scholarly journals Physiological Quality of Swingle Citrumelo Seed after Refrigerated Storage of Fruits and Seeds

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1243
Author(s):  
Marilia Morelli ◽  
Fernando Alves de Azevedo ◽  
Ana Julia Borim de Souza ◽  
Rodrigo Martinelli ◽  
Patrícia Marluci da Conceição
Keyword(s):  
Seed Germination ◽  
Germination Rate ◽  
Soluble Solids ◽  
Maturation Stage ◽  
Refrigerated Storage ◽  
Seed Extraction ◽  
Physiological Quality ◽  
Definition Of ◽  
Cold Chamber ◽  
Swingle Citrumelo

For citrus, there is no definition of the ideal fruit harvesting point for seed extraction. Some studies have shown the positive effect of postharvest refrigerated storage of fruits to obtain quality seeds. This study aimed to evaluate the influence of the fruit maturation stage on the germination of Swingle citrumelo (CS) seeds after the refrigerated storage of fruits and seeds. CS fruits were harvested at 180 days after anthesis (DAA); 210 DAA and 240 DAA. Fruits and seeds were stored in cold chamber for 0, 15, 30, and 45 days. Physicochemical analyses were performed on fruits (colour, soluble solids, acidity and ratio) and seeds (water content, germination, and emergence). Germination of seeds extracted from fruits harvested at 180, 210, and 240 DAA, without refrigerated storage, showed a positive correlation with colour index. The refrigerated storage of fruits and seeds extracted from fruits harvested at 210 DAA, increased the seed germination rate. Peel colour (IC) was correlated positively with the germination of Swingle citrumelo seeds. The results of this study revealed that the absence of refrigerated storage, harvesting Swingle citrumelo fruits, with ripe characteristics (end of harvest), results in a high seed germination rate. On the other hand, refrigerated storage of fruits and seeds extracted from fruits harvested at mid-harvest increases the seed germination rate.

scholarly journals Ideal harvesting point of ‘Limeira-IAC382’ trifoliate orange fruits for seed extraction

2020 ◽  
Vol 42 (1) ◽  
Author(s):  
Patrícia Marluci da Conceição ◽  
Fernando Alves de Azevedo ◽  
Ana Julia Borim de Souza ◽  
Alexandre Gonçalves Próspero ◽  
Marília Morelli ◽  
...  
Keyword(s):  
Germination Rate ◽  
Seedling Emergence ◽  
Titratable Acidity ◽  
Fruit Production ◽  
Soluble Solids ◽  
Trifoliate Orange ◽  
Physicochemical Changes ◽  
Seed Extraction ◽  
Physiological Quality ◽  
Cold Chamber

Abstract Trifoliate orange is one of the rootstocks most used worldwide mainly because it provides excellent quality fruit production. Harvest at the correct time is among factors that determine the physiological quality of seeds. The aim of this study was to identify physicochemical changes in ‘Limeira-IAC382’ trifoliate orange fruits, searching for the ideal harvest moment to obtain high quality seeds. Fruits were harvested at 180, 210 and 240 days after anthesis, stored in cold chamber and evaluated at 0, 15, 30 and 45 days of storage. The following variables were determined: mass loss, fruit color index, soluble solids, total titratable acidity and fruit juice ratio. Seeds were manually extracted and dried until reaching 30% water content. Seeds were used for the performance of germination, electrical conductivity and greenhouse seedling emergence tests. Seeds from fruits harvested at 240 DAA showed higher germination and greenhouse seedling emergence percentage compared to the other treatments until 30 and 45 days of storage in cold chamber, respectively. Storage for 45 days in cold chamber of fruits harvested at 210 DAA increases seed germination rate and the percentage of seedlings from seeds harvested at 180 DAA. It could be concluded that the harvesting of ‘Limeira-IAC382’ trifoliate orange fruits should be performed when fruits reached yellowish peel and low juice ratio, aiming at obtaining seeds with physiological quality.

scholarly journals QUALIDADE SANITÁRIA DE SEMENTES DE Caesalpinia ferrea: INCIDÊNCIA DE FUNGOS, CONTROLE E EFEITOS NA QUALIDADE FISIOLÓGICA COM O USO DE EXTRATOS VEGETAIS

FLORESTA ◽  
2014 ◽  
Vol 45 (1) ◽  
pp. 163 ◽  
Author(s):  
José George Ferreira Medeiros ◽  
Aderson Costa Araujo Neto ◽  
Edcarlos Camilo Silva ◽  
Min Fu Nascimento Huang ◽  
Luciana Cordeiro Nascimento
Keyword(s):  
Seed Germination ◽  
Aspergillus Flavus ◽  
Plant Extracts ◽  
Germination Rate ◽  
Antimicrobial Properties ◽  
Momordica Charantia ◽  
Alternative Control ◽  
Penicillium Sp ◽  
Physiological Quality

As sementes são eficientes meios de disseminação e transmissão de patógenos e, frequentemente, introduzem novos focos de infecção em áreas isentas. A utilização de extratos de plantas com propriedades antimicrobianas são alternativas ecológicas e promissoras para substituir a proteção promovida pela aplicação de fungicidas. Assim, objetivou-se avaliar o efeito dos extratos de alamanda (Allamanda blanchetti L.) e melão-de-são-caetano (Momordica charantia L.) sobre a micoflora e a germinação de sementes de Caesalpinia ferrea. Para tanto, utilizaram-se lotes de sementes coletados em diferentes municípios paraibanos (Areia, Bananeiras, Conde e Remígio), os quais foram submetidos aos testes de sanidade e de germinação. Os tratamentos fitossanitários consistiram de Testemunha; Fungicida dicarboximida (240 g.100 kg-1) e extratos A. blanchetti e M. charantia nas concentrações de 10, 100, 500 e 1000 ppm. Constataram-se os fungos Aspergillus flavus, A. niger, Cladosporium sp., R. stolonifer, Penicillium sp. e Nigrospora sp. nas sementes de C. ferrea. Os extratos de A. blanchetti e M. charantia nas concentrações de 500 e 1000 ppm reduziram a incidência de fungos. As maiores concentrações (500 e 1000 ppm) de ambos os extratos promoveram o aumento no percentual e na velocidade de germinação (IVG), bem como no comprimento das plântulas de C. ferrea.Palavras-chave: Patologia de sementes; micoflora; controle alternativo; germinação. AbstractSanitary quality of Caesalpinia ferrea seeds: incidence of fungi, control and effects on physiological quality with the use of plant extracts. Seeds are efficient to dissemination and transmission of pathogens and often introduce new foci of infection in exempted areas. The use of plant extracts with antimicrobial properties are promising and environmentally friendly alternatives to replace the protection promoted by the application of fungicides. We aimed to evaluate the effect of extracts of Allamanda blanchetti L. and Momordica charantia L. on the mycoflora and seed germination of Caesalpinia ferrea. We used lots of seeds collected in different cities of Paraiba (Areia, Bananeiras, Conde e Remígio), which were tested for germination and sanity. The phytosanitary treatments consisted of control, dicarboximide fungicide (240 g.100 Kg-1) and extracts of A. blanchetti and M. charantia at concentrations of 10, 100, 500 and 1000 ppm. We identified in the seeds of C. ferrea fungi Aspergillus flavus, A. niger, Cladosporium sp., R. stolonifer, Penicillium sp. and Nigrospora sp. The extracts of A. blanchetti and M. charantia in concentrations of 500 and 1000 ppm reduced the incidence of fungi. The highest concentrations (500 and 1000 ppm) of both extracts increased percentage and germination rate (IVG) and length of seedlings of C. ferrea.Keywords: Pathology seed; mycoflora; alternative control; germination.

scholarly journals Conditioning in the promotion and uniformization of Umbu seed germination

2018 ◽  
Vol 40 (1) ◽  
Author(s):  
Renato Teo Barros ◽  
Cibele Chalita Martins ◽  
Francisco Elder Carlos Bezerra Pereira ◽  
Givanildo Zildo da Silva
Keyword(s):  
Electrical Conductivity ◽  
Seed Germination ◽  
Water Content ◽  
Environmental Conditions ◽  
Seed Quality ◽  
Germination Rate ◽  
Ambient Conditions ◽  
Germination Test ◽  
Mean Germination Time ◽  
Cold Chamber

Abstract Seed dormancy may decrease during storage and some environmental conditions may accelerate this process. The aim of this work was to determine efficient techniques to condition umbu seeds in order to promote and standardize their germination. Seeds were stored for 180 days in paper bags kept in five ambient conditions: laboratory (25 ºC and 55% RH); warm oven (40 °C and 53% RH); hot oven (50 °C and 49% RH); dry chamber (18 °C and 65% RH) and cold chamber (10 °C and 65% RH). Seed quality was evaluated every 60 days by means of the following tests and determinations: water content; germination test (25 °C and 55% RH, weekly evaluated up to 91 days after sowing); first count test (14 days); germination rate index; mean germination time and electrical conductivity. The conditioning of umbu seeds in laboratory, or in warm oven (40 ºC) used efficient techniques to promote and standardize germination; under these conditions, after six months of storage, germination increased from 31% to 84 and 74%, respectively.

scholarly journals Germinación de un tipo venezolano de Capsicum chinense Jacq.: influencia de la maduración del fruto y de la extracción de la semilla desde el fruto

2020 ◽  
Vol 19 (1) ◽  
pp. 45-63
Author(s):  
Luz Garrido ◽  
Hernan Laurentin
Keyword(s):  
Seed Germination ◽  
Fruit Ripening ◽  
Germination Rate ◽  
Sweet Pepper ◽  
Germination Percentage ◽  
Factorial Experiment ◽  
Capsicum Chinense ◽  
Fruit Maturation ◽  
Dependent Variables ◽  
Seed Extraction

A type of sweet pepper of the species Capsicum chinense defines the Venezuelan cuisine, but this has not been enough to perform detailed studies of production issues in this crop. To determine the influence of fruit ripening, and seed extraction from the fruit on seed germination of a Venezuelan type of Capsicum chinense, a factorial experiment with 10 replications was conducted. Influence of the six combinations between three fruit maturation levels (green fruits, early-ripe fruits, and totally-ripe fruits) and two seed extraction moments of seed from the fruits (at the same day of the harvest and seven days after the harvest) were evaluated on seed germination percentage and days number to germination. Each replication consisted of 100 seeds, and seed germination was recorded for ten days. Results displayed no interaction between fruit ripening and extraction of seed for both dependent variables, but significant differences (P<0,01) were recorded for germination percentage among fruit ripening levels (the same for totally yellow and fruits changing color, but higher than green fruits), and between separation moment of seed from the fruits (seven days after the harvest resulted in 80% more germination rate as compared to seed separated at the same day of the harvest). Significant differences (P<0,01) were recorded also for the number of days to germination: seeds extracted from early- and totally-ripe fruits did not have significant differences (P>0,05) and germinated in 7,30 days in average, but they germinated faster (P<0,01) than seeds coming from green fruits which germinated in 8,40 days in average; seeds extracted from fruit 7 days after harvest germinated in 6,50 days in average, faster (P<0,01) than seeds extracted from the fruit the same day of harvest (8,75 days in average). Seeds of this type of sweet pepper germinate more abundantly and faster when they are separated from ripening fruits seven days after harvest.

scholarly journals Harvesting, processing and quality control of oil radish seeds

2014 ◽  
Vol 36 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Marcela Carlota Nery ◽  
Maria Laene Moreira de Carvalho ◽  
Andréa dos Santos Oliveira ◽  
Joelma Pereira ◽  
Fernanda Carlota Nery
Keyword(s):  
Chemical Composition ◽  
Maturation Stage ◽  
Ambient Conditions ◽  
Harvesting Time ◽  
High Lipid ◽  
Dry Conditions ◽  
Health Quality ◽  
Physiological Quality ◽  
Cold Chamber ◽  
The Ideal

The oil radish siliques maturation occurs in a non-uniform way, which makes it difficult to define the ideal harvesting time in order to produce high quality seeds. In addition, the high lipid content of the seed may hamper its preservation. To evaluate the effect of the maturation stage at harvesting on the physiological quality and chemical composition of the oil radish seeds stored under different conditions, the siliques were harvested at three stages, according to three colors: green, beige and brown. Seeds from different siliques harvesting stages were stored at ambient conditions and in a cold chamber under dry conditions (10 ºC and 46% RH) and evaluated as to their physiological and health quality and chemical composition before being stored and after 3, 6 and 9 months of storage. The siliques color is not the ideal indicator to define the oil radish seeds harvesting time due to the variation of the maturity and physiological quality of oil radish seeds within the siliques. The oil radish seeds storage in cold chamber preserves the physiological quality as assessed by the emergence test. There were no consistent changes in the centesimal composition of oil radish siliques harvested at different stages of maturation in relation to their color alteration.

scholarly journals Maturation and physiological quality of IAC-863 Rangpur lime seeds

2019 ◽  
Vol 10 (4) ◽  
pp. 454-460
Author(s):  
Marília Morelli ◽  
Fernando Alves de Azevedo ◽  
Patrícia Marluci da Conceição ◽  
Ana Julia Borim de Souza
Keyword(s):  
Germination Rate ◽  
Physicochemical Analysis ◽  
Soluble Solids ◽  
Rangpur Lime ◽  
Physicochemical Changes ◽  
Physiological Quality ◽  
Solids Content ◽  
Citrus Seeds ◽  
The Ideal

There is a growing demand for high quality seeds to obtain citrus rootstocks. Normative Instruction 48 (MAPA) of September 24, 2013, requires minimum of 50% germination for the marketing of citrus seeds. Harvest season is one of the stages of seed production with great importance to ensure quality, which makes knowing its maturation process an important step. Thus, the objective of this study was to monitor physicochemical changes in IAC-863 Rangpur lime fruits in order to characterize the physiological maturity of seeds, and to define the ideal harvest point in order to obtain seeds with high physiological quality to obtain rootstocks. Physicochemical analysis of fruits (mass loss, color, soluble solids and acidity) and analysis of seeds (water content, germination and emergence) was performed. Higher germination results were observed in seeds obtained from fruits with higher color index and soluble solids content. The storage of IAC-863 Rangpur lime fruits after harvest increases germination rate, especially in mid-season fruits.

scholarly journals Storage of 'Swingle' citrumelo seeds in different maturation stages subjected to fungicide treatment

2011 ◽  
Vol 33 (4) ◽  
pp. 768-776 ◽  
Author(s):  
Tanismare Tatiana de Almeida Silva ◽  
Renato Mendes Guimarães ◽  
Édila Vilela de Resende Von Pinho ◽  
Luciana Aparecida de Souza Abreu
Keyword(s):  
Seed Quality ◽  
Long Term Storage ◽  
Maturation Stages ◽  
Pathogen Control ◽  
Physiological Quality ◽  
Polyethylene Bags ◽  
Citrus Orchards ◽  
Time Required ◽  
Cold Chamber ◽  
Swingle Citrumelo

The establishment of citrus orchards with rootstocks from seed with a low physiological quality has been a recurring problem. Low quality seeds directly affect both the final stand and the time required for seedling production. The irregular maturation of fruits, seed recalcitrance, and the high incidence of fungi, make long term storage difficult, even at low temperatures. This study evaluated the storage potential and the use of fungicide treatments on 'Swingle' citrumelo seeds extracted from fruits collected at two maturation stages, green or ripe. The seeds were subjected to a thermal treatment, treated with Derosal, Thiram or Tecto+Captan fungicides, packaged in impermeable polyethylene bags and stored in a cold chamber for nine months. Every three months, the physiological and sanitary qualities of the seeds were evaluated from germination and sanitary tests and also from enzyme profiles. Seeds from green fruits deteriorated less than those from mature fruits; deterioration increased up to nine months of storage; treatment with the Tecto+Captan mixture gave effective pathogen control and maintained seed quality during storage. The germination of the green and ripe seeds is satisfactory (70%) after three months storage.

scholarly journals Effect of nitrogen sources on fruit characteristics and seed physiological quality of Physalis angulata L.

2019 ◽  
Vol 49 ◽  
Author(s):  
Tamara Torres Tanan ◽  
Alismário Leite da Silva ◽  
Uasley Caldas de Oliveira ◽  
Lourival Palmeira Gonçalves Neto ◽  
Marilza Neves do Nascimento
Keyword(s):  
Germination Rate ◽  
Nitrogen Sources ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Germination Test ◽  
Uniformity Coefficient ◽  
Physiological Quality ◽  
Mean Germination Time ◽  
Physalis Angulata

ABSTRACT Choosing an appropriate nitrogen source is of utmost importance, since it affects the plant development and fruit and seed yield. This study aimed to evaluate the quality of Physalis angulata fruits and seeds obtained from plants grown in a hydroponic system, under different concentrations of nitrate and ammonium. The treatments consisted of four NO3-:NH4+ ratios (100:0, 75:25, 50:50 and 25:75). After full grown, the fruits were collected for biometric and chemical analyses, and seeds were removed for the germination test. The germination test was conducted in a germination chamber and the parameters evaluated were the germination rate, mean germination time, speed, germination uniformity coefficient and relative frequency. Fruits with lower weight and diameter were obtained at doses above 50 % of ammonium; however, there was an increase for ºBrix and soluble solids/titratable acidity ratio. Such dosage also reduced the rate, speed and uniformity of germination. The combined use of nitrogen sources (50:50 of NO3-:NH4+) is recommended, because it produces larger and sweeter fruits with vigorous seeds.

scholarly journals TEMPERATURE - GERMINATION RESPONSES OF SUNFLOWER (Helianthus annuus L.) GENOTYPES / GERMINACION COMO REACCION A LA TEMPERATURA EN LOS GENOTIPOS DEL GIRASOL (Helianthus annuus L.) / GERMINATION - RÉACTION À LA TEMPÉRATURE DANS LES GÉNOTYPES DE TOURNESOL (Helianthus annuus L.)

Helia ◽  
2000 ◽  
Vol 23 (33) ◽  
pp. 97-104
Author(s):  
F.M. Khalifa ◽  
A.A. Schneiter ◽  
E.I. El Tayeb
Keyword(s):  
Seed Germination ◽  
Helianthus Annuus ◽  
Maximum Rate ◽  
Germination Rate ◽  
Thermal Time ◽  
Large Temperature ◽  
Climatic Zones ◽  
Helianthus Annuus L ◽  
Wide Range ◽  
Cardinal Temperature

SUMMARY Seed germination of six sunflower (Helianthus annuus L.) hybrids was investigated across a range of eleven constant temperatures between 5°C and 45°C. Large temperature differences in germination rate 1/t (d-1), cardinal temperature (°C) and thermal time θ (°cd) were observed among hybrids. Base temperatures (Tb) varied between 3.3°C and 6.7°C whereas maximum germination temperatures (Tm) varied between 41.7°C and 48.9°C. Final germination fraction was attained at 15°C - 25°C whereas the maximum rate of germination was attained at 30.4°C - 35.6°C. The maximum germination rate of hybrid USDA 894, the cultivar with the slowest germination rate, was only 50% of that of hybrid EX 47. The low Tb and high Tm of sunflower appear to be one of the factors which explain the successful adaptation of sunflower to a wide range of temperature. These findings are discussed in relation to the origin of the crop and its wide adaptations in diverse habitats and climatic zones.

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