Germination dynamics of sesame seeds under salt stress

Sesame crops have large economic potential; however, the scarcity of good quality water in the Semiarid region of the Northeast of Brazil can affect production systems, which requires the search for cultivars that can better be adapted to the local conditions. In this context, the objective of this work was to evaluate the germination dynamics of sesame seed lots subjected to different electrical conductivities of the imbibition solution. The experiment was conducted at the Laboratory of Seeds and Seedling Analysis of the Federal University of Campina Grande, Pombal campus, Paraíba, Brazil. A completely randomized design was used, in an 8×6 factorial arrangement, corresponding to eight seed lots (BRS Seda; BRS Seda (S2); BRS G2 (S1); BRS G2 (S2); BRS G3 (S1); BRS G3 (S2); BRS G4 (S1) and BRS G4 (S2), where S1 and S2 represent the grown environments, saline (2.4 dS m-1) and non-saline, respectively; and six electrical conductivities of the imbibition solution (0.3; 1.2; 2.1; 3.0; 3.9; and 4.8 dS m-¹), with four replications. The variables seed germination, vigor, germination speed index, mean time for germination, mean germination speed, and radicle length were evaluated. The sesame seeds are sensitive to salinity, regardless of the lot analyzed and their germination power decreases when they are subjected to high salt concentrations.Sesame crops have large economic potential; however, the scarcity of good quality water in the Semiarid region of the Northeast of Brazil can affect production systems, which requires the search for cultivars that can better be adapted to the local conditions. In this context, the objective of this work was to evaluate the germination dynamics of sesame seed lots subjected to different electrical conductivities of the imbibition solution. The experiment was conducted at the Laboratory of Seeds and Seedling Analysis of the Federa

Quality of cookies with partial substitution of wheat flour for okra flour

Okra is a vegetable of high nutritional value, but highly perishable when stored in natura. Cookies are products of great popular acceptance and allow the use of alternative flours. The objective was to evaluate cookies made with partial substitution of wheat flour for okra. Okra fruits were dried to obtain the flour. This was applied in biscuit formulations at concentrations of 0 (A), 5 (B), 10 (C) and 15% (D). The cookies were evaluated for the difference in mass, thermal factor, yield, humidity, ash, fibers, proteins, lipids, carbohydrates, caloric value, presence of Coliforms at 45 ° C, positive coagulase Staphylococcus and Samonella sp., In addition to the sensory evaluation acceptance and purchase intention. The dough, ash content, fiber and protein of the cookies enriched with okra flour were higher. The carbohydrate content and caloric value was higher in formulation A. All cookies are within the microbiological standards required by law. Sensory acceptance and purchase intention were superior in formulations A and B. The differences between the cookies are due to the different composition of the okra and vary according to the concentration in which it is added. Formulation B obtained better nutritional quality without interfering with its good sensory acceptance.Okra is a vegetable of high nutritional value, but highly perishable when stored in natura. Cookies are products of great popular acceptance and allow the use of alternative flours. The objective was to evaluate cookies made with partial substitution of wheat flour for okra. Okra fruits were dried to obtain the flour. This was applied in biscuit formulations at concentrations of 0 (A), 5 (B), 10 (C) and 15% (D). The cookies were evaluated for the difference in mass, thermal factor, yield, humidity, ash, fibers, proteins, lipids, carbohydrates, caloric value, presence of Coliforms at 45 ° C, positive coagulase Staphylococcus and Samonella sp., In addition to the sensory evaluation acceptance and purchase intention. The dough, ash content, fiber and protein of the cookies enriched with okra flour were higher. The carbohydrate content and caloric value was higher in formulation A. All cookies are within the microbiological standards required by law. Sensory acceptance and purchase intention were superior in formulations A and B. The differences between the cookies are due to the different composition of the okra and vary according to the concentration in which it is added. Formulation B obtained better nutritional quality without interfering with its good sensory acceptance

Initial growth of Calendula officinalis L. plants treated with paclobutrazol

Calendula officinalis L. is largely used in composition in beds and like cutted flowers. On the other hand, the height (30 – 60 cm), difficult the cultivate and sales like potted plant, owing to the tipping of pots and for the disposition of plants on the tables.  Paclobutrazol (PBZ) is a vegetal regulator that reduces the growth of plants.   The purpose of this study was to evaluate the initial growth of C. officinalis L. treated with PBZ. The experiment was conducted in a greenhouse in the Floriculture Sector, of Agronomy Department, of Universidade Federal de Viçosa in October a November of 2020. The experiment was conducted in complety randomized desing and treatments were control, 2500, 5000, 7500 e 10000 ppm of PBZ doses with five repetitions. Two applications of PBZ doses were realized, being the first 15 days and the second 30 days after transplantation.  Plant height, leaf area, stem length and diameter, root length, leaves number and photosynthetic pigments were quantified.   PBZ, regardless of concentration, reduced plant heigth, leaf area, stem length, and diameter. Root length, leaves number and photossyntetic pigments did not significant among doses aplied. The initial growth of C. officinalis L. was reduced with PBZ doses.Calendula officinalis L. is largely used in composition in beds and like cutted flowers. On the other hand, the height (30 – 60 cm), difficult the cultivate and sales like potted plant, owing to the tipping of pots and for the disposition of plants on the tables.  Paclobutrazol (PBZ) is a vegetal regulator that reduces the growth of plants.   The purpose of this study was to evaluate the initial growth of C. officinalis L. treated with PBZ. The experiment was conducted in a greenhouse in the Floriculture Sector, of Agronomy Department, of Universidade Federal de Viçosa in October a November of 2020. The experiment was conducted in complety randomized desing and treatments were control, 2500, 5000, 7500 e 10000 ppm of PBZ doses with five repetitions. Two applications of PBZ doses were realized, being the first 15 days and the second 30 days after transplantation.  Plant height, leaf area, stem length and diameter, root length, leaves number and photosynthetic pigments were quantified.   PBZ, regardless of concentration, reduced plant heigth, leaf area, stem length, and diameter. Root length, leaves number and photossyntetic pigments did not significant among doses aplied. The initial growth of C. officinalis L. was reduced with PBZ doses

O etileno afeta a qualidade fisiológica e a longevidade dos pimentos ornamentais em vaso

Ethylene triggers several deleterious responses on ornamental plants. This investigation aimed to evaluate several physiological responses to ethylene on the post-production of potted ornamental pepper cultivars. Plants of the ‘Espaguetinho’, ‘Etna’, ‘Peppa’ and ‘Karneval’ cultivars were grown in pots. When they reached the appropriate commercial stage, that is, 50% of the plants in a population showed at least 30% fully ripe fruits, they were treated as follows. Plants were subjected to external control, internal control, and exposure to 10 µL L-1 ethylene for 48 h. ‘Etna’ exhibited an intermediate response to the exposure to 10 µL L-1 ethylene for 48 h. ‘Espaguetinho’, ‘Peppa’ and ‘Karneval’ were classified as highly sensitive to ethylene, with discard on the first day of shelf life. The leaves from all cultivars showed a strong response to ethylene than the fruits. This study revealed different levels of sensitivity to ethylene depending on the cultivars and species. The exposure to 10 µL L-1 ethylene for 48 hours affects the quality and the longevity of the pepper cultivars evaluated, drastically reducing the shelf life. This study thus paves the way for further investigations to reduce ethylene responses, extending the shelf life in the post-production phase of pepper cultivars.O etileno desencadeia diversas respostas deletérias em plantas ornamentais. Esta investigação teve como objetivo avaliar as respostas do etileno na pós-produção de cultivares de pimenta ornamental em vasos. As plantas das cultivares 'Espaguetinho', 'Etna', 'Peppa' e 'Karneval' foram cultivadas em vasos e ao atingirem a fase de comercialização, ou seja, 50% das plantas com pelo menos 30% dos frutos totalmente maduros, foram submetidas aos tratamentos: controle externo, controle interno e exposição a 10 µL L-1 de etileno durante 48 horas. 'Etna' exibiu resposta intermediária à exposição a 10 µL L-1 de etileno por 48 horas. 'Espaguetinho', 'Peppa' e 'Karneval' foram classificados como altamente sensíveis ao etileno, com descarte no primeiro dia de vida útil. As folhas de todas as cultivares mostraram maior resposta ao etileno do que os frutos. A exposição a 10 µL L-1 de etileno por 48 horas afetou a qualidade e a longevidade das cultivares de pimenta avaliadas, reduzindo drasticamente a vida de prateleira. Este estudo permite, portanto, novas investigações de forma a reduzir as respostas ao etileno, prolongando a vida útil na fase de pós-produção das cultivares de pimenta

Combined fertilization with nitrogen-potassium to mitigate salt stress in okra

Okra (Abelmoschus esculentus) is sensitive to the salinity of water and soil, a common abiotic stress in the semi-arid region of northeastern Brazil; however, such sensitivity is variable with water management in the soil-plant-atmosphere system. Thus, the objective was to evaluate the fertilization with nitrogen-potassium combinations in okra cultivated under salt stress. Photosynthetic pigments, gas exchange, growth and fruit quality were evaluated. Fertilization with N1:K1 (40% N + 40% K2O) reduced the damage caused by salt stress and increased the chlorophyll contents, while the application of N4:K4 (130% N + 100% K2O) decreased the damage caused by salt stress and increased the carotenoid contents. The combination of N:K fertilization did not affect gas exchange, however, salt stress decreased these variables. Fertilization with N2:K2 (70% N + 60% K2O) reduced the damage caused by salt stress and increased the leaf area of okra. In addition, salt stress decreased the number of fruits and increased the fresh mass of okra fruits. The N:K fertilization also reduced the damage caused by salt stress and in the soluble solids content, titratable acidity, SS/TA ratio, and ascorbic acid content. Thus, N:K fertilization can be seen as an important agronomic strategy to improve the performance of okra quality subjected to saline conditions.Okra (Abelmoschus esculentus) is sensitive to the salinity of water and soil, a common abiotic stress in the semi-arid region of northeastern Brazil; however, such sensitivity is variable with water management in the soil-plant-atmosphere system. Thus, the objective was to evaluate the fertilization with nitrogen-potassium combinations in okra cultivated under salt stress. Photosynthetic pigments, gas exchange, growth and fruit quality were evaluated. Fertilization with N1:K1 (40% N + 40% K2O) reduced the damage caused by salt stress and increased the chlorophyll contents, while the application of N4:K4 (130% N + 100% K2O) decreased the damage caused by salt stress and increased the carotenoid contents. The combination of N:K fertilization did not affect gas exchange, however, salt stress decreased these variables. Fertilization with N2:K2 (70% N + 60% K2O) reduced the damage caused by salt stress and increased the leaf area of okra. In addition, salt stress decreased the number of fruits and increased the fresh mass of okra fruits. The N:K fertilization also reduced the damage caused by salt stress and in the soluble solids content, titratable acidity, SS/TA ratio, and ascorbic acid content. Thus, N:K fertilization can be seen as an important agronomic strategy to improve the performance of okra quality subjected to saline conditions

Crescimento e qualidade de pimentas ornamentais em vaso tratadas com paclobutrazol

The objective of this work was to evaluate the action of paclobutrazol (PBZ) on the growth and ornamental value of two pepper accessions and two commercial cultivars of ornamental pepper – Biquinho Vermelha and Bode Amarela. A PBZ aqueous solution (250 mL) was used to soak the substrate at 0, 20, 40, and 60 mg L-1 a.i. concentrations when the plants had 12 cm height. At the end of plant growth, the follwoing parameters were evaluated: plant height, chlorophyll content in leaves, number of fruit and leaves, and canopy compactness at the time the plants reached maturity to be marketed, with 30% of ripe fruit. Irrespective of the applied PBZ concentration, plant height diminished, and chlorophyll content increased. PBZ did not improve the ornamental characteristics of the genotypes 'Biquinho Vermelha' and 2334PB, which resulted in unsuitable plants for market requirements. For the genotypes 2345PB and 'Bode Amarela', the application of 20 mg L-1 of PBZ is the most indicated, and it results in plants with adequate ornamental characteristics required by the national market of flowers and ornamental plants.O objetivo deste trabalho foi avaliar a ação do paclobutrazol (PBZ) sobre o crescimento e valor ornamental de dois acessos e duas cultivares comerciais de pimenta ornamental – Biquinho Vermelha e Bode Amarela. Uma solução aquosa de 250 mL de PBZ foi adicionada aos vasos com 0, 20, 40 e 60 mg L-1 i.a., quando as plantas apresentavam 12 cm de altura. Ao final do crescimento, determinaram-se os seguintes parâmetros: a altura das plantas, o teor de clorofila das folhas, o número de frutos e de  folhas, e a compacidade da parte aérea no estádio de maturidade das plantas, com 30% de frutos maduros. Independentemente da concentração de PBZ aplicada, houve redução da altura das plantas e aumento da concentração de clorofila nas folhas. O PBZ não melhorou as características ornamentais dos genótipos 'Biquinho Vermelha' e 2334PB, o que resultou em plantas inadequadas aos requisitos do mercado. Para os genótipos 2345PB e 'Bode Amarela', a aplicação de 20 mg L-1 de PBZ é a mais indicada e resulta em plantas com características ornamentais adequadas requeridas pelo mercado nacional de flores e plantas ornamentais

Tempero líquido avalaliação da rotulagem em Currais Novos – RN / Liquid seasoning evaluation of labeling in Currais Novos - RN

Devido à popularização do tempero condimentado, os consumidores passaram a ser mais exigentes em relação à qualidade e aos ingredientes utilizados na composição do produto, buscando melhor entendimento dos rótulos contidos nesse produto. O objetivo do trabalho foi avaliar marcas de tempero condimentado líquido comercializados na cidade de Currais Novos, Rio Grande do Norte. Para isso, dez rótulos de diferentes marcas de tempero condimentado foram escolhidos aleatoriamente nos comércios de Currais Novos — RN. Por questões éticas, essas marcas foram nomeadas conforme as letras do alfabeto: A, B, C, D, E, F, G, H, I e J. Foram utilizadas tabelas do tipo check list segundo as informações nutricionais e obrigatórias fornecias pela legislação (RDCs n.º 259, 359, 360, 276 e a Lei n.º 10.674). Constatou-se que apenas duas das dez marcas analisadas apesentavam todos os quesitos solicitados segundo as exigências das legislações para rotulagem. Assim, conclui-se que as empresas produtoras de tempero líquido necessitam ter mais atenção à rotulagem de seus produtos para atender as necessidades dos consumidores

Evaluation of substrates and pruning the production of ornamental pepper

O cultivo de pimentas para fins de ornamentação apresenta forte apelo no mercado consumidor interno e externo. Este fato se deve as características de rentabilidade e agregação de valor ao produto. Além disso, o cultivo de pimenta tem grande importância sócio-econômica em virtude do emprego de elevado número de mão-de-obra. No entanto, o sucesso comercial desta atividade depende do apelo ao consumidor conferido pela harmonia do porte da planta com o recipiente utilizado, que é obtida através de poda, substratos, uso de reguladores, diferentes volumes de vaso, dentre outros. Assim, a presente pesquisa teve como objetivo determinar o efeito de substratos e da aplicação de poda na produção de quatro genótipos de pimenta (Pirâmide Ornamental, Biquinho, MG 7073 e BGH 1039). Foram avaliados dois tipos de substratos: substrato comercial (Bioplant®) e Terra de jardim adquirida em floricultura local e duas condições de poda; plantas conduzidas com 2 hastes e plantas com 3 hastes. Não houve diferença de precocidade entre as plantas cultivadas em substrato Bioplant® e Terra de Jardim, no qual os genótipos BGH 1039 e Pirâmide Ornamental atingiram o ponto ideal de comercialização aos 60 DAT. No entanto, neste mesmo período as plantas de ambos os genótipos que se desenvolviam em substrato Bioplant®, apresentaram maior altura de planta, altura total, diâmetro médio da copa, número de folhas e número de frutos por planta. Portanto, todas as variáveis de crescimento avaliadas foram influenciadas pelos diferentes substratos em todos os genótipos. Plantas que se desenvolveram no substrato Bioplant® apresentaram-se melhor desenvolvidas. A poda não alterou a precocidade dos genótipos BGH 1039 e Piramide Ornamental, os quais atingiram o ponto ideal de comercialização aos 60 DAT. A poda não foi efetiva para a cultivar Biquinho, o acesso MG 7073 e BGH 1039, pois aumentou o porte das plantas e tornou a copa assimétrica respectivemente. Entretanto, a poda conduzida em duas hastes foi efetiva para a cultivar Piramide Ornamental, proporcionando uma copa mais densa sem alterar a altura das plantas.Growing peppers for ornamental purposes has strong appeal in the consumer market and abroad. This fact is due to the characteristics of profitability and adding value to the product. Moreover, the cultivation of pepper has great socio-economic importance due to the employment of large numbers of skilled manpower. However, the commercial success of this activity depends on the consumer appeal conferred by the harmony of the plant with the container used, which is obtained by pruning, substrates, regulators use different volumes of vessel, among others. Thus, this study aimed to determine the effect of different substrates and the application of pruning in the production of four pepper genotypes (Pirâmide Ornamental, Biquinho, MG 7073, BGH 1039). Evaluated two types of substrates: commercial substrate (Bioplant®) and Land of garden flowers purchased in local and two pruning conditions, plants with two stems and plants with three stems. There was no difference in earliness between plants grown in substrate Bioplant® and Earth Garden, in which the genotypes BGH 1039 and Pirâmide Ornamental reached the spot trading at 60 DAT. However, in this same period the plants of both genotypes that were developed in substrate Bioplant® showed higher plant height, total height, crown diameter, leaf number and number of fruits per plant. Therefore, all growth variables evaluated were affected by different substrates in all genotypes. Plants that have developed in the substrate Bioplant® had to be better developed. The pruning did not affect the precocity of BGH 1039 genotypes and Pirâmide Ornamental, which reached the ideal point of sale at 60 DAT. The pruning was not effective for the Biquinho and access cultivar MG 7073, it increased the size of the plants and the canopy became asymmetric respective. However, both were effective pruning conditions for access to cultivate and BGH 1039, Pirâmide Ornamental, providing a denser canopy without changing the height of the plants.Conselho Nacional de Desenvolvimento Científico e Tecnológic

Action of paclobutrazol and 1-MCP on the ornamental quality of Capsicum species

Dentro da grande variabilidade genética no gênero Capsicum há plantas com grande potencial ornamental, mas com altura desconforme da exigida pelo mercado de plantas ornamentais. Além da adequação da altura, algumas espécies de pimenteiras apresentam baixa durabilidade na fase de pós-produção, principalmente, pela sensibilidade ao etileno. Diante deste cenário e dada a crescente importância das pimenteiras no mercado de horticultura ornamental, o objetivo desta pesquisa foi avaliar o efeito do paclobutrazol (PBZ) e do 1-MCP, sobre a qualidade de pimenteiras ornamentais. A aplicação de PBZ (25, 50 e 75 mg L-1) foi feita em sete genótipos de pimenteiras do Banco de Germoplasma da Universidade Federal de Viçosa (BGH/UFV) e 1 genótipo do Banco de Germoplasma da Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG). No acesso BGH 6371, a aplicação de PBZ mostrou-se ineficaz em alterar a arquitetura das plantas. Nos acessos BGH 1032 e BGH 1039, a aplicação de PBZ na concentração de 25 mg L-1 resultou em plantas com melhores características ornamentais, principalmente, altura e compacidade de copa. Considerando o custo/benefício, a dose indicada para os acessos BGH 4285, BGH 7073 e MG 302 é de 25 mg L-1 de PBZ. A aplicação de PBZ nos acessos BGH 4199 e BGH 4355, apesar de reduzir a altura da planta, não melhorou suas características ornamentais, resultando em plantas sem padrão de copa. Avaliou-se também a sensibilidade ao etileno de sete genótipos de pimenteiras ornamentais (variedades comerciais e acessos do BGH/UFV e da EPAMIG). Após a exposição das pimenteiras a 10 L L-1 de etileno por 48 horas, foi observado que as flores são altamente sensíveis ao etileno exógeno em todos os genótipos estudadas, à exceção da ‘Pimenta colorida’ que foi moderadamente sensível. Com relação a abscisão de folhas, a ‘Pimenta colorida’ e o ‘Pimentão ornamental’ são altamente sensíveis a aplicação de etileno; a ‘Pimenta Salsa Roxa’ moderamente sensível e os demais genótipos são insensíveis ao hormônio. Já os frutos responderam com o aceleramento da coloração, à exceção da ‘Pimenta laranja’ e ‘Laranja Ornamental’. O pré-tratamento com 1-MCP, independente da concentração aplicada, foi eficaz em bloquear a ação do etileno reduzindo em 100% a abscisão de folhas, flores e frutos de ambas os genótipos, ‘Pimenta Colorida’ e ‘Pimentão Ornamental’.The great genetic variability in the Capsicum genus there are plants with ornamental potential, but with higher not required by the market. In addition to the higher, some kinds of pepper have a low shelf life caused by sensitivity of the ethylene. The growing importance of pepper plants in the ornamental horticulture market, this study aimed to evaluate the effect of paclobutrazol (PBZ) and 1-MCP on the ornamental quality of ornamental pepper. The application of PBZ (0, 25, 50 and 75 mg L-1) was made on eight pepper genotypes from the Germplasm Bank of UFV. To access BGH 6371, the PBZ do not altering the architecture of plants. For the BGH and BGH 1032 1039 accesses the PBZ (25 mg L-1) resulted in ornamental plants with improved characteristics. Considering the cost/benefit, the best treatement was PBZ at 25 mg L-1 to BGH 4285 hits, BGH 7073 and MG. The PBZ in BGH 4355 and BGH 4199 reduced the plant height but do not improved ornamental characteristics, resulting in pattern without plant canopy. In a second phase of the study, we evaluated the sensitivity to ethylene seven genotypes of ornamental pepper plants (commercial varieties and access the Germplasm Bank of Universidade Federal de Viçosa). After exposure of pepper 10 μL L-1 of ethylene for 48 hours, it was observed that the flowers were highly sensitive to ethylene in all varieties except of ‘Pimenta colorida’ (moderately susceptible). Regarding the abscission of flowers, ‘Pimenta colorida’ and ‘Pimentão Ornamental’ were classified as highly sensitive to exogenous ethylene; ‘Pimenta Salsa Roxa’ was moderately sensitive and the other genotypes were insensitive to the hormone. The fruits responded by accelerating the color, except for the ‘Pimenta Laranja’ and ‘Laranja Ornamental’. When abscindiam, the highest rates were observed for the green fruit, followed by green-mature and mature fruits. The pre-treatment with 1-MCP, regardless of the applied concentration, was effective in blocking the action of ethylene reducing by 100% abscission of leaves, flowers and fruits of both the varieties. The pre-treated plants with 1-MCP increased the shelf life of eight and nine days to varieties ‘Pimenta Colorida’ and ‘Pimentão Oramental’ respectively. Therefore, the application of 1-MCP at a concentration of 0.5 g m-3 is effective in maintaining the ornamental quality and prolong the shelf life of ‘Pimentão Ornamental’ e ‘Pimenta Colorida’.Coordenação de Aperfeiçoamento de Pessoal de Nível Superio

Action of ethylene, 1-methylcyclopropene and silver thiosulfate in two developmental stages of potted ornamental pepper

The species of Capsicum genus have great genetic variability with enormous potential for marketing as ornamental potted plants. The exposure at ethylene induces various deleterious responses during plants life cycle, but there are few studies on how the ethylene affects early developmental stages of these ornamental plants. Thus, this study aimed to evaluate the effects of the application of ethylene and ethylene inhibitors, 1-methylcyclopropene (1-MCP) and silver thiosulphate (STS) in two early development stages (seedling or initial flowering) of potted ornamental peppers of the cultivars ‘Calypso’ and ‘MG 302’. Cultivar ‘MG 302’ showed intermediate sensitivity to ethylene, while the cultivar ‘Calypso’ showed complete abscission of leaves when exposed to 10 µl of ethylene for 48 hours in both development stages. Plants treated with 1-MCP showed similar durability to control for both varieties and developmental stages, and the treatment with 1-MCP + ethylene was beneficial only for ‘MG 302’. STS was the most efficient substance in delaying the ethylene, wherein at stage 1 there was no leaf abscission and at stage 2 had much reduced leaf abscission occurred, regardless the cultivar. Treatment with STS + ethylene was efficient only at stage 1 for ‘Calypso’ and at stage 2 for ‘MG 302’. According to the data, cultivars showed different levels of sensitivity to ethylene, ‘Calypso’ is very sensitive and ‘MG 302’ showed intermediate sensitivity. Regardless the cultivar, STS treatment significantly blocked the ethylene action in both development stages and the use of 1-MCP was less efficientAs espécies do gênero Capsicum possuem grande variabilidade genética com enorme potencial para comercialização como plantas ornamentais de vaso. A exposição ao etileno induz várias respostas deletérias durante o ciclo de vida das plantas, mas há poucos estudos sobre como o etileno afeta estádios iniciais do desenvolvimento dessas plantas ornamentais. Portanto, este estudo objetivou avaliar os efeitos da aplicação de etileno e inibidores de etileno, 1-metilciclopropeno (1-MCP) e tiossulfato de prata (STS) durante dois estádios de desenvolvimento iniciais (plântulas e floração inicial) de pimenteiras ornamentais das cultivares ‘Calypso’ e ‘MG 302’. A cultivar ‘MG 302’ apresentou sensibilidade intermediária ao etileno, enquanto a cultivar ‘Calypso’ apresentou abscisão completa das folhas quando exposta a 10 μl de etileno por 48 horas em ambos os estádios de desenvolvimento. As plantas tratadas com 1-MCP apresentaram durabilidade semelhante ao controle para ambas as variedades e estádios de desenvolvimento, já o tratamento com 1-MCP + etileno foi benéfico apenas para ‘MG 302’. STS foi a substância mais eficiente em retardar a ação do etileno, em que no estádio 1 não houve abscisão foliar e no estádio 2 houve abscisão foliar muito reduzida, independente da cultivar avaliada. O tratamento com STS + etileno foi eficiente apenas no estágio 1 para ‘Calypso’ e no estágio 2 para ‘MG 302’. De acordo com os dados, as cultivares apresentaram diferentes níveis de sensibilidade ao etileno, ‘Calypso’ é muito sensível e ‘MG 302’ mostrou sensibilidade intermediária. Independente da cultivar, o tratamento com STS bloqueou consideravelmente a ação do etileno em ambos os estádios de desenvolvimento e a utilização de 1-MCP foi menos eficiente