scholarly journals Association between the artificial aging test and the natural storage of coffee seeds

2018 ◽  
Vol 40 (2) ◽  
pp. 164-172 ◽  
Author(s):  
Tatiana Botelho Fantazzini ◽  
Dellyzete Veiga Franco da Rosa ◽  
Cristiane Carvalho Pereira ◽  
Diego de Sousa Pereira ◽  
Marcelo Ângelo Cirillo ◽  
...  
Keyword(s):  
Coffea Arabica ◽  
Artificial Aging ◽  
Accelerated Aging ◽  
Coffea Canephora ◽  
Correlation Factor ◽  
Controlled Environment ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Storage Potential ◽  
Coffea Arabica L

Abstract: The accelerated aging test is recognized as an efficient method for evaluating the vigor of seed lots and for estimating their storage potential. Thus, this work aimed to evaluate the association between artificial aging and natural storage of coffee seeds, through the correlation factor analysis. Seeds of four cultivars of Coffea arabica L. (Catuaí Amarelo, Arara, Catiguá, and Mundo Novo) and one of Coffea canephora Pierre (Apoatã) were used. Part of the newly-harvested seeds were aged in a growth chamber under controlled temperature and relative humidity conditions (42 ºC and 100% RH) for periods of 0, 4, 6, 8, and 10 days. The other part of the seeds was stored in tri-wall paper packaging for a period of 2, 4, and 6 months in a non-climate-controlled environment. Artificial aging allows predictions on the storage potential of coffee seeds, although the artificial aging periods depend on the cultivars.

scholarly journals Изучение потенциала хранения коллекционных образцов кукурузы (Zea mays L.) в условиях консервации ex situ

2021 ◽  
Author(s):  
Людмила Корлэтяну ◽  
◽  
Л. Мелиян ◽  
Анатолий Ганя ◽  
Виктория Михэилэ ◽  
...  
Keyword(s):  
Accelerated Aging ◽  
Seed Storage ◽  
Ex Situ ◽  
Maize Seeds ◽  
Accelerated Aging Test ◽  
Maize Genotypes ◽  
Aging Test ◽  
Post Test ◽  
Storage Potential ◽  
Group 2

Seed storage potential (SP) is an important complex indicator characterizing the ability of collection samples to be conserved ex situ in a genetic bank. The accelerated aging test (AA test) was used to determine the storage potential of maize samples. The AA test for maize seeds was carried out at 43-44°C, 90-100% relative humidity, with an aging time of 96 hours. After the test, various morphophysiological parameters were determined on 8 collection maize samples: germination energy and seed germination, root length and quantity, wet and dry root biomass. The maize genotypes were divided into 3 groups according to various post-test indicators: group 1 (high SP) – genotypes P235; P 310; P243; group 2 (medium SP) – genotypes Р 402, Р 383, Р 465; group 3 (low SP) - genotypes Р 461 и Р 427. Thus, the use of AA test on maize collection samples based on morphophysiological characteristics allows gradation of genotypes by seed SP.

Artificial Aging Test Analysis of Alkyd and Polyurethane Coating System

2012 ◽  
Vol 496 ◽  
pp. 116-120 ◽  
Author(s):  
Pan Liu
Keyword(s):  
Failure Mechanism ◽  
Artificial Aging ◽  
Accelerated Aging ◽  
Coating System ◽  
Test Analysis ◽  
Natural Exposure ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Long Time ◽  
Artificial Uv

Paint aging will take a long time under the conditions of natural exposure, their failure mechanism can't be known quickly. So the artificial UV-condensation accelerated aging test is used to alkyd system and polyurethane system, and the coating aging was analyzed by using SEM, gloss meter and FTIR. The results shown that their failure mechanism is different, the main reason that life of alkyd system was lower than polyurethane system is its weak water-resistant. If the water-resistant of alkyd system can be improved, the use area of alkyd system will be expanded.

scholarly journals Genetic diversity for physiological quality of seeds from corn (Zea mays L.) intervarietal crossbreeds

2013 ◽  
Vol 35 (4) ◽  
pp. 449-456 ◽  
Author(s):  
Daniele Nerling ◽  
Cileide Maria Medeiros Coelho ◽  
Rubens Onofre Nodari
Keyword(s):  
Genetic Diversity ◽  
Zea Mays L ◽  
Accelerated Aging ◽  
Genetic Contribution ◽  
Percentage Germination ◽  
Canonical Variables ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality

The physiological quality is based on the genotype and may be accompanied since the first stages of selection through the study of genetic diversity. The purpose of this study was to evaluate the parental genetic contribution in the seed physiological quality in corn intervarietal crossbreeds. The intervarietal crossbreeds were performed using landraces genotypes, open pollinated varieties and commercial hybrids. The seeds obtained from the crossbreed, their equivalents and parentals were evaluated regarding their water percentage, germination, germination speed rate, accelerated aging, field emergence and electrical conductivity. The seeds obtained in the crossbreed are viable and vivid with heterosis when compared with the parentals. The accelerated aging test was more effective for selecting the strongest genotypes. The canonical variables were useful to group the genotypes that presented similar physiological characteristics. The genotypes MPA 01 x Pixurum 05, MPA 01 x AS1565, MPA 01 x SJC5886, SJC5886 x Pixurum 05 and Fundacep 35 x SCS 154 Fortuna were the best crossbreeds regarding the production of better physiological quality seeds.

scholarly journals Genética de Coffea: XXI. Hereditariedade dos característicos de Coffea arabica L. var. laurina (Smeathman) DC

Bragantia ◽  
1954 ◽  
Vol 13 (unico) ◽  
pp. 247-255 ◽  
Author(s):  
C. A. Krug ◽  
A. Carvalho ◽  
H. Antunes Filho
Keyword(s):  
Coffea Arabica ◽  
Coffea Canephora ◽  
Coffea Arabica L

A variedade laurina, comparada à var. typica de Coffea arabica, se caracteriza por seu menor porte, forma cônica, ramificação mais densa, internódios mais curtos, fôlhas elíticas e menores, flôres de tamanho normal, frutos e sementes menores e afilados na base. Numerosas autofecundações e cruzamentos foram realizados e os resultados obtidos permitiram concluir que os característicos diferenciais da var. laurina são controlados por um par de fatôres genéticos recessivos, sendo as plantas laurina de constituição lrlr. As plantas híbridas (laurina x typica) são perfeitamente normais e no F2 e "backcrosses" com a var. laurina ocorrem plantas normais e laurina, nas proporções esperadas na base de segregação de um par de fatôres genéticos principais. Do cruzamento com a var. murta resultaram plantas murta e normais, indicando que os cafeeiros laurina estudados são portadores dos alelos tt. As hibridações feitas entre os cafeeiros laurina de várias procedências deram apenas plantas laurina, não se tendo, todavia, indicações se as mutações são ou não independentes. Uma única planta resultante do cruzamento com a espécie diplóide Coffea canephora apresenta fõlhas de tamanho intermediário, porém porte normal e brotos de côr bronze, característicos de C. canephora. Embora produza bebida de alta qualidade, o café laurina tem pouco valor comercial, em virtude de sua produção bem menor do que a das linhagens selecionadas da var. bourbon, ora em distribuição pelo Instituto Agronômico.

scholarly journals Accelerated aging test in amaranth (Amaranthus cruentus L.) seeds

2018 ◽  
Vol 12 (03) ◽  
pp. 444-448
Author(s):  
Andréa Bicca Noguez Martins ◽  
◽  
Caroline Jácome Costa ◽  
Fernanda da Motta Xavier ◽  
André Pich Brunes ◽  
...  
Keyword(s):  
Accelerated Aging ◽  
Amaranthus Cruentus ◽  
Accelerated Aging Test ◽  
Aging Test
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