scholarly journals Early harvest increases post-harvest physiological quality of Araucaria angustifolia (Araucariaceae) seeds

2016 ◽  
Vol 64 (2) ◽  
pp. 885 ◽  
Author(s):  
Marilia Shibata ◽  
Cileide Maria Medeiros Coelho
Keyword(s):  
Moisture Content ◽  
Storage Period ◽  
Development Stage ◽  
Araucaria Angustifolia ◽  
Short Root ◽  
Seed Moisture Content ◽  
Short Period ◽  
Germination Speed ◽  
Physiological Quality ◽  
Cotyledonary Stage

<p><em>Araucaria angustifolia </em>is a native conifer from Brazil and an endangered species. Its seeds have a short period of viability, and this factor contributes to its vulnerability. This study aimed to evaluate physiological quality during the development and post-storage period of <em>A. angustifolia</em> seeds. Cones <em>A. angustifolia</em> were collected in the Curitibanos – Santa Catarina - Brazil in March, April, May, June, July and classified in cotyledonary, I, II, III and IV development stage according to the month of collection. Thereafter, seeds were stored in a refrigerator for 60 and 120 days and submitted to germination test in a germination chamber (25°C – photoperiod 12 h), moisture content (105 °C by 24 hours), tetrazolium test (0.1% by 1 hour) and vigor tests: electric conductivity (75 mL distilled water at 25 °C) and germination speed index, shoot, root length. During seed development, the moisture content decreased from the cotyledonary stage (66.54%) to stage IV (47.44%), and an increase in viability and vigor at the last stage, was observed. During the storage, the moisture content at the cotyledonary and I stage was stable. On the other hand, at stages II and III, stored seeds showed decrease after 120 days.  Physiological quality at the cotyledonary stage increased germination to 86% and 93% after 60 and 120 days of storage, respectively. Unlike the stages II and III, that showed a decrease in seeds viability and vigor after storage. Electrical conductivity was higher for fresh seeds at the cotyledonary stage than for those stored for 60 days and 120 days. However, at other stages, released leachates content, after 120 days of storage, was higher with the advance of collection period. Germination speed index, shoot and root lengths showed seeds at cotyledonary and I stage had the highest values after storage period, unlike at stages II and III, where short root and shoot lengths were observed during storage. Thus, the maintenance of seed moisture content during storage was variable and dependent on the period of collection. Furthermore, the behavior of the physiological quality was different at the early and later stages. An early collection favored seeds physiological quality, and may be a strategy to increase the conservation of<em> A. angustifolia</em> seeds.</p>

scholarly journals Storage of seeds of Cnidosculus phyllacanthus Pax & K. Hoffm.

2005 ◽  
Vol 9 (4) ◽  
pp. 591-595
Author(s):  
Lígia M. de M. Silva ◽  
Ivor B. de Aguiar ◽  
Déborah L. de Morais ◽  
Ricardo A. Viegas ◽  
Joaquim A. G. Silveira
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Storage Conditions ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Room Condition ◽  
Germination Speed ◽  
Physiological Quality ◽  
Cold Chamber

This work aimed to determine the best environment for conservation of physiological quality of seeds of Cnidosculus phyllacanthus during storage. Seeds with 8.5% moisture content and 86% germinative capacity were filled in containers of different permeability, and storaged at different conditions during 360 days. Seeds packed in permeable container (paper bag) were stored at ordinary room temperature (18 to 25 ºC and 55 to 78% RH), and dry chamber (18 ºC and 60% RH) while those packed in semipermeable (polyethylene bag) and impermeable (glass) containers were stored in cold chamber (10 ºC and 75% RH). Seed moisture content, germinative capacity and germination speed were evaluated each 90 days interval. For all the tested storage conditions, seed germination speed was reduced at first evaluation and stabilized up to 360 days. Great deterioration in seeds stored at ordinary room condition was observed, while those stored in dry chamber maintained its germinative capacity for 270 days. The seed germinative capacity was better retained in cold storage, packaged either in semipemeable or impermeable containers. During storage, the seeds had a behavior classified as orthodox.

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 INFLUENCE OF SOYBEAN SEED MOISTURE CONTENT IN THE RESPONSE TO SEED TREATMENT IN SOYBEAN

2018 ◽  
Vol 5 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Marcos Altomani Neves Dias ◽  
André Kitaro Mocelin Urano ◽  
Deborah Bueno Da Silva ◽  
Silvio Moure Cicero
Keyword(s):  
Moisture Content ◽  
Seed Treatment ◽  
Soybean Seed ◽  
Soybean Seeds ◽  
High Moisture ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Physiological Quality ◽  
Seed Respiration ◽  
Key Parameter

Seed treatment (ST) is an important practice for soybean crop. This research had the objective to evaluate the influence of seed moisture content in the response to different spray volumes (SV) used for seed treatment in soybean, considering effects on seed physiological quality. Three seed lots with distinct moistures were used: 7.2%, 10.1% and 13.0%. Untreated seeds (control) and three SV were tested: 8, 13 and 18 mL kg-1. All lots received the same treatment combination, containing insecticide, fungicide, fertilizer and biostimulant. This combination represented 8 mL kg-1 of SV; the doses of 13 and 18 mL kg-1 were obtained by adding 5 and 10 mL kg-1 of water, respectively. Evaluations of seed physiological quality consisted of electrical conductivity, seed respiration, germination and vigor tests. Results of all tests demonstrates that low-moisture soybean seeds (7.2%) are negatively affected by seed treatment within an SV range of 8 to 18 mL kg-1, while untreated seeds with equal moisture are not affected. Oppositely, high-moisture seeds (13.0%) are not affected by the SV tested, while intermediate-moisture seeds (10.1%) are affected by the higher SV. This result highlights seed moisture as a key parameter to be managed before soybean ST, aiming to maintain a high physiological quality.

scholarly journals Physiological quality and economic evaluation of treated cowpea seeds stored in different packaging

2020 ◽  
Vol 9 (7) ◽  
pp. e686974625
Author(s):  
Erick Almeida Andrade ◽  
José Eldo Costa ◽  
Rosilene de Morais da Silva ◽  
Julian Junio de Jesus Lacerda ◽  
Bruno Ettore Pavan ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Storage Period ◽  
Dry Mass ◽  
Hypocotyl Length ◽  
Seed Moisture Content ◽  
Chemical Treatments ◽  
Pet Bottles ◽  
Cowpea Seeds ◽  
Physiological Quality

The objective of this work was to evaluate the physiological quality of cowpea seeds and the economic viability of storage in different types of packaging and with different chemical treatments. Seeds were submitted to one of the following chemical treatments of active ingredients: fipronil; fipronil + pyraclostrobin + thiophanate methyl; and fludioxonil + metalaxyl. Seeds without chemical treatment constituted the control. Seeds were placed in permeable cotton bags, permeable raffia bags, semipermeable kraft paper bags, and impermeable PET bottles. The following were evaluated: seed moisture content; germination test; first germination count; germination speed index; hypocotyl length; root length and hypocotyl dry mass and root dry mass. Cost analysis of treatments was also performed. The physiological quality of cowpea seeds was more markedly reduced under storage conditions in permeable packages with fludioxonil + metalaxyl treatment. Impermeable packaging without chemical treatment decreased deterioration of physiological quality in cowpea seeds and is economically viable for a storage period of up to 90 days.

scholarly journals Prediction of cottonseed longevity

2006 ◽  
Vol 41 (9) ◽  
pp. 1435-1441 ◽  
Author(s):  
Roberto Usberti ◽  
Eric Hywel Roberts ◽  
Richard Harold Ellis
Keyword(s):  
Moisture Content ◽  
Storage Period ◽  
Temperature Treatment ◽  
Survival Curves ◽  
Initial Value ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Moisture Content Level ◽  
Equilibrium Relative Humidity ◽  
Storage Temperatures

The objective of this work was to determine the viability equation constants for cottonseed and to detect the occurrence and depletion of hardseededness. Three seedlots of Brazilian cultivars IAC-19 and IAC-20 were tested, using 12 moisture content levels, ranging from 2.2 to 21.7% and three storage temperatures, 40, 50 and 65ºC. Seed moisture content level was reached from the initial value (around 8.8%) either by rehydration, in a closed container, or by drying in desiccators containing silica gel, both at 20ºC. Twelve seed subsamples for each moisture content/temperature treatment were sealed in laminated aluminium-foil packets and stored in incubators at those temperatures, until complete survival curves were obtained. Seed equilibrium relative humidity was recorded. Hardseededness was detected at moisture content levels below 6% and its releasing was achieved either naturally, during storage period, or artificially through seed coat removal. The viability equation quantified the response of seed longevity to storage environment well with K E = 9.240, C W = 5.190, C H = 0.03965 and C Q = 0.000426. The lower limit estimated for application of this equation at 65ºC was 3.6% moisture content.

scholarly journals Dormancy of safflower seeds: effect of storage and cold stratification

2017 ◽  
Vol 39 (4) ◽  
pp. 433-439 ◽  
Author(s):  
Guilherme Cardoso Oba ◽  
André Luís Duarte Goneli ◽  
Tathiana Elisa Masetto ◽  
Cesar Pedro Hartmann Filho ◽  
Vinicius Souza Patricio ◽  
...  
Keyword(s):  
Moisture Content ◽  
Storage Period ◽  
Mother Plant ◽  
Controlled Environment ◽  
Cold Stratification ◽  
Germination Test ◽  
Physiological Dormancy ◽  
Final Count ◽  
Germination Speed

Abstract: Safflower seeds exhibit dormancy soon after dispersion from the mother plant, making it impossible to sow newly harvested seeds. Thus, the aim of the present study was to evaluate breaking the dormancy of safflower seeds during storage associated with the use of different periods of cold stratification. Seeds with a moisture content of 7.2% were stored for 0, 60, 120, 180, and 240 days, and for each storage period, they were stratified for 0 (control), 1, 2, 3, 4, 5, 6, and 7 days at 10 °C in the dark. After stratification, seeds were subjected to the germination test and evaluated for percentage of root protrusion, germination speed index, and percentages of first count and final count of normal seedlings. Safflower seeds gradually overcome dormancy during storage for 240 days in a non-controlled environment. Storage associated with periods of cold stratification for 5 to 7 days lead to an increase in germination and are effective in breaking the physiological dormancy of safflower seeds.

scholarly journals Aplikasi Gelombang Mikro sebagai Pengendali Cendawan Patogen Terbawa Benih Kedelai

2018 ◽  
Vol 13 (6) ◽  
pp. 191
Author(s):  
Raden Sujayadi ◽  
Supyani Supyani ◽  
Edi Purwanto
Keyword(s):  
Moisture Content ◽  
Fungal Pathogens ◽  
Soybean Seed ◽  
Wave Exposure ◽  
Alternative Methods ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Physiological Quality ◽  
Fusarium Sp ◽  
Two Stages

One of the obstacles in providing high quality soybean (Glycine max) seed is the infection of seed-borne fungal pathogens. Micro wave treatment is one of the alternative methods to control the seed-borne pathogens effectively but it needs to be further developed. This research consisted of two stages. The first stage was aimed to determine the best soybean seed moisture content in maintaining seed physiological quality after exposing to micro wave. The second stage was aimed to determine the most effective duration of micro wave exposure to reduce the rate of infection of seed-borne fungal pathogens using the best moisture content resulted from the first stage. The experiment  on seed moisture indicated that 9.20% was the best seed moisture content in maintaining the physiological quality when the seed was exposed to micro wave.  Furthermore, micro wave exposure of 60 seconds was able to control Aspergillus flavus, while the exposure of  80 seconds was able to control Fusarium sp., Curvularia sp., and A. niger.

scholarly journals Model Dinamik Vigor Daya Simpan Benih Kedelai pada Penyimpanan Terbuka

2016 ◽  
Vol 34 (3) ◽  
pp. 219
Author(s):  
Ari Wahyuni ◽  
M. R. Suhartanto ◽  
Abdul Qadir
Keyword(s):  
Moisture Content ◽  
Initial Moisture Content ◽  
Seed Viability ◽  
Soybean Seed ◽  
Storage Period ◽  
Seed Storage ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Input Model ◽  
Seed Storability

<p>Soybean seed viability declines during seed storage. Soybean seed deteriorates rapidly, affected by its high protein content and often high humidity in the tropical environment. This research was aimed to develop dynamic model of soybean seed viability in an open storage. The study was conducted in three stages, namely: 1) desk study, 2) seed storage experiment, 3) development of seed storage model, simulation and verification of the model. The second stage of the experiment consisted of soybean seed storing and germination testing using completely randomized design. Treatments were three initial moisture content (7-8%, 9-10% and 11-12%) and four varieties of soybean (Anjasmoro, Wilis, Detam-1 and Detam-2). The results showed that the seed behaviour during storage period were affected by initial seed moisture content, initial viability, varieties and environmental condition. Therefore, seed moisture content, initial viability and varieties may be used as input model. Moisture content, integreting seed respiration, electric conductivity and seed storability vigor (VDSDB) were as model output. Simulation of Seed Storability Vigor Prediction Model with Model Construction Layer-Stella (MCLS) using relative humidity (RH), temperature, seed permeability, initial moisture content and initial viability as input model could logically predict the seed moisture content and seed storability vigor (VDSDB).</p>

scholarly journals Storage on the vigor and viability of macauba seeds from two provenances of Minas Gerais State

2016 ◽  
Vol 46 (11) ◽  
pp. 1932-1937 ◽  
Author(s):  
Patrícia Pereira de Souza ◽  
Sérgio Yoshimitsu Motoike ◽  
Mychelle Carvalho ◽  
Kacilda Naomi Kuki ◽  
Eduardo Euclydes de Lima e Borges ◽  
...  
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Germination Rate ◽  
Storage Period ◽  
Storage Conditions ◽  
Minas Gerais ◽  
Biodiesel Production ◽  
Seed Moisture Content ◽  
Energy Field ◽  
Minas Gerais State

ABSTRACT: Macauba palm stands out for having favorable features to biodiesel production such as the high oil content of its fruit. Considering the great potential of the species and their applicability in the renewable energy field, it becomes indispensable to establish the right conditions for storing the seeds for propagation purpose. The aim of this research was to evaluate the effect of seed moisture content, packaging, and storage conditions such as temperature and relative humidity on the quality of seeds from Minas Gerais State, during a 12-month storage period. The research had two independent assays: (I) the seeds were stored with three moisture contents/ranges 4.0≤6.0%; 6.0≤8.0% and 8.0≤10.0% in impermeable packages, under room temperature and at 10ºC; (II) seeds with approximately 5.9% of moisture content were stored in three different types of packages: a) permeable, b) semi-permeable and c) impermeable. Three storing conditions were tested: a) room temperature and RH under laboratory conditions; b) 15ºC and 45% RH; c) 20ºC and 55% RH. Water content, germination rate and germination speed index were evaluated at 0, 4, 8 and 12 months of storing. The best germination results were obtained with the moisture range of 6.0≤8.0%, with seeds kept at room temperature; while the seeds stored at 10ºC, regardless the moisture range, did not survive. The stored seeds with 5.9% moisture content and at both 15ºC/45%RH and 20ºC/55% RH conditions, independently of the package type used, showed the best results. Thus, macaw palm seeds can be classified as intermediates seeds.

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