scholarly journals Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

2019 ◽  
Vol 10 (4) ◽  
pp. 461-466
Author(s):  
Patrícia Marluci Da Conceição ◽  
Fernando Alves De Azevedo ◽  
Gerhard Vitor Ecker ◽  
Marilia Morelli ◽  
Mariangela Cristofani-Yaly
Keyword(s):  
Storage Time ◽  
Germination Rate ◽  
Poncirus Trifoliata ◽  
Citrus Fruits ◽  
Rangpur Lime ◽  
Brazilian Legislation ◽  
Physiological Quality ◽  
Citrus Seeds ◽  
Fruit Mass

Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.

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 Osmotic priming methodologies in relation to the physiological performance of rangpur lime seeds (Citrus limonia Osbeck)

2010 ◽  
Vol 32 (3) ◽  
pp. 141-151 ◽  
Author(s):  
Ísis Barreto Dantas ◽  
Renato Mendes Guimarães ◽  
Édila Vilela de Rezende Von Pinho ◽  
Maria Laene Moreira de Carvalho
Keyword(s):  
Seedling Emergence ◽  
Potassium Nitrate ◽  
Percentage Germination ◽  
Promising Technique ◽  
Peg 6000 ◽  
Physiological Performance ◽  
Rangpur Lime ◽  
Physiological Quality ◽  
Citrus Seeds

Several mechanisms have been used to promote rapid germination of citrus seeds and uniform seedling emergence. We evaluated the effects of osmotic priming on the physiological performance of Rangpur lime seeds (Citrus limonia Osbeck). Seeds were treated with 30 g of Captan and 10 g of Tecto 600 in 20-litre batches and stored, without drying, at 10 ºC and 50% relative humidity for periods of 3, 6 and 9 months. After each period, seeds were primed at 25 ºC, in the light, by immersion in Poliethylenoglicol (PEG 6000), potassium nitrate (KNO3) and 70% PEG 6000 plus 30% KNO3, all at an osmotic potential of -1.1MPa, for priming periods of 3, 6, 9 and 12 days. Percentage germination, tray emergence and the emergence rate index (ERI) were evaluated. Priming in PEG 6000 solution, independent of priming period, or in KNO3 or PEG 6000 plus KNO3 for up to 9 days, were efficient at improving the physiological performance of seeds stored for up to 3 months. Osmotic priming appears to be a promising technique for improving the physiological quality of Rangpur lemon seeds.

scholarly journals ELECTRICAL CONDUCTIVITY AND QUALITY OF DIFFERENT UMBEL ORDER CARROT SEEDS

2020 ◽  
Vol 9 (04) ◽  
pp. 75-81
Author(s):  
Luana de Souza Marinke ◽  
Hugo César Rodrigues Moreira Catão ◽  
Gabrielly Fernanda Francisco ◽  
Ítala Menegon Castilho ◽  
Letícia Rodrigues de Oliveira ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Germination Rate ◽  
Statistical Design ◽  
Germination Test ◽  
Aerial Portion ◽  
Initial Characterization ◽  
Different Temperatures ◽  
Physiological Quality ◽  
Final Score

Carrot seeds exhibit irregular vigor due to the wide blooming period of the crop. Results from germination tests are insufficient to evaluate the physiological potential. Thus, vigor tests are used in combination with germination tests. The objective of this work was to evaluate the quality of carrot seeds from different umbel order and the electrical conductivity under different temperatures and imbibing periods. Carrot seeds from cultivar Brasilia were used to perform the experiments. Content of water, the first and the final score of the germination test, index of germination rate, and length of roots and of the aerial portion were determined in the initial characterization. The electrical conductivity test was completed with replicates containing 50 seeds, in 25 mL deionized water at 20, 25 and 30oC. Evaluations were performed with 2, 4, 6, 8, 12 and 24 hours of imbibing period. The experiment was accomplished under a completely random statistical design. The quality of carrot seeds varied according to the umbel order. Seeds of secondary umbels showed better physiological quality. The electrical conductivity test is efficient to evaluate the vigor of carrot seeds with 8 hours of imbibing period at 25°C.

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 Vigor tests in assessing the quality of signal grass seeds

2017 ◽  
Vol 38 (6) ◽  
pp. 3491
Author(s):  
Paulo Alexandre Fernandes Rodrigues de Melo ◽  
Tatiane Sanches Jeromini ◽  
Carlos Eduardo Affonso ◽  
Edna Ursulino Alves ◽  
Cibele Chalita Martins
Keyword(s):  
Germination Rate ◽  
Pearson Correlation ◽  
Seedling Emergence ◽  
Control Program ◽  
Brachiaria Brizantha ◽  
Quality Control Program ◽  
Market Requirements ◽  
Physiological Quality ◽  
Germination Vigor

The correct assessment of the physiological quality of seed lots is necessary for the quality control program of companies. For such purpose, tests that detect differences in the physiological potential of seed lots and that meet the minimum market requirements. Thus, the study was conducted towards assessing the efficiency of laboratory tests in differentiating the quality of Brachiaria brizantha cv. Xaraés seed lots. Seeds from nine lots were assessed regarding water content, germination, first germination count, electrical conductivity and seedling emergence in sand in the laboratory (normal seedlings, first count and germination rate index), and the results were compared with those from the seedling emergence test conducted in the field. The experimental design used was completely randomized, with four replicates, and the Pearson correlation coefficient between the values from the germination, vigor and field seedling emergence tests was determined. The germination and seedling emergence in sand tests and the seedling emergence rate index efficiently assess the physiological quality of Brachiaria brizantha cv. Xaraés seed lots, providing data similar to those from seedling emergence in the field.

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 Performance of ‘Cadenera’ orange trees grafted on five rootstocks

2018 ◽  
Vol 40 (4) ◽  
Author(s):  
Allan Ricardo Domingues ◽  
Carmen Silvia Vieira Janeiro Neves ◽  
Inês Fumiko Ubukata Yada ◽  
Rui Pereira Leite Junior ◽  
Zuleide Hissano Tazima
Keyword(s):  
Productive Efficiency ◽  
Poncirus Trifoliata ◽  
Rangpur Lime ◽  
Pests And Diseases ◽  
Yield And Quality ◽  
Growth Production ◽  
Orange Trees ◽  
Canopy Size ◽  
Swingle Citrumelo

Abstract Citriculture is an important alternative for the agribusiness development in the state of Paraná, Brazil. However, the use of a few cultivars of scion and rootstock restricts the harvest period and increases the vulnerability to pests and diseases. This study aimed to evaluate the vegetative growth, production and fruit quality of ‘Cadenera’ orange trees (Citrus sinensis (L.) Osbeck ) grafted on five rootstocks, during nine harvests, under a subtropical environmental condition. The experimental design was randomized blocks with six replications, two plants per plot, and five rootstocks: ‘Rangpur’ lime (C. limonia Osb.), ‘Cleopatra’ (C. reshni hort. ex Tanaka ) and ‘Sunki’ mandarins (C. sunki hort. ex Tanaka (L.) Raf.), ‘Swingle’ citrumelo [C. paradisi Macfad. x Poncirus trifoliata (L.) Raf.], and ‘C-13’ citrange [C. sinensis (L.) Osbeck cv. Pera x P.s trifoliata (L.) Raf.]. Biometric variables, and fruit yield and quality were analyzed. The smallest canopy size was induced by ‘Rangpur’ lime and ‘C 13’ citrange rootstocks. ‘Swingle’ citrumelo and ‘C 13’ citrange provided the highest yields for the ‘Cadenera’ sweet orange trees and were superior to ‘Rangpur’ lime. Trees grafted on ‘C 13’ citrange presented the highest yield and productive efficiency.

scholarly journals Physiological quality of osmoprimed Eremanthus erythropappus (D.C.) MacLeish seeds

2020 ◽  
Vol 13 (5) ◽  
pp. 18
Author(s):  
A. M. S. Oliveira ◽  
A. A. Silva ◽  
M. C. Vasconcelos ◽  
J. A. A. Granja ◽  
J. M. R. Faria ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Germination Rate ◽  
Seed Priming ◽  
Potassium Nitrate ◽  
The Other ◽  
Other Substances ◽  
Physiological Quality ◽  
Glycol Solution ◽  
Polyethylene Glycol 6000

Physiological conditioning is a technique that consists in controlling the speed of water uptake by seeds, with osmotic solutions, aiming to improve their quality, reducing time and increasing germination rate. Eremanthus erythropappus (D.C.) MacLeish seeds were subjected to priming with polyethylene glycol 6000 (PEG), potassium nitrate (KNO3) and the combination of the two at the concentrations of 0.4; -0.8; -1.0; -1.2 and -1.4 MPa for four, six and eight days. Germination, germination speed index (GSI), emergence, emergence speed index (ESI) and expression of superoxide dismutase (SOD), catalase (CAT) and peroxidase (PO) enzymes were assessed. E. erythropappus seed priming in polyethylene glycol solution with potentials between -0.8 MPa and -1.4 MPa is not satisfactory because it adversely affects germination and reduces the activity of peroxidase and catalase enzymes. The other substances were not significant so there is a need for further research with other substances and / or concentrations

scholarly journals Effect of the storage of soybean seeds treated with agrochemicals on the physiological quality and on the seedlings morphology

2020 ◽  
Vol 6 ◽  
pp. 1-8
Author(s):  
João Pedro Garcia Nogueira ◽  
Danúbia Aparecida Costa Nobre ◽  
Guilherme Ferreira Alves ◽  
Éder Matsuo ◽  
Willian Rodrigues Macedo
Keyword(s):  
Seed Treatment ◽  
Storage Time ◽  
Soybean Seeds ◽  
Initial Development ◽  
Soybean Seedlings ◽  
Anthranilic Diamide ◽  
Seedling Length ◽  
Physiological Quality ◽  
The One

Seed treatment is the most efficient technique for controlling pests and pathogens that can influence the initial development of the crop. However, storing treated seeds may damage the physiological quality. Thus, the objective of this study was to evaluate the influence of storage on the physiological quality of treated soybean seeds and on the morphology of soybean seedlings. The treatments were carried out with Fludioxonil, Imidacloprid and Anthranilic Diamide, in the dosage of 200, 150 and 100 mL of the commercial product 100 kg of seeds, respectively, from the cultivar BRSMG752S. The experimental designs used were randomized blocks (greenhouse) and completely randomized (laboratory), in a simple factorial 4x4scheme, with 4 sowing times (30, 20, 10 and 0 days after treatments) and 4 treatments (3 products and untreated seeds) with 4 repetitions. The treatment of soybean seeds with Anthranilic Diamide submitted to different storage periods was the one with the closest physiological quality to the treatment without application of agrochemicals. The soybean seeds treated with Imidacloprid showed a reduction in physiological quality with the storage time, reduction (in general) in the root length and presented a lower seedling length at 20 days of storage.

scholarly journals Physiological performance of wheat seeds treated with micronutrients and protection products during storage

2017 ◽  
Vol 39 (2) ◽  
pp. 182-188 ◽  
Author(s):  
Joice Aline Freiberg ◽  
Marcos Paulo Ludwig ◽  
Suemar Alexandre Gonçalves Avelar ◽  
Eduardo Girotto ◽  
Darlan de Maria Eickstedt ◽  
...  
Keyword(s):  
Moisture Content ◽  
Seed Treatment ◽  
Storage Time ◽  
Accelerated Aging ◽  
High Quality ◽  
Physiological Performance ◽  
Physiological Quality ◽  
Wheat Seeds

Abstract: Seeds with high quality are one of the important factors to consider in the crops establishment on field. Therefore, the physical and physiological quality of wheat seeds treated with mixes of micronutrients including zinc and protective products were aimed. The wheat seeds were analyzed in a factorial scheme 5x3x4, with five storage time: 0, 60, 120, 180 and 240 days; three micronutrients: micronutrients 1 (1% Mn; 0.1% Mo; 10% Zn); micronutrients 2 (0.3% B; 0.3% Co; 3% Zn) and no micronutrients, and four protective products: untreated seeds, polymer (Colorseed He), fungicide carboxin + thiram (Vitavax® Thiram 200 SC) + insecticide thiamethoxam (Cruiser® 350 FS) and polymer + fungicide + insecticide. After treatment, the seeds were stored under uncontrolled conditions for 240 days and at intervals of 60 days, the germination, accelerated aging and moisture content were determined. Wheat seeds untreated and treated with polymer have the best physiological performance during storage, regardless micronutrients treatments. The wheat seeds treated with carboxin + thiram + thiamethoxam and polymer + carboxin + thiram + thiamethoxam can be storage up to 120 days, under uncontrolled conditions, regardless micronutrients treatments. The seed treatment does not alter the moisture content of wheat seeds.

Sign in / Sign up

Export Citation Format

Share Document