scholarly journals Drying and storage of Eugenia involucrata DC. seeds

2003 ◽  
Vol 60 (3) ◽  
pp. 471-475 ◽  
Author(s):  
Angela Maria Maluf ◽  
Denise Augusta Camargo Bilia ◽  
Claudio José Barbedo
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Cold Storage ◽  
Native Species ◽  
Plastic Bags ◽  
Physiological Quality ◽  
Drying Rates ◽  
And Storage ◽  
Water Contents

The physiological quality of seeds of native species is important to produce healthy saplings and therefore guarantee the success of programs to recover disturbed vegetation. This reinforces the necessity for investigating the physiological quality of those seeds. To evaluate the effects of different drying rates on the germination, moisture content and storability of Eugenia involucrata diaspores, mature fruits collected at Mogi Guaçu, SP, Brazil had their epi- and mesocarps removed by washing and were dried at 30, 40 or 50ºC until their water content was reduced from 57% (fresh diaspores) to 13% (final drying), totaling six drying levels. In a second experiment, diaspores had their moisture content reduced from 57% to 49%, at 30ºC, totaling six drying levels (0h, 1h, 2h, 3h, 4h and 5h), and were kept for 180 days in plastic bags under cold storage. The drying rate had no effect on tolerance to desiccation by E. involucrata diaspores; water contents lower than 51% decreased both germinability and storability. Diaspores can be stored for up to 180 days as long as their water content is reduced to 53% and they are kept inside plastic bags under cold storage.

scholarly journals Physiological performance of Coccoloba gigantifolia seeds subjected to desiccation and storage

2021 ◽  
Vol 43 ◽  
Author(s):  
Sidney Alberto do Nascimento Ferreira ◽  
Daniel Felipe de Oliveira Gentil ◽  
Carlos Alberto Cid Ferreira
Keyword(s):  
Moisture Content ◽  
Marked Reduction ◽  
Control Treatment ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
And Storage ◽  
Storage Temperatures ◽  
Water Contents

Abstract: Coccoloba gigantifolia is recently described species, with an area of restricted occurrence and threatened with extinction, whose great ornamental potential is due to the size of its leaves and the architecture of the plant. The objective of this study was to evaluate the viability of its seeds under different water contents and storage temperatures, through two experiments. The first one used a completely randomized design (CRD) with six treatments (drying periods: 0, 1, 2, 3, 4 and 5 days) and four replications. The second experiment used a CRD in a 2 (storage temperatures: 8.0 ± 1.2 and 19.5 ± 0.7 °C) x 3 (storage periods: 1, 2 and 4 months) factorial scheme, in addition to a control treatment (without storage), with four replications. The seeds have a recalcitrant behavior, as they are sensitive to desiccation, with a marked reduction in viability with moisture content below 19.5%. Storage at temperatures of 8.0 and 19.5 °C did not maintain the physiological quality of the seeds, with 25.2% water, and the largest losses were found at a temperature of 8.0 oC.

scholarly journals Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds

2005 ◽  
Vol 17 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Sttela Dellyzete Veiga Franco da Rosa ◽  
Delacyr da Silva Brandão Júnior ◽  
Édila Vilela de Resende Von Pinho ◽  
André Delly Veiga ◽  
Luiz Hildebrando de Castro e Silva
Keyword(s):  
Water Content ◽  
Storage Temperature ◽  
Removal Rate ◽  
Coffea Canephora ◽  
Development Stage ◽  
Seed Vigor ◽  
Drying Rate ◽  
Physiological Quality ◽  
Drying Rates

Desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. Coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. The objective of this study was to verify the effect of different drying rates on the viability and storability of Coffea canephora seeds. A complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°C). The germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. It was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. The greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. There was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°C. C. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°C. A temperature of 20ºC can be used to store C. canephora seeds, as long as the water content is not reduced to values below 22 % water content.

scholarly journals Physiological quality of Gliricidia sepium (Jacq.) Steud. (Leguminosae - Papilionoideae) seeds subjected to different storage conditions

2012 ◽  
Vol 36 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Renata Conduru Ribeiro Reis ◽  
Claudinéia Regina Pelacani ◽  
Cimille Gabrielle Cardoso Antunes ◽  
Bárbara França Dantas ◽  
Renato Delmondez de Castro
Keyword(s):  
Water Content ◽  
Seed Viability ◽  
Gliricidia Sepium ◽  
Storage Conditions ◽  
Physiological Processes ◽  
Plastic Bags ◽  
Starting Point ◽  
Cultivated Plant ◽  
Physiological Quality

Studies of seed physiological processes represent the starting point for the sustainable utilization of native or cultivated plant species from the caatinga biome for which germination studies are still scarce. In order to determine adequate methods for the conservation of Gliricidia sepium seeds, the physiological quality of propagules exposed to different conditions and times of storage were examined. Recently collected seeds of G. sepium were analyzed immediately, while the other sample was stored for three, six, nine, or twelve months in plastic or paper bags under refrigeration or at room temperature for further analysis. The germination rates of seeds from each storage regime were determined and these rates compared to their water content. It was observed that germination capacity was directly related to changes in seed humidity. Storing seeds in plastic bags yielded the best conservation, mainly when they were stored at low temperatures. However, even at temperatures near 25°C it was possible to prolong seed viability when their water content was controlled through the use of impermeable packing.

scholarly journals Physiological quality of pink pepper seeds (Schinus terebinthifolia Raddi.) as a function of storage

2021 ◽  
Vol 38 (1) ◽  
pp. 144-157
Author(s):  
Thaísa De Oliveira Silveira ◽  
Madelon Rodrigues Braz ◽  
Gilmara Pires de Moura Palermo ◽  
Tiago Böer Breier
Keyword(s):  
Moisture Content ◽  
Storage Time ◽  
Storage Period ◽  
Seed Storage ◽  
Dry Weight ◽  
Native Forest ◽  
Alternative Source ◽  
Physiological Quality ◽  
And Storage

Seeds of native forest species for food and seedling production have a growing demand that impacts the need for studies involving seed storage in order to maintain good levels of germination quality. Thus, scientific analyzes that explore the physiological potential of the seeds of these species are necessary, especially for the pink pepper (Schinus terebinthifolia Raddi.), a species used as an alternative source of income for traditional communities and which has been arousing interest due to the consumption of its fruits as a condiment in the national and international market. This work aimed to assess the physiological quality of pink pepper seeds according to the storage period and seed size. The seeds came from a rural settlement, a pioneer in the extraction of pink pepper, in the state of Rio de Janeiro, Brazil. The seeds were evaluated for moisture content, germination, first count, length and dry weight of the germinated seedlings, during the period of time that they remained stored and the size of the seeds. The results allowed to conclude that: i) the germinative percentage of the stored pink pepper seeds decreased over the months; ii) the moisture content of the seeds decreased over the months evaluated iii) the different sizes of seeds did not show differences in germination and storage time and iv) values of length and dry weight of the seedlings did not differ according to the period of storage.

scholarly journals Performance of different drying methods and their effects on the physiological quality of grain sorghum seeds (S. bicolor (L.) Moench)

2008 ◽  
Vol 30 (3) ◽  
pp. 177-184 ◽  
Author(s):  
Lucia Brandão Franke ◽  
Miguel Ângelo Peixoto Torres ◽  
Rodrigo Ramos Lopes
Keyword(s):  
Grain Sorghum ◽  
Drying Methods ◽  
Liquefied Petroleum Gas ◽  
Intermittent Treatment ◽  
Natural Conditions ◽  
Physiological Quality ◽  
Drying Rates ◽  
Water Contents ◽  
Drying Curve

This experiment viewed to evaluate the physiological quality of grain sorghum seeds as well as to determine the respective drying curve of each of three drying methods. The seeds harvested at 18.9%, 18.1%, and 18.2% of moisture content were submitted to the following drying methods : a) under natural conditions, b) an intermittent dryer in which the combustion of firewood was the source of caloric energy, and c) a stationary dryer in which the source of caloric energy was the burning of liquefied petroleum gas. The experimental design was a completely randomized one with 25 repetitions of one hundred seeds each. The water contents and weight of one thousand seeds were evaluated. Seeds physiological quality was evaluated by germination and vigor tests. Seed drying rates were of 0.11, 1.25, and 0.55 percent points per hour (pph -1) for the natural, intermittent and stationary drying methods, respectively. The intermittent treatment permits the highest loss of water in the shortest period of time, and germination and vigor remaining unchanged.

scholarly journals Exudate coloring test suitability for assessing the viability of coffee seeds ( Coffea arabica L.)

2016 ◽  
Vol 38 (3) ◽  
pp. 212-218 ◽  
Author(s):  
Paulo César Hilst ◽  
Denise Cunha Fernandes dos Santos Dias ◽  
Guilherme Fontes Valory Gama ◽  
Joyce de Oliveira Araújo
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Coffea Arabica ◽  
Test Results ◽  
Germination Test ◽  
Paper Towel ◽  
Coffea Arabica L ◽  
Water Contents

Abstract: The exudate coloring test has been promising in order to quickly evaluate the quality of coffee seeds. The objective of the research was to adjust the coloring exudate test for coffee seeds and to evaluate the influence of the water content of seeds and of the imbibition period on the test results. Seeds from five lots of 'Catuaí 44' were used, with the following water contents: 30%, 20% and 12%. For the exudate coloring test, the parchment and silver skin (spermoderm) from the seeds were removed. Then, the seeds were distributed on a paper towel, moistened with water, and kept in a germinator at 25 °C for 24, 48, 72, 96 and 120 h. Four classes of coloring intensity were established: absence of color (A), light (L), medium (M) and strong (S) intensities, assigning the values 0, 3, 5 and 10 for each class, respectively. The Viability Index (VI) was calculated by the equation VI=100-(0xA)-(3xL)-(5xM)-(10xS). The exudate coloring test may be recommended to estimate the viability of coffee seeds, providing results correlated to the germination test. The best results were obtained for the seeds with 12% moisture content imbibed for 72, 96 and 120 h and seeds with 30% moisture content after 72 and 120 h of imbibition.

scholarly journals Tolerance of Coffea arabica L. seeds to sub zero temperatures

2017 ◽  
Vol 41 (3) ◽  
pp. 312-321 ◽  
Author(s):  
Stefania Vilas Boas Coelho ◽  
Sttela Dellyzete Veiga Franco da Rosa ◽  
Aline da Consolação Sampaio Clemente ◽  
Cristiane Carvalho Pereira ◽  
Madeleine Alves de Figueiredo ◽  
...  
Keyword(s):  
Storage Period ◽  
Electrophoretic Analysis ◽  
Long Term Storage ◽  
Physiological Quality ◽  
And Storage ◽  
Coffea Arabica L ◽  
Coffee Seed ◽  
Water Contents

ABSTRACT Preservation of the quality of coffee seeds is hindered by their intermediate behavior in storage. However, long-term storage at sub zero temperatures may be achieved by adjusting the water content of the seeds. The aim of this study was to evaluate the tolerance of coffee seeds to freezing, in relation to physiological and enzymatic modifications. Coffee seeds were dried in two manners, rapid and slow, to water contents of interest, 0.67, 0.43, 0.25, 0.18, 0.11, and 0.05 g H2O g-¹ dw (dry basis). After drying, the seeds were stored at a temperature of -20 ºC and of 86 ºC for 24 hours and for 12 months, and then compared to seeds in cold storage at 10 ºC. The seeds were evaluated through calculation of percentage of normal seedlings, percentage of seedlings with expanded cotyledonary leaves, dry matter of roots and of hypocotyls, and viability of embryos in the tetrazolium test. Expression of the enzymes superoxide dismutase, catalase, and peroxidase were evaluated by means of electrophoretic analysis. Only seeds dried more slowly to 0.18 g H2O g-1 dw present relative tolerance to storing at -20 °C for 12 months. Coffee seeds do not tolerate storage at a temperature of -86 ºC for 12 months. Water contents below 0.11g H2O g-¹ dw and above 0.43 g H2O g-¹ dw hurt the physiological quality of coffee seeds, regardless of the type of drying, temperature, and storage period. Coffee seed embryos are more tolerant to desiccation and to freezing compared to whole seeds, especially when the seeds are dried to 0.05 g H2O g-¹ dw. The catalase enzyme can be used as a biochemical marker to study tolerance to freezing in coffee seeds.

scholarly journals UJI MUTU BENIH TIGA VARIETAS PADI (Oriza sativa L) PADA BEBERAPA WADAH SIMPAN The test quality seed of tree rice variety on the several storage containers

AgriPeat ◽  
2019 ◽  
Vol 20 (02) ◽  
pp. 75-80
Author(s):  
Admin Journal
Keyword(s):  
Water Content ◽  
Block Design ◽  
Rice Variety ◽  
Test Quality ◽  
Storage Container ◽  
Randomized Block Design ◽  
Physiological Quality ◽  
Storage Containers ◽  
And Storage

ABSTRACTThe aim of the study was to examine several storage containers for the quality of the seeds of threerice varieties. Using a randomized block design faktorial. The first factor is the storage container (W)consisting of W1 = open cardboard, W2 = gunny sack, W3 = plastic and W4 = can. The second factor isrice varieties consisting of V1 = inpara 3, V2 = situbagendit and V3 = towuti. The physiological qualityvariables observed are water content, germination power and the potential for maximum seed growth.The results showed that the storage container and variety had an effect on water content, germinationand the potential for maximum seed growth. The physiological quality of Towuti seeds can bemaintained for up to 70 days in a sealed storage container in the form of cans.Keywords: seeds, rice variety and storage container

scholarly journals Fruit processing and the physiological quality of Euterpe edulis Martius seeds

2014 ◽  
Vol 36 (2) ◽  
pp. 134-142 ◽  
Author(s):  
Patrícia Ribeiro Cursi ◽  
Silvio Moure Cicero
Keyword(s):  
Water Content ◽  
Seedling Emergence ◽  
Physiological Performance ◽  
Euterpe Edulis ◽  
Fruit Processing ◽  
Physiological Quality ◽  
Euterpe Edulis Martius ◽  
Water Contents ◽  
Do So

Different pulping methods were analyzed for Euterpe edulis, with regard to its seed physiological quality, and the physiological performance of seeds submitted to continuous drying and monitored by radiographs was assessed. In order to do so, 2x2 factorial design treatments were carried out, using two different manners to store fruit prior to pulping, immersed in water and not. Also, two different methods for the pulping of fruit were used for each lot; namely, manual and mechanical. Seeds from fruit that had been immersed in water at 40 ºC for 20 minutes showed greater physiological performance than those that had not been immersed in water previously. Immersion in water at 55 ºC resulted in seed death. The pulp extraction method, whether manual or mechanical, did not affect seed physiological performance. Radiographs made it possible to observe that the volume occupied by embryos in the embryo cavity reduced with decreased water content. Mechanical pulping showed no reduction in percentage of seedling emergence for water content up to 33.3%. However, reduction in water content to 16.1% caused seed death. The drying of manually pulped seeds until reaching 39.0% water content did not adversely affect seedling emergence, whereas lower water contents than 25.6% caused seed death.

scholarly journals Hydration methods and physiological potential of sweet corn seeds

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Jéssica de Lucena Marinho ◽  
Inês Cristina De Batista Fonseca ◽  
Claudemir Zucareli
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Filter Paper ◽  
Sweet Corn ◽  
Humid Atmosphere ◽  
Analysis Methodology ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design

The evaluation of the physiological potential of sweet corn seeds is fundamental in the production process, because the germination and vigor reflect the potential for storage, commercialization and use of these seeds. The choice of vigor tests with an adequate and efficient analysis methodology is fundamental to obtaining reliable results. In this sense, the objective of this study was to assess the physiological potential of sweet corn seeds after hydration using different moistening methods to increase water content to 20%. First, the lot of seeds was characterized as to its moisture content and initial physiological potential. Subsequently, two experiments were conducted, both under a completely randomized design. In the first experiment, different volumes of water on the filter paper sheets were assessed for seed hydration a method that uses a wet substrate. In the second, four hydration methods were evaluated: wet substrate (WS), humid atmosphere (HU), immersion in water (IW) and addition of the required amount of water (WR). A constant temperature of 25ºC was used in both experiments and then the moisture content and physiological potential of seeds were determined. The humid atmosphere method reduces the physiological quality of sweet corn seeds because it favors the deterioration and hence is unsuitable for the hydration of seeds of this species. The wet substrate method, in an amount equivalent to 2.5 times the paper mass, increased the water content of sweet corn seeds to 20%, achieving the desired degree of moisture without altering their physiological potential.

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