scholarly journals RESPOSTA GERMINATIVA DO FEIJÃO ARIGÓ E MANTEIGUINHA (Vinga unguicula L. Walp) SUBMETIDAS A CONDIÇÕES ESTRESSE SALINO

Nativa ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 165
Author(s):  
Kelly Nascimento Leite ◽  
Yasmin Cavalcante de Andrade ◽  
Kecy Dhones Monteiro Marques ◽  
André Luiz Melhorança Filho ◽  
Porfirio Ponciano de Oliveira Júnior ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Dry Matter ◽  
Good Alternative ◽  
Hypocotyl Growth ◽  
Total Period ◽  
Good Tolerance ◽  
Germination Time ◽  
Randomized Design ◽  
Mean Germination Time ◽  
The Mean

Esse trabalho teve o objetivo de avaliar a germinação e crescimento de plântula das sementes crioulas de feijão-caupi, (Vigna unguiculata (L.) Walp), variedades Manteguinha e Arigó, exposta a níveis crescentes de salinidade da região do vale do Juruá, Acre. O experimento foi conduzido em laboratório utilizando 10 tratamentos e quatro repetições distribuídos seguindo um delineamento inteiramente casualizado em esquema fatorial 2 x 5, duas variedades de feijão (Arigó e Manteguinha) e 5 níveis de salinidade, por um período total de 7 dias. Foi avaliado o índice de germinação, o tempo médio de germinação, crescimento do hipocótilo, crescimento da radícula, e matéria seca total. Os resultados mostraram que a germinação (IVG), hipocótilo (CH) e raiz (CR) são afetados com o aumento das concentrações salinas. O tempo médio de germinação para a variedade Arigó não sofreu alteração significativa com a presença dos sais na solução. A matéria seca do hipocótilo e raiz foram afetadas de maneira significativa somente para a variedade Arigó. A variedade Manteguinha apresentou boa tolerância à salinidade na germinação inicial, mostrando-se como uma boa alternativa para programas de seleção de obtenção de cultivares tolerantes ao estresse salino.Palavras-chave: feijão-caupi; salinidade; germinação. GERMINATION RESPONSE OF BEAN ARIGÓ AND MANTEGUINHA (Vigna unguiculata (L.) Walp) SUBMITTED TO SALT STRESS CONDITIONS ABSTRACT: The objective of this work was to evaluate the germination and seedling growth of the Creole seeds of the Juruá Valley, Acre, bean caupi (Vigna unguiculata (L.) Walp) varieties Manteguinha and Arigó, exposed to increasing levels of salinity. The experiment was conducted in a laboratory using 10 treatments and four replicates distributed in a completely randomized design in a 2 x 5 factorial scheme, two varieties of bean (Arigó and Manteguinha) and 5 levels of salinity, for a total period of 7 days. The germination index, mean germination time, hypocotyl growth, root growth, and total dry matter were evaluated. The results showed that germination (IVG), hypocotyl (CH) and root (CR) are affected with the increased salt concentrations. The mean germination time for the Arigó variety did not change significantly with the presence of the salts in the solution. The dry matter of the hypocotyl and root is affected only significantly for the arthropod variety. The variety Manteguinha presented good tolerance to the salinity in the initial germination. The butterbean variety stood out best by showing a good alternative for selection programs for obtaining salt tolerant cultivars.Keywords: cowpea beans; salinity; germination.

scholarly journals Salinity tolerance at germination of some main cultivated cowpea (Vigna unguiculata) genotypes from Western Cameroon

2017 ◽  
Vol 6 (06) ◽  
pp. 1634
Author(s):  
Ebeny Leonny Tsague ◽  
Eric Bertrand Kouam* ◽  
Christopher Mubeteneh Tankou
Keyword(s):  
Salt Stress ◽  
Vigna Unguiculata ◽  
Germination Percentage ◽  
Randomized Design ◽  
Nacl Concentration ◽  
Mean Germination Time ◽  
The Mean ◽  
Coefficient Of Velocity ◽  
Positive Correlations ◽  
Osmotic Potentials

This study investigates the effect of salt (NaCl) on the germination of seeds of 10 genotypes of cowpea (Vigna unguiculata). The experiment carried out on petri dishes was done using a completely randomized design comprising three replications. The germination of the cultivars was studied using distilled water as control and under osmotic potentials of 50, 100, 150 and 200mM NaCl. The results indicated that the Mean Germination Time (MGT), Time to 50% Germination (T50), Germination Index (GI), Coefficient of Velocity of Germination (CVG), and Germination Percentage (GP), varied between 2.33 and 5.51 days; 2.83 and 14.87 days; 16.66 and 1.63; 0.53 and 0.11; 87.11 and 27.98% respectively. The variables GI, CVG and GP tended to decrease with increasing NaCl concentration while MGT and T50 tended to increase with increasing salt concentrations. For all the germination variables, significant differences at 0.001 probability levels were found among salinity treatments, cowpea genotypes and their interaction. Four genotypes (KEB-CP118, OU59A, OU100 and ICV12) were tolerant to salt stress and performed well under salinity conditions. Four other genotypes were found to be moderately tolerant (ET11, NO1036, MTA22 and KEB-CP009) and two genotypes (KEB-CP098 and NO193) were susceptible to salt stress and were most affected by salinity. At 0.001 probability level, positive correlations were observed between GP and GI (r = 0.792); GP and CVG (r = 0.774); GI and CVG (r = 0.955) and negative correlations were observed between GP and T50 (r = - 0.845); GI and MGT (r = - 0.894); CVG and MGT (r = - 0.895).

scholarly journals THE GERMINATION OF INDOGOFERA ZOLLINGERIANA BY SOAKING IN LIQUID SMOKE WITH DIFFERENT CONCENTRATIONS

2021 ◽  
Vol 3 (1) ◽  
pp. 36-44
Author(s):  
Yelly Magdalena Mulik ◽  
Stormy Vertygo ◽  
Vivin E. Se’u ◽  
Basry Y. Tang
Keyword(s):  
Germination Rate ◽  
Anova Analysis ◽  
Germination Time ◽  
Liquid Smoke ◽  
Time Treatment ◽  
Randomized Design ◽  
Mean Germination Time ◽  
The Mean ◽  
Indigofera Zollingeriana ◽  
Completely Randomized Design

This study aimed to evaluate the effect of immersion using liquid smoke with different concentrations on the germination viability of Indigofera zollingeriana. The design used was a completely randomized design with 4 treatments: A0 = 0% liquid smoke, A20 = 20% liquid smoke, A40 = 40% liquid smoke, A100 = 100% liquid smoke, each treatment with 4 replications. The parameters observed were the germination viability, mean germination time, and mean daily germination. ANOVA analysis showed that the treatment had a significant effect on germination viability but insignificant on the germination rate and mean germination time. Treatment A0 was the treatment with the highest germination viability (75%), but the highest germination rate (0.34 cm/day) was in treatment A20. The higher the concentration of liquid smoke, the lower the germination viability, the germination rate and the mean germination time.

scholarly journals Physiological potential of stylosanthes cv. Campo Grande seeds coated with different materials

2015 ◽  
Vol 37 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Priscilla Brites Xavier ◽  
Henrique Duarte Vieira ◽  
Cynthia Pires Guimarães
Keyword(s):  
Activated Carbon ◽  
Calcium Silicate ◽  
Dry Matter ◽  
Seed Quality ◽  
Maximum Diameter ◽  
Minimum Diameter ◽  
Germination Time ◽  
Germination Speed ◽  
Mean Germination Time ◽  
Limestone Sand

The aim of this study was to assess the effect of different coatings on the physiological potential of stylosanthes cv. Campo Grande seeds. The treatments were: uncoated seeds; limestone + PVA glue; limestone + sand + PVA glue; limestone + activated carbon + PVA glue; calcium silicate + PVA glue; calcium silicate + sand + PVA glue; calcium silicate + activated carbon + PVA glue. Posteriorly, the seeds were analyzed for water content (WC), maximum diameter (MAD) and minimum diameter (MID), thousand seed weight (TSW), germination test, germination speed index (GSI), mean germination time (MGT), emergence, emergence speed index (ESI), mean emergence time (MET), shoot and root length, fresh and dry matter of shoot and root. The coating increased the TSW, MAD and MID and decreased its WC. The treatments comprising limestone + PVA glue and limestone + sand + PVA glue increased the germination time, but none of the treatments negatively affected the physiological seed quality. Treatment with calcium silicate + PVA glue was outstanding for germination speed index and fresh and dry matter of shoot and root in the stylosanthes cv. Campo Grande seeds coating.

scholarly journals Sensitivity of Seed Germination to Salt Stress in Teff [Eragrostis tef (Zucc.) Trotter]

2019 ◽  
Vol 76 (1) ◽  
pp. 91
Author(s):  
Panayiota PAPASTYLIANOU ◽  
Ilias TRAVLOS ◽  
Ioannis ROUSSIS ◽  
Dimitrios BILALIS
Keyword(s):  
Salt Stress ◽  
Agricultural Development ◽  
Animal Feed ◽  
Moisture Stress ◽  
Germination Percentage ◽  
Limiting Factors ◽  
Eragrostis Tef ◽  
Germination Time ◽  
Randomized Design ◽  
Mean Germination Time

Teff is an annual grass originated in Ethiopia, grown for both human food and animal feed. Salinity and moisture stress are the main limiting factors of agricultural development on arid and semi-arid regions. The aim of this study was to investigate the effect of salinity due to NaCl on germination of teff. A set of experiments was conducted under a completely randomized design with four replications of 200 seeds at two different suboptimal germination temperatures (15 and 25 °C) in the dark for 10 days. In order to create salt stress conditions during the germination process, seven solutions were used (0 as control, 80, 160, 240 and 320, 400 and 480 mM NaCl). The germination performance was evaluated by final germination percentage and mean germination time. The presence of NaCl reduced germination, especially above 240 mM for 15 °C and 400 mM for 25 °C. The mean germination time increased with higher NaCl levels.

scholarly journals ASSESSMENT OF PERIODS OF SAND PRIMING AND HYDRO-PRIMING ON THE GERMINATION OF AFRICAN EBONY (Diospyros mespiliformis Hochst)

2017 ◽  
Vol 17 (1) ◽  
pp. 83-90
Author(s):  
D. O. ADELANI ◽  
R. A. SULEIMAN ◽  
U. U. EMEGHARA
Keyword(s):  
Tree Species ◽  
Mass Production ◽  
Percentage Germination ◽  
Germination Time ◽  
Randomized Design ◽  
Breaking Dormancy ◽  
Mean Germination Time ◽  
Completely Randomized Design ◽  
Agro Forestry

Diospyros mespiliformis (Hochst) is a multipurpose, agro-forestry tree species with diverse environmental and ecological significances. However, low percentage germination associated with its seeds has limited its domestication. To overcome this challenge, there is need to adopt cheap, fast, safe, natural and adoptable physiological techniques such as sand priming and hydro-priming. There is paucity of quantified information on natural and safe methods of relieving dormancy as sand priming and hydro-priming. Most of methods of breaking dormancy as use of acid are not simple, safe and adoptable by farmers who practices agro-forestry. In the light of this, these experiments were conducted to assess the periods of sand priming (0, 2, 4, 6 and 8 weeks) and hydro-priming (0, 2, 4, 6 and 8 weeks) on the germination of D. mespiliformis. Both experiments were laid down in completely randomized design with four replicates. Mean germination times were calculated, and result revealed that a significant increase in percentage germination was recorded with increasing periods of exposing seeds to sand priming up to four weeks. The percentage germination ranged between 28%-93.25% for control (0) and four weeks sand priming respectively. Least value of 8.92 day was recorded for mean germination time of control (0 sand priming). A significant increase in percentage germination was recorded with increasing hours of hydro-priming up to 24 hours. The percentage germination was ranged between 25% - 100% for control (0) hour to 24 hours. Highest germination percentages were recorded in seeds subjected to sand priming for 4weeks (93.25%) and those hydro-primed for 24hours (100%). These results are recommended for mass production of D. mespiliformis in agro-forestry nurseries.  

scholarly journals Consumption of dry matter observed and predicted by the nutritional systems in senepol bulls kept in confinement

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Aline Maria Soares Ferreira ◽  
Simone Pedro da Silva ◽  
Carina Ubirajara de Faria ◽  
Egleu Diomedes Marinho Mendes ◽  
Ester Ferreira Felipe
Keyword(s):  
Prediction Error ◽  
Dry Matter ◽  
Bos Taurus ◽  
Electronic System ◽  
Mean Square ◽  
Simple Linear Regression ◽  
Initial Weight ◽  
Randomized Design ◽  
The Mean ◽  
Completely Randomized Design

The objective was to compare the dry matter consumption (CMS) observed, through the use of the GrowSafe® electronic system, with that predicted by the BR-Corte (2010 and 2016) and NRC (2000) nutritional systems in confined Senepol bulls. To this end, 24 Senepol Bulls were used in a completely randomized design, uncastrated with an average initial weight of 368 kg and 16 months of age. The evaluation of the accuracy and approximation of the CMS estimates by the nutritional systems was adjusted by the simple linear regression model and the decomposition of the mean square of the prediction error (QMEP). The mean CMS observed was 10.33 kg.day-1, higher than the values predicted by the nutritional systems, in which the values predicted by the NRC (2000) and BR-Corte 2010 and 2016 underestimated the CMS by 29.62, 6.19 and 2.03%, respectively. The verification of QMEP and its decomposition made it possible to infer the proximity of the values predicted by the BR-Corte 2010 and 2016 models and the values observed, which presented a better adjustment in relation to the NRC. Surprisingly the values predicted by the NRC, created from a database with Bos taurus animals, showed greater distance from the values predicted and observed, and it was expected greater accuracy of the NRC models for this category and animal breed. It is concluded that the BR-Corte 2016 was the most appropriate model to estimate the CMS of confined Senepol bulls.

scholarly journals Sensitivity of Seed Germination to Temperature and Light in Helichrysum amorginum

2020 ◽  
Vol 77 (1) ◽  
pp. 7
Author(s):  
Sofia ARGYRIOU ◽  
Panayiota PAPASTYLIANOU ◽  
George STAVROPOULOS ◽  
Angeliki KOUSTA ◽  
Ioanna KAKABOUKI ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Survival ◽  
Germination Percentage ◽  
Effect Of Temperature ◽  
Germination Time ◽  
Randomized Design ◽  
Perennial Shrub ◽  
Mean Germination Time ◽  
Lower Temperature ◽  
Seed Propagation

Helichrysum amorginum is a perennial shrub, endemic on the Greek island of Amorgos and used for medicinal, cosmetic and ornamental purposes. Information concerning germination behavior and seedling survival is considered essential for the establishment and cultivation of wild species. The objective of this study was to investigate the effect of temperature and light on germination of Helichrysum amorginum seeds. A set of experiments was conducted under completely randomized design with four replications of 200 seeds at three different suboptimal germination temperatures (15, 20 and 25°C) in light and dark conditions for 10 days. Seed material was collected from two different fields of the island (Aegiali and Katapola). The germination performance was evaluated by final germination percentage and mean germination time. The effect of temperature on seed germination percentage and mean germination time was significant in all cases. The presence of light enhanced germination, especially at the optimum temperature of 20°C. In most cases the mean germination time increased at the lower temperature of 15°C. Seeds from Aegiali exhibited higher germination ability than the seed lot from Katapola. Knowledge of seed germination behaviour is of major importance in order to establish effective protocols for seed propagation in Helichrysum amorginum.

Competition studies in diploid and tetraploid varieties of Lolium perenne: 1. The influence of density and proportion of sowing

1977 ◽  
Vol 88 (2) ◽  
pp. 405-410 ◽  
Author(s):  
J. Norrington-Davies ◽  
J. H. Harries
Keyword(s):  
Binary Mixture ◽  
Lolium Perenne ◽  
Significant Variation ◽  
Germination Percentage ◽  
Pure Stand ◽  
Germination Inhibitors ◽  
Germination Time ◽  
Mean Germination Time ◽  
The Mean ◽  
Seed Coats

SUMMARYTwo varieties of Lolium perenne, the diploid Hora and the tetraploid Terhoy were sown either as a pure stand or as a binary mixture on to the surface of multipots filled with a standard John Innes compost. Density of sowing was varied over the range of 16, 24, 36, 50 and 100 seeds/pot. There were four replicates. The pattern of germination was followed over a period of 14 days when it was found that (i) the varieties did not differ in their germination when grown alone, but in mixtures the diploid was slower to germinate than the tetraploid, (ii) as the density of sowing per pot was increased, the mean germination time (MGT) was increased, and (iii) the final germination of both verities decreased with increasing density.In a second experiment the same procedures were followed as before but seed of each variety was sown either as a pure stand or in a mixture of varying proportion as follows: 100:0, 75:25, 50:50, 25:75, 0:100.The results showed that (i) the diploid had the fastest MGT whilst the mixture values showed no significant variation, and (ii) the final germination percentage of the diploid decreased relative to its pure stand value as its proportion in mixtures decreased, whilst the tetraploid under the same circumstances increased relative to its pure stand value.It is suggested that differences such as those found could be explained by the presence of germination inhibitors in the seed coats of the two ryegrass varieties.

scholarly journals Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
J.M.L. AZEVEDO ◽  
C.G.G. SANTOS ◽  
C.S. CAIRES ◽  
J.C. ARAÚJO NETO ◽  
R.C. SOUZA
Keyword(s):  
Moisture Content ◽  
Germination Rate ◽  
Germination Percentage ◽  
Percentage Germination ◽  
Essential Characteristic ◽  
Germination Time ◽  
Randomized Design ◽  
Different Temperatures ◽  
Mean Germination Time ◽  
Completely Randomized Design

ABSTRACT: The goal of this work was to characterize morphometrically diaspores from three species of mistletoes (Passovia pyrifolia, Struthanthus marginatus e Phoradendron mucronatum), as well as to study its germination behavior according to temperature and luminosity. In germination tests, the completely randomized design was used, in factor scheme 4 x 2, with 4 replications of 15 diaspores. The factors for the first test were different temperatures and two diaspore conditions (intact and without epicarp). In the second test, factors were different light qualities and two diaspore conditions. The analyzed variables were: germination percentage, germination rate index (GRI) and mean germination time (MGT). Mistletoe’s diaspores present an elliptic shape with viscin layer, an essential characteristic for the dispersion of the species. In addition to this, they present a distinction as for the moisture content when compared to the Loranthaceae and Viscaceae, where the latter presents the highest content. Germination is greater at the alternated temperature of 20-30 oC for P. pyrifolia and P. mucronatum diaspores and 20 oC for S. marginatus. Luminosity interfered in the germination of P. mucronatum and S. marginatus but did not influence P. pyrifolia. The diaspore condition influenced the germination of the three studied species, observing a significant increase in their germination when the epicarp was removed. Temperature and luminosity interfere directly in the GRI and MGT of the three mistletoes species.

scholarly journals Effect of winter wheat (cv. Jana) seed ageing on its viability and vigour

2014 ◽  
Vol 52 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Eugeniusz Sójka ◽  
Riad Zaidan
Keyword(s):  
Oxidative Phosphorylation ◽  
Winter Wheat ◽  
Respiratory Activity ◽  
Germination Test ◽  
Seed Vigour ◽  
Germination Time ◽  
Seed Ageing ◽  
Mean Germination Time ◽  
Biogenesis Of Mitochondria ◽  
The Mean

Viability and vigour of freshly collected 1, 2 and 3 years old seeds of the winter wheat cv. Jana were determined, on the base of the rate of germination, germinative capacity and the mean germination time, as well as the length of the shoot after 4, 7 and 10 days of the germination test. The intensity of respiration of whole caryopses, of isolated embryos and of the mitochondria was also measured. It was shown that the seed vigour and viability decreases with ageing. In seeds stored over longer periods the respiratory activity decreases as consequence of disturbance of the biogenesis of mitochondria, decline of oxidative phosphorylation and a decrease of the ability to oxidize the respiratory substrate.

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