Water absorption and improvement of methods for electrical conductivity test in acacia seeds

It was intended in this work to characterize the water absorption standard after seed dormancy break and establishing the amount of water, container size and the need of breaking the tegument dormancy for the application of the electrical conductivity test in small and large seeds of A. mangium with different ages established in poor yielding-capacity soils on savannah areas of Roraima. The seeds were collected on trees 10, 8 and 6 years old, afterwards, classified into large and small, constituting six lots. Germination test with four replications of 50 seeds for each lot on germitest® paper maintained on gerbox at 25°C was carried out. Imbibition was verified with weighing in the times of 0, 2, 5, 8, 12, 16, 24, 36, 48, 60, 72, 84, 96 and 120 hours with the seeds placed between papers. The electrical conductivity test consisted of three experiments, distinguished by the amount of water utilized and by the size of the container in which the seeds were immersed. Seeds of A. mangium coming from trees over 10 years old presented increased germination percent and germination speed than seeds of six-year old trees. Small seeds present increased electrical conductivity and water absorption till 120 hours relative to large seeds. The immersion of seeds of A. mangium in 40 mL of distilled water into 180-mL plastic containers, after dormancy break, is indicated for the determination of electrical conductivity.

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Chloride salts inhibit emergence and seedling growth of chickpea rather than germination

Legume Research - An International Journal ◽

10.18805/lr.v40i04.9007 ◽

2017 ◽

Vol 40 (04) ◽

Author(s):

Hamdi Özaktan ◽

Cemalettin Yasar Çiftçi Çiftçi ◽

Mehmet Demir KAYA ◽

Sati Uzun ◽

Oguzhan Uzun ◽

...

Keyword(s):

Electrical Conductivity ◽

Seedling Growth ◽

Genotypic Variation ◽

Germination Percentage ◽

Distilled Water ◽

Germination Test ◽

Seedling Length ◽

Mean Germination Time ◽

Chloride Salts ◽

Chickpea Cultivars

The effects of chloride salts (NaCl, MgCl2 and CaCl2) with the same electrical conductivity (EC) values on germination, emergence, seedling growth and Cl content of seedling in chickpea cultivars (Akçin 91, Aziziye, Gökçe, Inci, Iºýk-05 and Yaºa-05) were investigated. The EC values of the chloride salts were adjusted to 4, 8 and 16 dS m-1 and the distilled water was served as control. Germination percentage, mean germination time, radicula and plumula lengths, fresh and dry radicula and plumula weight, chloride (Cl-) content of seedling in germination test, and seedling length, fresh and dry seedling weight in emergence test were measured. The results revealed that increasing salt doses caused a significant reduction in parameters of all cultivars. The dose of 16 dS m-1 from each salt was found to be lethal. Cl- content of seedling was increased from 0.05 ppm in control to 4.10 ppm in 16 dS m-1; resulting in decreasing germination, emergence and seedling growth. The cultivar Aziziye presented better performance and gave higher emergence rates in NaCl, while Iºýk-05 in CaCl2 and Gökçe in MgCl2; indicating that there was a genotypic variation towards different salt sources. It was concluded that emergence and seedling growth were severely influenced by increasing salinity without changing germination and emergence was not possible at 16 dS m-1.

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Electrical conductivity test in Piptadenia moniliformis Benth. seeds

Journal of Seed Science ◽

10.1590/2317-1545v37n4152357 ◽

2015 ◽

Vol 37 (4) ◽

pp. 199-205

Author(s):

Kleane Targino Oliveira Pereira ◽

Gutierres Silva Medeiros Aquino ◽

Tatianne Raianne Costa Alves ◽

Clarisse Pereira Benedito ◽

Salvador Barros Torres

Keyword(s):

Electrical Conductivity ◽

Dry Mass ◽

Germination Percentage ◽

Distilled Water ◽

Percentage Germination ◽

Germination Speed ◽

Physiological Quality ◽

Water Volumes ◽

Soaking Temperature

The electrical conductivity test is a quick, practical and objective test force; however, its effectiveness varies according to the species, quantity of seed, water volumes, soaking temperature, among other factors. The objective of this study was to evaluate the physiological quality of P.moniliformis seeds lots by means of the electrical conductivity test, testing different methodologies. For this, two lots were tested in three quantities of time (25, 50 and 75 seeds) and nine soaking times (2, 4, 6 , 12, 24 , 36, 48, 60 and 72 hours) in three volumes of water (50, 75 and 100 mL) at 25 °C. To evaluate the initial quality of the lots, germination percentage, germination speed index, average time of germination, length and dry mass of seedlings were determined. The use of the electrical conductivity test of P. moniliformis seeds is recommended using 75 seeds in 75 mL of water for 2 hours at 25 °C or seeds in 50 mL distilled water with 50 seeds per 6 hours at 25 °C.

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Nanostructures of Water Molecules in Iteratively Filtered Water

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.495.37 ◽

2011 ◽

Vol 495 ◽

pp. 37-40 ◽

Cited By ~ 11

Author(s):

Vittorio Elia ◽

Elena Napoli

Keyword(s):

Electrical Conductivity ◽

Chemical Properties ◽

Dissipative Structures ◽

Living Systems ◽

Water Molecules ◽

Distilled Water ◽

Main Ingredient ◽

Structure Of Water ◽

Physico Chemical

This work presents some experimental results on the variation of the physico-chemical properties of pure, twice distilled water, when subject to a procedure of iterative filtrations through Pyrex glass filters (Büchner funnels). The study involves the determination of electrical conductivity. After the filtrations, electrical conductivity increases three times. Part of those increases, about 10-30%, is to be attributed to impurities released by the glass filters. The hypothesis is that the remaining 70-90% of the increases comes from variations in the super-molecular structure of water. The iterative filtration procedure involves a flux of energy and material in an open system. The energy flux is partially dissipated as heat permitting the formation of “dissipative structures”. Water, the main ingredient of living systems, exhibits an extraordinary auto-organization potentiality triggered by several kinds of perturbations, including mechanical ones.

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Biometric description of fruits and seeds, germination and imbibition pattern of desert rose [Adenium obesum (Forssk.), Roem. & Schult.]

Journal of Seed Science ◽

10.1590/2317-1545v37n4152811 ◽

2015 ◽

Vol 37 (4) ◽

pp. 206-213 ◽

Cited By ~ 4

Author(s):

Ronan Carlos Colombo ◽

Vanessa Favetta ◽

Lilian Yukari Yamamoto ◽

Guilherme Augusto Cito Alves ◽

Julia Abati ◽

...

Keyword(s):

Water Absorption ◽

Internal Structure ◽

Germination Percentage ◽

Absorption Curve ◽

Germination Test ◽

Germination Process ◽

Germination Speed ◽

Triphasic Pattern ◽

Number Of Seeds ◽

Seeds Germination

This study has aimed to carry out the description of fruits and seeds and germination process of desert rose, from two years of observations. The fruits and seeds were characterized based on length, diameter and number of seeds per fruit. The seeds internal structure and germinating process were also described. Germination test was performed at 25 and 30 °C temperatures, determining the germination percentage and germination speed index. Seeds harvested in 2013 were stored for 12 months and submitted to a new germination test. Parallel to these tests, the seeds imbibition curve was determined in substrates over and between sheets of paper at 15, 20, 25 and 30 °C temperatures. The fruits and seeds had similar lengths and diameters in both years of observations. The seeds can be stored for up to 12 months without loss in viability and temperatures of 25 and 30 °C are suitable for performing the germination test of this species. The water absorption curve of desert rose seeds follows a triphasic pattern of soaking.

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Absorption Curve and Germination of Jucá Seeds under Different Salts

Journal of Agricultural Science ◽

10.5539/jas.v8n7p112 ◽

2016 ◽

Vol 8 (7) ◽

pp. 112

Author(s):

Danielle Marie Macedo Sousa ◽

Celsemy Eleutério Maia ◽

Elis Regina Costa de Morais

Keyword(s):

Electrical Conductivity ◽

Salt Stress ◽

Seed Germination ◽

Water Absorption ◽

Electric Conductivity ◽

Growth And Development ◽

Saline Solution ◽

Distilled Water ◽

Plant Tolerance ◽

Water Control

The plants are subjected to conditions of multiple stresses that limit their growth and development, which affects their chances of survival wherever they grow. To evaluate the plant tolerance to these conditions, one of the most used methods is the observation of seed germination under salt stress. The action of salts on the seeds varies widely among species and can exert toxic effects, causing damage before and/or after the onset of germination. Therefore, the objective of this work was to evaluate the influence of different salts in water absorption and germination in jucá seeds (Libidibia ferrea). For absorption and germination curve, were used non-scarified and scarified seeds, and subjected to the treatments in distilled water (control) and NaCl solutions, KCl, CaCl2 and K2HPO4, in an electric conductivity of 5 dS m-1. The saline solution composed by K2HPO4 influence on water absorption of L. ferrea in intact seeds. The scarified and non-scarified seeds of L. ferrea have different times for the physiological phases of water absorption. The action of salts in the germination and vigor in non-scarified and scarified seeds, does not significantly reduce these values due to electrical conductivity of 5 dS m-1 not be enough to affect the seed germination of L. ferrea.

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Soaking curve and effect of temperature on the germination of daisy seeds

Horticultura Brasileira ◽

10.1590/s0102-05362012000200021 ◽

2012 ◽

Vol 30 (2) ◽

pp. 312-316 ◽

Cited By ~ 1

Author(s):

Rogério G Pêgo ◽

José Antônio S Grossi ◽

José Geraldo Barbosa

Keyword(s):

Seed Germination ◽

Effect Of Temperature ◽

Distilled Water ◽

Germination Test ◽

Tukey Test ◽

Germination Process ◽

Randomized Experimental Design ◽

Chrysanthemum Leucanthemum ◽

Triphasic Pattern

The soaking curve and the effect of temperature on the germination of daisy seeds (Chrysanthemum leucanthemum) were characterized in this study. To determine the soaking curve, four samples of 0.5 g of seeds were soaked in germitest paper moistened with distilled water and maintained in germinator at 25ºC. The seeds were weighed in periods of 0, 3, 6, 9, 12, 24, 36, 48, 60, 72, 84 and 96 hours using a precision digital balance of 0.0001 g. A triphasic pattern germination curve was adjusted, allowing the determination of the beginning and duration of the phase II of the germination process. The germination test was carried out with four replications of 50 seeds disposed in "Gerbox" boxes and placed in germinators at the temperatures of 20, 25, 30 or 20-30ºC. A completely randomized experimental design was used with four replications of 50 seeds. The data were submitted to the analysis of variance and the averages were compared by the Tukey test, at 5% of probability. For analysis of accumulated seed germination, regressions were adjusted based on period of experiment. The seeds presented a triphasic pattern of germination and the phases I and II lasted 12 and 48 hours, respectively. The best temperature for the germination of the seeds is 25ºC. The temperature of 30ºC promoted the thermoinhibition of germination and increased the dead and dormant seeds and abnormal seedlings.

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ACCELERATED AGING AND ELECTRICAL CONDUCTIVITY TESTS IN CRAMBE SEEDS

Ciência e Agrotecnologia ◽

10.1590/s1413-70542015000100001 ◽

2015 ◽

Vol 39 (1) ◽

pp. 7-14 ◽

Cited By ~ 4

Author(s):

Juliana Joice Pereira Lima ◽

Marcella Nunes de Freitas ◽

Renato Mendes Guimarães ◽

Antônio Rodrigues Vieira ◽

Maria Alice Bento Ávila

Keyword(s):

Electrical Conductivity ◽

Chloride Solution ◽

Accelerated Aging ◽

Germination Test ◽

Crambe Seed ◽

Accelerated Aging Test ◽

Aging Test ◽

Physiological Quality

The aim of this study was to adapt the methodology of the accelerated aging and electrical conductivity tests for determination of physiological potential in crambe seeds. Six seed lots of crambe (cv. FMS Brilhante) were subjected to determination of moisture content, germination test, first count germination, emergence, and emergence speed index. For the accelerated aging test, the traditional methodology was used with water, and with a saturated potassium chloride and sodium chloride solution in three periods of exposure (24, 48, and 72 hours) at 41°C; the electrical conductivity test was performed with four pre-soaking treatments (0, 2, 4, and 8 hours) and four soaking periods (4, 8, 16, and 24 hours) at 25°C. The accelerated aging test with water for 72 hours and the electrical conductivity test with 2 hours of pre-soaking and assessment after 16 hours were effective for classification of the crambe seed lots in regard to physiological quality.

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