scholarly journals Physiological quality of seed and seedling performance of crambe genotypes under water stress

2017 ◽  
Vol 21 (3) ◽  
pp. 175-179 ◽  
Author(s):  
Fernando H. B. Machado ◽  
Andréia M. S. de S. David ◽  
Lucas V. S. Cangussú ◽  
Josiane C. Figueiredo ◽  
Hugo T. R. Amaro
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
And Performance ◽  
Osmotic Agents ◽  
Polyethylene Glycol 6000 ◽  
Osmotic Potentials

ABSTRACT Water stress is a condition that causes physiological changes in different species and even genotypes of the same species. One of the osmotic agents most used to simulate this condition is polyethylene glycol 6000. The aim of this study was to evaluate the effects of water stress on the physiological quality of seeds and performance of seedlings of crambe genotypes. A completely randomized design was used, in a factorial scheme with two genotypes (one cultivar and one line) and five osmotic potentials simulated with aqueous solutions of polyethylene glycol 6000 (control = 0, -0.25, -0.50, -1.0, -1.50 MPa), with four replicates of 50 seeds per treatment. The effects of the treatments were evaluated by means of germination, first count, germination speed index and fresh and dry matter of seedlings. The physiological quality of seeds and the performance of crambe seedlings are negatively affected under water stress from -0.25 MPa on. Seeds of the genotype FMSCR 1101 have greater tolerance to drought stress, regardless of the osmotic potential used.

scholarly journals Germination of cotton cultivar seeds under water stress induced by polyethyleneglycol-6000

2011 ◽  
Vol 68 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Carlos Henrique Salvino Gadelha Meneses ◽  
Riselane de Lucena Alcântara Bruno ◽  
Pedro Dantas Fernandes ◽  
Walter Esfrain Pereira ◽  
Leonardo Henrique Guedes de Morais Lima ◽  
...  
Keyword(s):  
Water Stress ◽  
Seed Viability ◽  
Accelerated Aging ◽  
Germination Percentage ◽  
Randomized Design ◽  
Physiological Quality ◽  
Differential Viability ◽  
Osmotic Potentials ◽  
Cotton Cultivar

The physiological quality of cotton cultivar seeds (Gossypium hirsutum var. latifolium L.) was evaluated in laboratory by the simulation of water potentials with polyethyleneglycol-6000 (0.0; -0.2; -0.4; -0.6; -0.8 and -1.0 MPa), at 25ºC using germitest paper as substrate. A completely randomized design in a 4 × 6 factorial scheme with four replications of 50 seeds each was used. The studied variables were: germination percentage, first count of germination, germination velocity index, accelerated aging in water, electrical conductivity, humidity, vigor classification, radicle length and radicle/shoot length ratio. The effect of water stress on seed viability and on plantlet vigor was severe at potentials below -0.4 MPa. The 'CNPA 187 8H' cultivar was the least sensitive to the tested osmotic potentials, both in terms of germination and of vigor. The 'BRS-201' cultivar was mostly affected by the viability and vigor tests under water deficit conditions. Differential viability and vigor between cultivars were observed under the water stress levels.

scholarly journals Salicylic acid in the physiological priming of onion seeds subjected to water and salt stresses

2019 ◽  
Vol 23 (12) ◽  
pp. 919-924 ◽  
Author(s):  
José E. S. B. da Silva ◽  
Emanoela P. de Paiva ◽  
Moadir de S. Leite ◽  
Salvador B. Torres ◽  
Maria L. de Souza Neta ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Salt Stress ◽  
Water Stress ◽  
Dry Matter Accumulation ◽  
Randomized Design ◽  
Allium Cepa L ◽  
Onion Cultivar ◽  
Completely Randomized Design ◽  
Polyethylene Glycol 6000 ◽  
Osmotic Potentials

ABSTRACT This study aimed to evaluate the effect of physiological priming with salicylic acid on the mitigation of water and salt stresses on onion (Allium cepa L.) seeds. For this, seeds of onion, cultivar IPA 11, were soaked in salicylic acid solution (50 µM) for 24 h and placed to germinate at different water and saline potentials. For water stress, the experiment was conducted in a completely randomized design, in a 2 x 5 factorial scheme (salicylic acid with 0 and 50 µM and osmotic potentials of 0, -0.1, -0.2, -0.3, -0.4 MPa induced by polyethylene glycol 6000), with four repetitions of 50 seeds per plot. In salt stress, the adopted experimental design was completely randomized, with treatments distributed in a 2 x 4 factorial scheme (salicylic acid at concentrations of 0 and 50 µM and the osmotic potentials of 0, -0.3, -0.6 and -0.9 MPa induced by NaCl), in four repetitions of 50 seeds. For both experiments, germination, growth and accumulation of organic solutes were evaluated. Salicylic acid did not stimulate the germination of onion seeds in the absence of stress, but the application of 50 µM of salicylic acid increased the germination speed, growth and dry matter accumulation under conditions of water and salt stress. Onion plants were efficient in performing osmotic adjustment up to the potentials of -0.2 MPa induced by PEG 6000 under water stress and of -0.4 MPa induced by NaCl under salt stress.

scholarly journals Methods for priming maize seeds

2016 ◽  
Vol 38 (2) ◽  
pp. 148-154 ◽  
Author(s):  
Dryelle Sifuentes Pallaoro ◽  
Elisangela Clarete Camili ◽  
Sebastião Carneiro Guimarães ◽  
Maria Cristina de Figueiredo e Albuquerque
Keyword(s):  
Polyethylene Glycol ◽  
Cold Test ◽  
Dry Mass ◽  
Maize Seeds ◽  
Water Potentials ◽  
Randomized Design ◽  
Vigor Index ◽  
Completely Randomized Design ◽  
Polyethylene Glycol 6000

Abstract: This study aimed to evaluated different methodologies and water potentials for priming of maize seeds, in order to increase vigor. The experiment was carried out following a completely randomized design, in a factorial scheme 4x3+1, with four water potentials (0.0, -0.4, -0.8 and -1.2 MPa), three priming methods (immersion in non-aerated solution, immersion in aerated solution, paper roll) and a control. After priming, the seeds were dried and evaluated for water content, percentage and first germination count, seedlings length and dry mass, cold test and vigor index. The water potential recommended for priming maize seeds, in polyethylene glycol 6000 is -0.4 MPa for 24 hours. The priming procedures in towel paper rolls improve the quality of maize seeds.

scholarly journals Saline stress and temperatures on germination and vigor of Piptadenia moniliformis Benth. Seeds

2016 ◽  
Vol 20 (7) ◽  
pp. 649-653 ◽  
Author(s):  
Francisco E. C. B. Pereira ◽  
Sebastião Medeiros Filho ◽  
Salvador B. Torres ◽  
Cibele C. Martins ◽  
Selma F. de Brito
Keyword(s):  
Dry Matter ◽  
Cultural Practices ◽  
Germination Percentage ◽  
Saline Stress ◽  
Randomized Design ◽  
Root And Shoot Length ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Osmotic Potentials

ABSTRACT The knowledge concerning the physiology of germination in saline areas may contribute to the development of more efficient cultural practices and adequate choice of planting areas. Thus, the objective of this study was to evaluate the effects of saline and temperature stress on germination and vigor of Piptadenia moniliformis (a species known in Brazil as "catanduva") seeds. The treatments were distributed according to a completely randomized design in accordance with a 3 x 6 factorial arrangement (temperature x osmotic potential), with four replicates of 25 seeds each. The seeds were put to germinate at constant temperatures of 25, 30, and 35 °C on paper towel moistened in distilled water (0.0) and NaCl solutions at 0.2, 0.4, 0.6, 0.8 and 1.0 MPa. The results were evaluated in terms of germination percentage and germination speed index, seedling (root and shoot) length, and total dry matter. P. moniliformis seeds were able to germinate under temperatures of 25 and 30 °C and tolerate osmotic potentials of up to -0.6 MPa; from this point on, there is progressive decrease in the physiological quality of seedlings.

scholarly journals Size and vigor of Anadenanthera colubrina (Vell.) Brenan seeds harvested in Caatinga areas

2017 ◽  
Vol 39 (4) ◽  
pp. 363-373 ◽  
Author(s):  
Jaciara de Souza Bispo ◽  
Danielle Carolina Campos da Costa ◽  
Samara Elizabeth Vieira Gomes ◽  
Gilmara Moreira de Oliveira ◽  
Janete Rodrigues Matias ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dry Matter ◽  
Folk Medicine ◽  
Germination Percentage ◽  
Climate Variations ◽  
Randomized Design ◽  
Mother Plants ◽  
Physiological Quality ◽  
Completely Randomized Design

Abstract: Angico is a species found in several environments in Brazil, with several applications. It is used in the timber industry and mainly in folk medicine. In order to verify a variation in the biometric characteristics and the quality of seeds from different mother-plants in different harvesting years, the following variables were studied: moisture content, diameter, density, electrical conductivity, fresh and dry matter of seedlings, germination percentage and kinetics, in a completely randomized design with a 2x3 factorial arrangement (lots x size). The obtained results showed that angico seeds from different lots showed different physiological quality, possibly due to the climate variations to which mother-plants were submitted in the different years. Seed size directly interferes with seedling growth under both controlled and greenhouse conditions, and it can be used as a vigor indicator for angico seeds.

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 PHYSIOLOGICAL QUALITY OF Brachiaria brizantha SEEDS TREATED WITH FUNGICIDE AND INSECTICIDE

2018 ◽  
Vol 31 (3) ◽  
pp. 651-656
Author(s):  
ERIC FABIANO SERAGUZI ◽  
CARLOS HENRIQUE QUEIROZ REGO ◽  
FERNANDA BRITO CARDOSO ◽  
ANA CARINA DA SILVA CÂNDIDO ◽  
CHARLINE ZARATIN ALVES
Keyword(s):  
Root Development ◽  
Dry Mass ◽  
Brachiaria Brizantha ◽  
Thiophanate Methyl ◽  
Physiological Characterization ◽  
Randomized Design ◽  
Phytotoxic Effect ◽  
Physiological Quality ◽  
Completely Randomized Design

ABSTRACT This study aimed to evaluate the effects of chemical treatment of seeds with fungicide and insecticide on the seed physiological quality of Brachiaria brizantha cultivar MG5. Two experiments with four replicates were carried out in a completely randomized design. In the first experiment, the seeds were treated with the fungicide pyraclostrobin + fipronil + thiophanate-methyl and in the second, with the insecticide thiamethoxam, both at doses of 0, 150, 300, 450, and 600 mL of commercial product (CP)/100 kg of seeds. Physiological characterization was done on the basis of the first germination count, germination (%), emergence (%), emergence speed index, and length and dry mass of shoot and root. The treatment of B. brizantha seeds with the fungicide pyraclostrobin + fipronil + thiophanate-methyl benefits the physiological quality of seeds, improving germination and root development, with no phytotoxic effect up to the dose of 600 mL of CP/100 kg of seeds. The insecticide thiamethoxam has a biostimulating effect on B. brizantha cultivar MG5 up to the dose of 270 mL of CP/100 kg of seeds, but is phytotoxic in larger doses.

scholarly journals Physiological quality of osmoprimed gherkin seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 368-373 ◽  
Author(s):  
Rodrigo de Góes Esperon Reis ◽  
Humberto Pereira da Silva ◽  
José Maria Gomes Neves ◽  
Renato Mendes Guimarães
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Initial Profile ◽  
Randomized Design ◽  
Physiological Quality ◽  
Osmotic Potentials

It was aimed to verify the effect of different methodologies of osmopriming on physiological quality of gherkin seeds. Prior, it has been characterized the initial profile of the gherkin seeds. Then, the seeds were osmoprimed in gerboxes containing two blotter papers wetted with osmotic solutions in a volume equal to three times the paper dry weight and kept in BOD at 15 °C. After the priming, the seeds were dried at room temperature for 48 hours. Then, the following variables were evaluated: seeds moisture content, percentage of germination, percentage of emergence, emergence speed index and electrical conductivity. The analyses of variances were realized according to a randomized design in a factorial scheme 3 x 2 x 4: three solutes (polyetilene glycol 6000 - PEG, potassium nitrate - KNO3 and PEG + KNO3), two osmotic potentials (-0.55 and -1.10 MPa) and four times of priming (24, 48, 72 and 96 hours), followed by analyses of regression. It is concluded that the priming has no effect on germination and affects positively the vigor of the gherkin seeds lots; osmopriming with potassium nitrate is effective in improving the physiological quality of gherkin seeds lot.

scholarly journals Size, imbibition, and viability of seeds of two creole melon (Cucumis melo L.) from the state of Guerrero, Mexico

2021 ◽  
Vol 13 (12) ◽  
Author(s):  
José L. Escobar-Álvarez ◽  
Omar Ramírez-Reynoso ◽  
Paulino Sánchez-Santillán ◽  
Rocío Cuellar-Olalde ◽  
Teolincacíhuatl Romero-Rosales ◽  
...  
Keyword(s):  
Cucumis Melo ◽  
Positive Association ◽  
Costa Chica ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Student’S T ◽  
Melon Seeds ◽  
Cucumis Melo L

Objective: To determine the physical and physiological characteristics of Creole melon seeds from the Costa Chica ofGuerrero.Design/Methodology/Approach: It was established under a completely randomized design, and Student’s t-tests (a=0.05) and correlation with Pearson’s test were performed. Viability and imbibition were carried out using the methodologies described by the International Seed Testing Association (ISTA).Results: Creole seeds of the two varieties presented a significant statistical difference (95% confidence level) in the physical quality variables. The imbibition ended at 18 and 32 h in V2 and V1, respectively, after being submerged in water. The humidity percentage was higher in V1 (7.19); while, V2 presented a higher percentage of germination and viability (96 and 90%, respectively). There is a positive association between the humidity and the physical dimensions of the seed and the germination and viability (r2=0.954) that is highly significant (P=0.003).Study Limitations/Implications: Morphological and taxonomic classification studies of the Creole genotypes of the Costa Chica region of Guerrero are required.Findings/Conclusions: There was a positive correlation between the physical and physiological quality of the Creole melon seeds.

scholarly journals Physiological quality of osmoprimed Eremanthus erythropappus (D.C.) MacLeish seeds

2020 ◽  
Vol 13 (5) ◽  
pp. 18
Author(s):  
A. M. S. Oliveira ◽  
A. A. Silva ◽  
M. C. Vasconcelos ◽  
J. A. A. Granja ◽  
J. M. R. Faria ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Germination Rate ◽  
Seed Priming ◽  
Potassium Nitrate ◽  
The Other ◽  
Other Substances ◽  
Physiological Quality ◽  
Glycol Solution ◽  
Polyethylene Glycol 6000

Physiological conditioning is a technique that consists in controlling the speed of water uptake by seeds, with osmotic solutions, aiming to improve their quality, reducing time and increasing germination rate. Eremanthus erythropappus (D.C.) MacLeish seeds were subjected to priming with polyethylene glycol 6000 (PEG), potassium nitrate (KNO3) and the combination of the two at the concentrations of 0.4; -0.8; -1.0; -1.2 and -1.4 MPa for four, six and eight days. Germination, germination speed index (GSI), emergence, emergence speed index (ESI) and expression of superoxide dismutase (SOD), catalase (CAT) and peroxidase (PO) enzymes were assessed. E. erythropappus seed priming in polyethylene glycol solution with potentials between -0.8 MPa and -1.4 MPa is not satisfactory because it adversely affects germination and reduces the activity of peroxidase and catalase enzymes. The other substances were not significant so there is a need for further research with other substances and / or concentrations

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