which T2 obtained 100% of germinated seeds, for GSI it was observed that T2 and T3 were equal and superior to the other treatments, while for RL T1 and T2 obtained the best results, however, for HL there were no statistical differences between treatments. T2 was more efficient in the physiological quality of seeds to germination percentage and germination speed index

scholarly journals Temperatures and periods of drying delay and quality of corn seeds harvested on the ears

2019 ◽  
Vol 41 (3) ◽  
pp. 336-343
Author(s):  
Everson Reis Carvalho ◽  
Victor Moss Francischini ◽  
Suemar Alexandre Gonçalves Avelar ◽  
Júlia Camargos da Costa
Keyword(s):  
Processing Unit ◽  
High Moisture Content ◽  
High Moisture ◽  
Seed Processing ◽  
Randomized Design ◽  
Delay Times ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Corn Hybrid

Abstract: Seeds harvested on the ears have high moisture content. On that account, this study aimed at evaluating the loss of physiological quality of corn seeds harvested on the ears, as a function of different drying-delay times. Hybrid corn ears were harvested at 31% moisture and then had their drying postponed for 0, 12, 24 and 36 h, while subjected to temperatures of 30, 40, 50 and 60 °C. The physiological quality was evaluated after 0, 4, 8 and 12 months of storage. A completely randomized design was employed, in a 4 x 4 x 4 factorial scheme, with four replications. In addition, a study was performed in a seed-processing unit, reporting the average waiting time before drying and the temperatures of all loads of a corn hybrid received at the facility. The physiological quality was not affected by temperatures below 40 °C, considering 36 h of waiting before drying. At 50 ºC during the drying delay, the germination was impaired 36 h afterward, and the vigor was compromised after 24 h, with the damage effects intensifying as the storage advanced. At the temperature of 60 ºC, the deficits in germination and vigor occurred within the first hours of drying delay.

scholarly journals Seed quality of rice cultivars stored in different environments

2014 ◽  
Vol 36 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Elizabeth Rosemeire Marques ◽  
Eduardo Fontes Araújo ◽  
Roberto Fontes Araújo ◽  
Sebastião Martins Filho ◽  
Plínio César Soares
Keyword(s):  
Seed Quality ◽  
Accelerated Aging ◽  
Storage Period ◽  
Rice Cultivars ◽  
Germination Test ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
And Storage

The objective of this study was to evaluate dormancy and physiological quality of seeds of rice cultivars during storage in different environments. After harvesting, the seeds of three rice cultivars (Seleta, Curinga and Relâmpago) were dried in the sun, to reach moisture content at around 13%. Then, they were packed in paper and stored in four environments: 5 ± 2 ºC / 70 ± 5% RH, 12 ± 2 ºC / 70 ± 5% RH, 18 ± 2 ºC / 65 ± 5% RH and in uncontrolled condition of temperature and relative humidity (natural). Physiological quality was evaluated at the beginning and at 3, 6, 9 and 12 months of storage by germination test, electrical conductivity, accelerated aging and sand emergence. The experiment was conducted in split plots in a completely randomized design with three replications. Environmental factor was applied in the plots, cultivars in the subplots and storage period in subplots. Cultivar Seleta showed higher dormancy, which was surpassed during storage regardless of environment conservation. In general, seeds stored in natural environment showed lower physiological quality. Only the seeds of cultivar Seleta, regardless of the environment, maintained germination above the minimum required for commercialization until six months of storage.

scholarly journals Physiological and phytosanitary potential of rocket seeds

2015 ◽  
Vol 45 (2) ◽  
pp. 200-205 ◽  
Author(s):  
Jucilayne Fernandes Vieira ◽  
Sandro de Oliveira ◽  
Zarela Casas Navarro Zanatta ◽  
Elisa Souza Lemes ◽  
Francisco Amaral Villela ◽  
...  
Keyword(s):  
Dry Matter ◽  
Saline Solution ◽  
Germination Rate ◽  
Accelerated Aging ◽  
Sanitary Condition ◽  
Randomized Design ◽  
Seed Analysis ◽  
Physiological Quality ◽  
Completely Randomized Design

The objective of this study was to evaluate the physiological and sanitary quality of seeds of rocket; the research was done at the Laboratory of Seed Analysis and greenhouse of the Department of Plant Science, Federal University of Pelotas (UFPel). Four lots of the cultivar "Antonella'' were tested for following features: initial and final moisture content, germination rate, first count of germination, accelerated aging with saline solution, dry matter contents, seedling shoot and root length, emergence speed index, emergence of seedlings in substrate, electrical conductivity and sanitary condition. A completely randomized design with four replications was used for all tests done and means were compared by Tukey test (P≤0.05). For all tests performed it was concluded that despite changes in the ranking of the best lots, there was agreement regarding the indication of the inferiority of the lot 3 in all tests and it was also observed that the incidence of fungi associated with seeds of rocket interfere with the physiological quality of the lots.

scholarly journals Physiological quality and seed storage potential of four soybean cultivars

2021 ◽  
Vol 10 (4) ◽  
pp. e7910413635
Author(s):  
Larissa Aparecida Giasson ◽  
Adriana Paula D’Agostini Contreiras-Rodrigues ◽  
Daniela Aparecida Dalla-Costa ◽  
Betania Brum de Bortolli ◽  
Aline Ferreira Coelho ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Storage Time ◽  
Accelerated Aging ◽  
Seed Storage ◽  
Soybean Seeds ◽  
Soybean Cultivars ◽  
Repeated Measures Analysis ◽  
Germination Speed ◽  
Physiological Quality

The objective of this study was to evaluate physiological seeds quality of four soybean cultivars during storage, under controlled and uncontrolled conditions. Seeds of Brasmax Lança IPRO, Brasmax Raio IPRO (está diferente do Material e Médtodos), Pioneer 95y52 and TMG 7062 IPRO cultivars were stored in controlled (20 ± 1.2 °C) and uncontrolled (producer's warehouse) environments and the following traits were assessed: percentage of germination (GERM), germination speed index (GSI), germination speed (GS) and accelerated aging (AA) at 0, 60, 120 and 180 days of storage. Covariance matrices structure of storage time was tested through repeated measures analysis, adopting a bifactorial model. Data were submitted to ANOVA (α=5%) and when the means presented significant differences, regression analysis and Scott-Knott test (α=5%) were performed. Differences in soybean seeds physiological quality are not related to storage environment. Lança cultivar was the most tolerant to storage, while Ray and TMG 7062 cultivars were more sensitive.

scholarly journals O GRAU DE UMIDADE NA COLHEITA E O SISTEMA DE SECAGEM SÃO DETERMINANTES PARA O VIGOR DE SEMENTES DE ARROZ

2021 ◽  
Vol 36 (1) ◽  
pp. 28-40
Author(s):  
Jaquelini Garcia ◽  
Cileide Maria Medeiros Coelho
Keyword(s):  
Moisture Content ◽  
Seed Viability ◽  
Mechanical Damage ◽  
Accelerated Aging ◽  
Seed Vigor ◽  
Rice Seed ◽  
Randomized Design ◽  
Physiological Quality ◽  
Drying System

O GRAU DE UMIDADE NA COLHEITA E O SISTEMA DE SECAGEM SÃO DETERMINANTES PARA O VIGOR DE SEMENTES DE ARROZ   JAQUELINI GARCIA1, CILEIDE MARIA MEDEIROS COELHO1   1Programa de Pós-graduação em Produção vegetal, Universidade do Estado de Santa Catarina, Avenida Luiz de Camões, 2090, Conta Dinheiro, 88520-000, Lages, SC, Brasil, [email protected], [email protected]   RESUMO: O grau de umidade na colheita e o sistema de secagem podem ser determinantes na qualidade das sementes produzidas. Neste trabalho foi avaliado se o sistema de secagem e o grau de umidade na colheita interferem na qualidade fisiológica das sementes de arroz. Foi realizado em delineamento inteiramente casualizado em esquema fatorial triplo. Foi utilizada seis cultivares produzidas no Alto Vale do Itajaí/SC na safra 2016/17 com grau de umidade na colheita igual ou superior a 17% (19,30 - 17,30%) e inferior a 17% (16,40 - 15,03%) (base úmida). As sementes foram submetidas aos sistemas de secagem estacionário e intermitente. Realizou-se testes de germinação, viabilidade, vigor pelo envelhecimento acelerado e frio. Sementes colhidas com grau de umidade ≥ 17% apresentaram maior vigor. A cultivar foi um fator de grande relevância na sensibilidade ao dano térmico e mecânico. O sistema de secagem não afetou a viabilidade das sementes, com exceção da cultivar SCS122 Miura que foi sensível a dano térmico e mecânico. A secagem estacionária comprometeu a qualidade fisiológica. Conclui-se que a secagem intermitente e a colheita com grau de umidade igual ou superior a 17%, mantém a qualidade fisiológica das cultivares SCSBRS Tio Taka, SCS122 Miura, SCS116 Satoru e SCS121 CL.   Palavras-chaves: Secagem estacionária, secagem intermitente, qualidade fisiológica.   THE DEGREE OF MOISTURE IN THE HARVEST AND THE DRYING SYSTEM ARE DETERMINANT FOR THE RICE SEED VIGOR   ABSTRACT: The degree of moisture at harvest and the drying system can determine the quality of the seeds produced. In this work, it was evaluated whether the drying system and the degree of moisture at harvest affect the physiological quality of rice seeds. It was conducted in a completely randomized design in a triple factorial scheme. Six cultivars produced in Alto Vale do Itajaí/SC in the 2016/17 crop were used, with moisture content at harvest equal or greater than 17% (19.30 – 17.30%) and less than 17% (16,40 - 15,03%) (wet basis). Seeds were submitted to stationary and intermittent drying systems. Tests of germination, viability, vigor by accelerated aging and cold were performed. Seeds harvested with moisture content ≥ 17% showed greater vigor. The cultivar was a factor of great relevance in the sensitivity to thermal and mechanical damage. The drying system did not affect seed viability, except for the cultivar SCS122 Miura, which was sensitive to thermal and mechanical damage. Stationary drying compromised physiological quality. It was concluded that intermittent drying and harvesting with moisture content equal or greater than 17% maintain the physiological quality of the SCSBRS Tio Taka, SCS122 Miura, SCS116 Satoru and SCS121 CL cultivars.   Keywords: Stationary drying, intermittent drying, physiological quality.

scholarly journals Germination of Echium plantagineum L. seeds submitted to dormancy overcoming and variations in temperature, light and depth of sowing

2017 ◽  
Vol 39 (3) ◽  
pp. 262-271 ◽  
Author(s):  
Rodrigo Roso ◽  
Ubirajara Russi Nunes ◽  
Juçara Terezinha Paranhos ◽  
Caren Alessandra Müller ◽  
Tiéle Stuker Fernandes ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Factorial Design ◽  
Accelerated Aging ◽  
Soil Surface ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Sowing Depth ◽  
Randomized Design ◽  
Physiological Quality

Abstract: The objective of this study was to evaluate methods of overcoming dormancy, light regimens, temperature and depth of sowing variations in the physiological quality of Echium plantagineum seeds. The diaspores (agglutinated fruits from the seeds) were submitted to treatments using accelerated aging, potassium nitrate and gibberellic acid to overcome dormancy. A 7 x 2 factorial design was used to evaluate the temperatures (5, 10, 15, 20, 25, 30 and 35 °C) and light regimens (presence or absence of light). A 6 x 2 factorial design was used for sowing depth (0, 1, 2, 3, 4 and 5 cm) and soil coverage (presence or absence of straw). In all experiments, a completely randomized design with four replicates of 50 diaspores was used. The main evaluations were germination, first germination count, germination speed index and emergence. The seeds showed dormancy, which was overcome by the immersion of the diaspores in potassium nitrate and gibberellic acid. The ideal temperature for germination was 20 °C, showing greater germination in the presence of light, considered as preferentially positively photoblastic. The highest germination percentage occurred when the diaspores were positioned on the soil surface in the presence of straw.

scholarly journals Physiological quality of popcorn seeds assessed by the accelerated aging test

2018 ◽  
Vol 40 (4) ◽  
pp. 428-434 ◽  
Author(s):  
Cristiane da Silva Rocha ◽  
Hugo César Rodrigues Moreira Catão ◽  
Franciele Caixeta ◽  
Heloisa Karoline Kavan ◽  
Talis Melo Claudino ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Moisture Content ◽  
Accelerated Aging ◽  
Seed Moisture Content ◽  
Randomized Design ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality ◽  
Consistent Information

Abstract: Despite the insufficient internal supply of popcorn kernel cultivars, the Brazilian production is continuously increasing. Therefore, searching for tests that offer fast results and reliable information on the physiological potential of the seeds is very important. The objective of this study was to assess the efficiency of the accelerated aging test, by using different times and exposure temperatures, for the evaluation of the physiological quality of popcorn seed lots. Popcorn seeds from three lots of the hybrid AP 8203 were used. For the initial characterization of the lots, the following tests were conducted: seed moisture content, first and final germination count, and field emergence. The accelerated aging test was performed in a 3x4x2 factorial scheme. After aging, the seeds were tested for moisture content, germination, and electrical conductivity. The experiment was carried out in a completely randomized design. The characteristic vigor was affected during aging, as evidenced by the increase in the amount of leachate detected by the electrical conductivity test. Seed lot 3 was most vigorous in the aging test conducted for 48 h at 45 °C. The accelerated aging test at 42 ºC for 48 h provides consistent information to differentiate seed lots of popcorn.

scholarly journals EVALUATION OF IRRIGATION LEVELS IN THE CASTOR BEAN (Ricinus communis L.) IN THE BRAZILIAN SEMIARID REGION

2013 ◽  
Vol 21 (5) ◽  
pp. 493-500
Author(s):  
Breno Rosa Neves ◽  
Marcelo Rocha Santos ◽  
Sérgio Luiz Rodrigues Donato
Keyword(s):  
Castor Bean ◽  
Agricultural Sector ◽  
Ricinus Communis ◽  
Raw Material ◽  
Growth And Yield ◽  
Semiarid Region ◽  
Federal Institute ◽  
Randomized Design ◽  
Ricinus Communis L ◽  
Irrigation Levels

There has been an increase in the search for forms of renewable energy with lo environmental impacts, of which biodiesel is highlighted. The castor bean (Ricinus communis L.) is a major raw material for the derivation of these biomass-based fuels. Due to the lack of information in literature regarding irrigation in castor bean crops in the semiarid region of Bahia, the aim of this study was to evaluate different irrigation levels on growth and yield of castor beans in the semiarid region of Bahia. The study was conducted in an experimental area of the agricultural sector of the Federal Institute of Education, Science and Technology Campus, Guanambi, Bahia, Brazil. The experiment was setup in a completely randomized design with 4x5 factorial scheme, consisting of four irrigation levels (T1: 100% ETc, T2: 80% of ETc, T3: 60% of ETc and T4: 40% of ETc, with drip irrigation), five evaluation dates (65, 80, 95, 110 and 126 day after sowing) and four replications. The reduction in irrigation did not cause differences in plant height, stem diameter and crown diameter of the castor bean cultivar Paraguaçu. Irrigation at 80% ETc showed to be more suitable, with increased yield and water use efficiency.

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