A canola (Brassica napus L. var. oleifera) é uma das principais oleaginosas para fins comestíveis e industriais. Metodologias avaliar o potencial fisiológico de sementes canola, assegurando a comercialização lotes alta qualidade são necessárias. Nesse sentido, objetivo deste estudo foi adequar metodologia avaliação da fisiológica por meio do teste condutividade elétrica. Foram utilizadas provenientes três cultivares Hyola 575 CL, Nuola 300 Diamond que foram submetidas testes caracterização...

Abstract: Due to increased use of treated seeds, studies are necessary in relation the effects treatments and their possible consequences on seed quality. The aim this study was evaluate phytotoxicity according when phytosanitary products applied soybean seeds effect physiological quality field performance. A completely randomized experimental design used a 9 × 2 factorial arrangement involving (fungicides insecticides) two application times (60 days before sowing at time field). Moisture...

Abstract: The objective of this paper was to evaluate the effect nitric oxide (NO) as a protecting agent sesame seeds submitted different concentrations cadmium. treatments were: water (control), increased by sodium nitroprusside (SNP) and other regarding cadmium SNP. following determinations were done: germination, first count germination speed index, length hypocotyl radicle dry matter radicle, besides quantification enzyme activities, superoxide dismutase, catalase, ascorbate peroxidase...

ABSTRACT The use of an appropriate method that accurately expresses physiological seed quality and minimizes possible phytotoxicity by chemical products in laboratory testing with soybean seeds is relevant. objective this work was to evaluate the influence infer adequacy for representative evaluation treated phytosanitary products. Two experiments were carried out a completely randomized design, trial 1 9×5 factorial scheme involving nine treatments, including fungicides insecticides,...

Abstract: The size of soybean seeds needs further study because its relationships with physiological quality, field establishment, and yield are controversial. aim this was to evaluate the effects seed on establishment quality. In field, a 2x3x3 factorial design used, two cultivars (M 5947 IPRO 59HO124 IPRO), three sizes (5.5, 6.0, 6.5 mm), sowing densities (280,000, 320,000, 360,000 plants.ha-1). Agronomic traits grain were evaluated. After harvest, only from plots population 320,000 plants...

Studies that evaluate the physiological and biochemical mechanisms of germination within forest species are needed in order to improve our understanding such processes. Mercury dithiothreitol indicated as important tools studies assess activity aquaporins during imbibition seeds. To investigate alterations caused by mercury inPlathymenia reticulata seedsdifferent doses were used presence absence dithiothreitol. had a dose-dependent effect on seeds; most dilute solutions partially inhibited...

Abstract: Germination does not guarantee plant establishment if there is no efficient and enough reserve mobilization from seeds to the initial seedling growth, mainly in adverse situations. Therefore, this study aimed evaluate of reserves soybean under water restriction. Four seed lots previously stored for one year were used study. To simulate stress, we polyethylene glycol (PEG) solutions at concentrations 0.0, -0.1, -0.2 MPa. The number normal, infected abnormal seedlings evaluated,...

Abstract: Productive soybean genotypes is one of the main objectives breeding programs. However, there are few studies on selection characteristics associated with quality and performance seeds. The objective in this study was to predict physiological genetic parameters seed segregating populations derived from parents differing maturity groups. Eight F2:3 population (numbered 163, 24, 57, 108, 164, 169, 157, 81) cultivated 2018/19 harvest were evaluated. To conduct experiment, a completely...

Abstract: Recent studies indicate that global temperatures will rise substantially in the 21st century, leading to extinction of several plant species, as metabolism and germination are greatly affected by temperature. Melanoxylon brauna, a tree species native Atlantic Forest occurs from northeastern southeastern Brazil, is one many threatened warming. Despite economic ecological importance M. investigating influence heat stress on seed biochemical responses still incipient. This study aimed...

The use of tetrazolium test is important in the evaluation seeds lot quality and it has been adopted for vigor viability identification several species.The interest on production oil radish increasing since were considered a good source biofuel production.The development methodology this species can improve seed control process, additionally will provide information characterization remaining (dead or dormant) germination tests.To verify ideal conditions to was conducted two experiments.At...

Abstract: The objective in this work was to investigate the effect of nitric oxide (NO) like protective agent sesame seeds submitted different osmotic potentials. treatments, total eight, were water (control), plus sodium nitroprusside (SNP) and other treatments with PEG 6000 SNP: - 0.1 MPa, -0.1MPa +200 µM SNP, 0.2 -0.2 MPa -0.3 SNP. Were done following determinations: germination, first count speed germination index, hypocotyl length, radicle dry mass radicle. It quantified activity...

Sampling is an essential step in estimating a parameter: thus, cost and time associated to this should be minimized. Sequential sampling characterized by using samples of variable sizes given as function observations, sequential provides smaller sample size than fixed-size most cases. In addition, the Bayesian decision theory can incorporated into perform parameter estimation because it allows inclusion priori information about interest, which optimizes procedure. However, great challenge...

O teste de deterioração controlada tem sido muito utilizado na diferenciação sementes quanto ao nível vigor em diversas espécies. Entretanto, as condições para realização desse são incipientes, sobretudo, quando se trata espécies forrageiras tropicais. Assim, objetivou-se adequar a metodologia do avaliação da qualidade fisiológica B. brizantha comercializadas. Foram utilizados quatro lotes comerciais cada cultivar cv. Marandú e Piatã, sendo que perfil dos lotes, foram analisados os seguintes...

The recommended method to overcome seed coat dormancy in sweet potato seeds is exposure sulfuric acid, which can damage the embryo and affect seedling development depending on time. This study aimed determine ideal immersion period using physiological, anatomical, enzymatic analyses. Seeds were scarified with concentrated acid for nine periods. Physiological analyses included germination tests, speed index, first count, emergence test, index. Image analysis quantified primary root length,...

A composição química de sementes é um fator genético que sofre influência diversos fatores ambientais. Além dos ambientais, a inserção genes através transgenia pode causar modificações na das e torná-las mais atrativas ao ataque insetos. Objetivou-se avaliar as causadas pelas tecnologias RR IPRO química, atratividade à insetos, produção qualidade soja. Utilizou-se o delineamento experimental blocos casualizados com 3 repetições para cada uma 14 cultivares compuseram os tratamentos, sendo 7...

Plant production is essential for the maintenance of human activity on Earth, and as seeds are main tool plant propagation, obtaining high-quality successful planting. Forest species applied in diff erent areas, such timber, pharmaceutical industry, landscaping projects, degraded area recovery. The search seedlings forest has increased due to intense exploitation ecosystems need recover areas. Therefore, it necessary use that composed a complex set attributes, including genetic, physical,...

Abstract: For the germination of sweet potato (Ipomoea batatas) seeds to occur, it is necessary overcome dormancy, which makes difficult assess their physiological potential. The aim this research was define a methodology dormancy and use image analysis determine physical quality. Four genotypes were used, namely UFVJM-5, UFVJM-22, UFVJM-38 UFVJM-65. To chemical scarification with 98% H2SO4 for 10 20 minutes, hot water at 95 °C mechanical electric grinder tested. evaluate quality, analyzed...

Estudos na área de biologia molecular têm evoluído rapidamente e novas técnicas, a exemplo da RT-qPCR, têm-se mostrado úteis quantificação padrões expressão gênica relacionados à qualidade sementes. No entanto, utilização dessas técnicas depende diretamente obtenção um RNA boa em quantidadesadequadas. Nesse trabalho foram testados quatro métodos extração (Método CTAB,Borato quente, Pure Link Reagent Trizol Reagent), diferentes estádios desenvolvimento sementes pimenta habanero (Capsicum...