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 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 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 Seed quality response of Urochloa humidicola cv. Llanero to drying surfaces and environments1

2018 ◽  
Vol 48 (3) ◽  
pp. 306-315
Author(s):  
Alan Mario Zuffo ◽  
Joacir Mario Zuffo Júnior ◽  
Everton Vinicius Zambiazzi ◽  
Fábio Steiner
Keyword(s):  
Seed Quality ◽  
Germination Rate ◽  
Seed Storage ◽  
Brachiaria Humidicola ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Quality Response ◽  
And Storage

ABSTRACT The drying process and storage may interfere in the quality of creeping signalgrass seeds [Urochloa humidicola (Rendle.) Morrone & Zuloago, syn. Brachiaria humidicola (Rendle.) Schweick.]. This study aimed to evaluate the physical, physiological and sanitary quality of creeping signalgrass cv. Llanero seeds submitted to drying surfaces and environments and stored for two periods (1 and 8 months). The experiment was arranged in a completely randomized design, in a 4 × 2 × 2 + 2 factorial arrangement, with four drying surfaces (soil, asphalt, concrete and ceramic floor), two drying environments (seeds exposed to the sun or shade), two seed storage periods (1 and 8 months) and two additional treatments with drying in paper bags under laboratory conditions (control) and stored for 1 or 8 months, with four replicates. The water content, viability by the tetrazolium test, electrical conductivity, germination rate, germination rate index and seed sanitary quality were measured. Drying at full sun impaired the physiological quality of the seeds due to the high temperatures (46.8-51.0 ºC) of the drying surface; however, reduced the incidence of pathogens. The drying of seeds in paper bags under shade results in a higher physiological quality, but the sanitary quality is compromised. However, the pathogens present in the seeds did not inhibit their viability and vigor. The storage for eight months reduces the seed quality.

scholarly journals Treatment with insecticide and fungicide on the physiological quality of lentil seeds

2023 ◽  
Vol 83 ◽  
Author(s):  
J. Rubert ◽  
S. H. B. Dornelles ◽  
U. R. Nunes ◽  
N. T. Pedrollo ◽  
M. Peripolli ◽  
...  
Keyword(s):  
Seed Treatment ◽  
Accelerated Aging ◽  
Lower Number ◽  
Thiophanate Methyl ◽  
Pests And Diseases ◽  
Randomized Design ◽  
Physiological Properties ◽  
Physiological Quality ◽  
Completely Randomized Design

Abstract The low Brazilian productive index and the high demand have aroused interest in the cultivation of lentils, however the legume is little known and needs further studies. The objective of this study was to analyze and identify the effects of treatments with insecticides and fungicides on the physiological quality of lentil seeds, CA-1512 strain. The experiments were conducted in the seed laboratory in a completely randomized design with seven treatments and four replicates. Seed treatment with Thiophanate-methyl; Fluazinam® (180 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml) promoted higher levels of germination under accelerated aging, lower number of abnormal seedlings and longer lengths of shoot and radicle for the emergence in paper. Treatment with Carboxin; Thiram® (250 ml) + Imidacloprid® (150 ml) allowed a higher value in the first count of germination in sand, lower number of dead seeds under accelerated aging and longer root length, in the emergence in sand. Shoot length in the emergence in sand increased after seed treatment with Metalaxyl-M; Fludioxonil® (75 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml). Treatments with fungicides and insecticides considerably improved the physiological properties of the seeds, thus being able to guarantee greater phytosanitary qualities in the field, generating healthier seedlings and with protection against possible pests and diseases, and consequently guaranteeing greater productivity.

scholarly journals Vigor tests to evaluate the physiological quality of corn seeds cv. 'Sertanejo'

2017 ◽  
Vol 47 (3) ◽  
Author(s):  
Daniela Vieira dos Anjos Sena ◽  
◽  
Edna Ursulino Alves ◽  
Dayana Silva de Medeiros ◽  
Keyword(s):  
Electrical Conductivity ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Cold Test ◽  
Agricultural Science ◽  
Additional Information ◽  
Randomized Design ◽  
Seed Analysis ◽  
Physiological Quality

ABSTRACT: The vigor tests are intended to monitor the quality of seeds as it allows reliably distinguish lots of low and high vigor, providing additional information to the germination test. So in this study the objective was to identify the most efficient vigor tests on stratification of lots of corn seeds cv. 'Sertanejo'. The experiment was conducted at Laboratory of Seed Analysis at the Center of agricultural Science of the Universidade Federal da Paraíba, using samples from 20 seed lots in a completely randomized design. For characterization of the lots it was evaluated water content, germination and vigor (cold test, electrical conductivity, accelerated aging, seedling emergence in field and germination at low temperatures). The accelerated aging, electrical conductivity and field emergence of seedlings tests are the most efficient for classification of lots of corn seeds cv. 'Sertanejo' in levels of vigor, been the seeds of lot 1 the most vigorous.

scholarly journals Seed and seedling quality of three chilis (Capsicum annuum L.) native to Oaxaca, Mexico

2020 ◽  
Vol 50 (9) ◽  
Author(s):  
Jair Sanjuan-Martínez ◽  
Yolanda Donají Ortiz-Hernández ◽  
Teodulfo Aquino-Bolaños ◽  
Serafín Cruz-Izquierdo
Keyword(s):  
Laboratory Experiments ◽  
Germination Rate ◽  
Green Pepper ◽  
Randomized Design ◽  
Vigor Index ◽  
Physiological Quality ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Traditional Manner

ABSTRACT: The diversity of chilis in Oaxaca is one of the most extensive in Mexico. Growers select seeds in the traditional manner; information on its quality is unknown. The aim of this research was to compare the physical and physiological quality of seeds and seedlings of three native types to chili (Huacle, De agua and Pasilla) and of the commercial Green pepper as control. Fifteen variables were evaluated in seed and twelve in seedlings. The laboratory experiments were established under a completely randomized design. Means of the variables were compared using the Tukey test (α=0.05). Results showed that Pasilla chili had the highest values in seed size and weight, which was 1.44 g heavier than the control and 2.09 to 3.73 g higher than native types. Haucle chili and green pepper had a 90% germination rate, while chili De agua and Pasilla chili had germination rates of 51 and 38%, respectively. Huacle chili had the highest germination rate index (29.89) and seedling vigor index (992.25). The top highest values of number of normal seedlings were obtained in the control and Huacle chili seedlings (72 and 88%); also, the latter had the longest plumule (3.36 cm) and radicle (7.67 cm) values. Both Huacle and Pasilla chili seedlings had larger values in height, stem thickness, number of leaves, leaf area and slenderness index than De agua and Green pepper. Huacle chili had good physical and physiological quality similar to the seeds of the commercial Green pepper.

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.

Physiological quality of conventional soybean cultivars of seeds as a function of pod position in plant canopy

2020 ◽  
pp. 336
Author(s):  
Tiago Rodrigues Souza ◽  
Marcos Eduardo Viana Araujo ◽  
Itamar Rosa Teixeira ◽  
Marina Costa Guerrero ◽  
Sebastião Pedro Silva Neto ◽  
...  
Keyword(s):  
Accelerated Aging ◽  
Soybean Seeds ◽  
Plant Canopy ◽  
Soybean Cultivars ◽  
Randomized Design ◽  
Plant Growth Habit ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Growth Habits

Soybean cultivars have different growth habits, and the cultivation of those of indeterminate habit has increased significantly in Brazil. Thus, the aim of this study was to evaluate the physiological quality of soybean seeds produced in two harvests, from cultivars with different growth habits and ripening cycles, harvested in different canopy thirds of the plant in the canopy. The seeds were produced in Ipameri, Goiás –Brazil, in two crop harvests, 2014/15 and 2015/16. A completely randomized design was used in a 4x3 factorial scheme with four replications. The treatments consisted of four soybean cultivars with different growth habits and ripening cycles (BRS 6780, BRS 6980, BRS 7980 and BRS 8381), harvested in three positions of the plant canopy (upper, middle and lower). Germination, first count, accelerated aging and electrical conductivity tests were performed. It was observed that the physiological quality of genetic materials studied was influenced by the variable environmental conditions. Soybean cultivars the early cycles produced seeds of superior physiological quality, regardless of plant growth habit. Seeds of soybean cultivars of indeterminate and determined growth habits and earlier cycle, harvested from the upper and middle thirds of the plant, are of better quality. Finally, cultivars with semi-determined and determined habits and late cycles will produce lower quality batches of seeds, regardless of which third of the plant they were harvested.

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 Production of Bambusa vulgaris seedlings from rhizomes under brackish water irrigation

2020 ◽  
Vol 24 (5) ◽  
pp. 337-342
Author(s):  
Lourenço M. C. Branco ◽  
Claudivan F. de Lacerda ◽  
Albanise B. Marinho ◽  
Carlos H. C. de Sousa ◽  
Amanda S. F. Calvet ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Brackish Water ◽  
Dry Matter ◽  
Leaf Gas Exchange ◽  
Photosynthesis Rate ◽  
Seedling Production ◽  
Randomized Design ◽  
Bambusa Vulgaris ◽  
Completely Randomized Design

ABSTRACT The objective of this study was to evaluate the influence of irrigation with brackish water on the production of bamboo seedlings (Bambusa vulgaris). The experiment was carried out at the Fazenda Experimental Piroás, in the municipality of Redenção, CE, Brazil (4° 14’ 53” S, 38° 45’ 10” W, and altitude of 230 m), in a completely randomized design with five treatments and six repetitions. The treatments consisted of five irrigation water electrical conductivity (ECw): 0.5 (control); 1.5; 2.5; 3.5 and 4.5 dS m-1. At 120 days after the beginning of the application of the treatments the leaf gas exchange, relative chlorophyll index (RCI), plant height (H), shoot dry matter (SDM), H/SDM ratio, and the concentrations of Na+ and K+ in stems and leaves were evaluated. Salt tolerance indexes were calculated based on SDM, H, photosynthesis rate and RCI. The increase in the ECw reduced leaf gas exchange, and the reduction in the photosynthesis rate was caused by stomatal and non-stomatal effects. The salinity affected negatively the growth and quality of bamboo seedlings, with the greatest effects being with ECw equal to or greater than 2.5 dS m-1. Bamboo seedlings present Na+ retention in the stems and low Na+/K+ ratio in the leaves. Bamboo seedlings are tolerant to salinity up to 1.5 dS m-1, indicating that waters with this salinity can be used for seedling production of this species, without loss of growth and quality.

Sign in / Sign up

Export Citation Format

Share Document