Qualidade fisiológica de sementes de beterraba (Beta vulgaris L.) sob condicionamento osmótico e tratamentos fungicidas

Dias, Maristela Aparecida; Aquino, Leonardo Ângelo de; Dias, D.C.F.S.; Alvarenga, Eveline Mantovani

doi:10.1590/s0101-31222009000200022

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Dias et al (2009) found that beet seeds exposed to osmotic conditioning in water for 16 h, followed by fungicide treatment (0.004% Metalaxyl) had the most positive influence in the germination test and on the establishment of seedlings in soil, among the treatments studied.…”

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confidence: 94%

Beet seed priming with growth regulators

Dotto

Silva

2017

SCA

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Seed priming is a technique used to induce metabolic germination processes. Use of growth regulators in seed priming may facilitate increments in physiological processes during seed germination. The objective of this study was to evaluate the effect of priming and growth regulators on beet seed germination. The treatments were cultivar type (Early Wonder, Itapuã and Maravilha) and seed priming technique, which included a control (unconditioned seed) standard hydropriming (water) and a conditioning with salicylic, gibberellic and ascorbic acids, respectively. The treatments were defined by initially testing 0, 1, 2 and 4 mM ascorbic, gibberellic and salicylic acids. Before seed priming, imbibition seed curves were established to determine the optimal conditioning time. After conditioning, the germination, rate of germination, seedling length and seedling dry weight were evaluated. First, the appropriate dosage for conditioning was determined by using a completely randomized experimental design, with four replications per cultivar. Then, a 3 x 5 (cultivar x conditioning technique) factorial design was adopted. Whenever the results were significant by variance analysis, regression analysis was performed. Finally, Tukey's test was used to compare the means at P=0.05. Beet seed priming alters the potential of germination and is influenced by the cultivar and conditioning technique. Pretreatment with 1−2 mM ascorbic, gibberellic or salicylic acids, respectively, promotes beet seed germination, whereas at 1−3 mM, the growth of roots and shoots of beet seedlings is promoted. The most effective techniques to promote germination and growth of sugar beet seedlings were priming with water, salicylic acid or gibberellic acid. Key words: Beta vulgaris. Hydropriming. Gibberellic acid. Salicylic acid. Ascorbic acid. ResumoO condicionamento fisiológico é uma técnica que permite a ativação dos processos metabólicos e fisiológicos na germinação das sementes por meio da utilização de reguladores de crescimento. Desta forma, objetivou-se avaliar o efeito do condicionamento fisiológico de sementes de beterraba com reguladores de crescimento. Foram utilizadas três cultivares: Early Wonder, Itapuã e Maravilha, submetidas a cinco tipos de condicionamentos: testemunha (semente não condicionada) hidrocondicionamento padrão (água), condicionamento com os ácidos salicílico, giberélico e ascórbico. Para definição dos tratamentos, foram testadas doses de 0; 1; 2 e 4 mMol.L -1 dos ácidos. Previamente ao condicionamento, foram realizadas as curvas de embebição das sementes, para determinação do tempo ideal de condicionamento, logo após, as sementes foram avaliadas quanto à porcentagem e velocidade de germinação, comprimento e massa seca de plântulas. O delineamento experimental utilizado foi inteiramente casualizado com quatro repetições, separado para cada cultivar, determinando-se as dosagens adequadas. Na segunda etapa foi adotado esquema fatorial 3 x 5 (cultivares x tipo de condicionamento). Os resultados foram submetidos a análise ...

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confidence: 94%

Beet seed priming with growth regulators

Dotto

Silva

2017

SCA

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“…Dias et al (2009) have affirmed that seed treatment with fungicide are recommendable for seeds submitted to priming, once such practice favor maintenance of the seed quality. There was no interaction between seedling emergence and seedling emergence speed index, and, so, both treatments were independent for these two parameters (Table 2).…”

Section: Resultsmentioning

confidence: 96%

Incidence of storage fungi and hydropriming on soybean seeds

Costa¹,

Bonassa²,

Novembre³

2013

J. Seed Sci.

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-Priming is a technique applicable to seeds of various plant species; however, for soybean seed there is little available information correlating such technique to the storage fungi. The objective of this study was to assess hydropriming on soybeans seeds and correlate this technique to occurrence of such fungi. For this, soon after acquisition the soybean seeds, cv. M-SOY 7908 RR, were characterized by: moisture content, mechanical damage, viability (seed germination and seedling emergence) and seed health. A completely randomized experimental design was used with treatments arranged into a factorial scheme 2 × 2 [2 levels of incidence of storage fungi (low and high) × 2 hydropriming (with and without) ]. After application of treatments, the seeds were analyzed by: moisture content, viability (seed germination and seedling emergence) and vigor (first count and accelerated aging). The hydropriming is beneficial to improve the quality of soybean seeds with low incidence of storage fungi, with increments on speed germination (first count) and seed germination after accelerated aging test. The high incidence of microorganisms can reduce the hydropriming benefits.Index terms: priming, Aspergillus spp., Penicillium spp., Glycine max.Incidência de fungos de armazenamento e hidrocondicionamento de sementes de soja RESUMO -O condicionamento fisiológico é uma técnica aplicável às sementes de várias espécies vegetais. No entanto, para as sementes de soja não há informação disponível, relacionando esta técnica com os fungos de armazenamento. Desta forma, o objetivo dessa pesquisa foi avaliar a interação entre o hidrocondicionamento de sementes de soja e a incidência desses fungos. Foram avaliadas sementes de soja, cultivar M-SOY 7908 RR, que, logo após a aquisição, foram caracterizadas quanto ao teor de água, dano mecânico, viabilidade (testes de germinação e emergência da plântula) e sanidade. O delineamento experimental utilizado foi o completamente ao acaso com tratamentos arranjados em esquema fatorial 2 × 2 (alta e baixa incidência de fungos × com e sem hidrocondicionamento). Após a aplicação dos tratamentos as sementes foram avaliadas quanto: ao teor de água, à viabilidade (germinação das sementes e emergência da plântula) e ao vigor (primeira contagem e envelhecimento acelerado). O hidrocondicionamento, quando aplicado em sementes de soja com incidência baixa de microrganismos de armazenamento, é benéfico para aprimorar a qualidade das sementes, com incremento da velocidade de germinação (primeira contagem) e da germinação após o teste de envelhecimento acelerado. No entanto, a incidência alta desses microrganismos prejudica os benefícios do hidrocondicionamento.Termos para indexação: condicionamento fisiológico, Aspergillus spp., Penicillium spp., Glycine max.

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“…The castor bean seeds naturally have a slow and uneven germination, which extends their expousure to soil pathogens and other environmental stresses, resulting in irregular stands. Therefore, the use of seeds with high germination rates and vigor guarantees producers success regarding proper stand establishment (Dias et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Inducing salt tolerance in castor bean through seed priming

Lopes¹,

Prisco²,

Gomes-Filho³

2018

Aust J Crop Sci

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Castor bean (Ricinus communis L.) cultivation requires production techniques appropriate for its growth conditions. Thus, the characterization of the deleterious effects of salinity on seed germination and on seedling establishment and the evaluation of the use of priming techniques on seeds could reduce replanting costs and improve emergence uniformity, preparing plant responses to salt stress. The goals of this current research were to characterize the deleterious effects of salinity on seed germination and on seedling establishment and to evaluate the use of the seed priming techniques as a tool to minimize these deleterious effect. In this research, castor bean seeds, cv. BRS-Energia was used to characterize effects of salt stress on germination and seedling establishment. Then, some chemicals such as PEG-6000 and H 2 O 2 were evaluated to find the beneficial priming techniques for castor bean seeds against salt stress. Our results indicate that water imbibition by the seed under salinity conditions decelerated the time of exposure to salinity. Salinity also affected the germination of castor bean seeds under an Ψs of -0.4 MPa and seedling growth was already affected under an Ψs of -0.16 MPa. Priming with CaCl 2 , NaNO 2 , NaNO 3 and PEG-6000 showed promising results under an Ψs of 0.0 MPa, but priming with NaNO 3 and PEG-6000 were ones that contributed most to better germination and establishment of seedlings under saline conditions. However, NaNO 3 is the most recommended priming agent for castor bean because accelerated seed germination, reducing the time to emergence and planting risks.

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Qualidade fisiológica de sementes de beterraba (Beta vulgaris L.) sob condicionamento osmótico e tratamentos fungicidas

Cited by 4 publications

References 12 publications

Beet seed priming with growth regulators

Beet seed priming with growth regulators

Incidence of storage fungi and hydropriming on soybean seeds

Inducing salt tolerance in castor bean through seed priming

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