Emergência de sementes de girassol (Helianthus annuus) sob estresse salino irrigado por bombeamento fotovoltaico

Silva, Rita de Cássia Barbosa da; Santana, Geanderson Silva; Neto, Manuel Rangel Borges; Coelho, Francisco Jonatas Siqueira; Monteiro, Giovanne de Souza; Leite, Raiomara Lopes

doi:10.31416/rsdv.v5i2.129

Cited by 7 publications

(3 citation statements)

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“…As seen in Carthamus tinctorius L. seeds, saline stress caused late germination, which was equivalent to increasing treatment (Dantas et al, 2011). Also verified by other authors, the reduction in the germination speed with the increase in the concentration of NaCl, indicating that the seeds showed sensitivity, as was the case with sunflower seeds (SILVA et al, 2017; y Source: Author, 2020.…”

Section: Resultsmentioning

confidence: 61%

“…The decrease in the seed germination rate may be related to the resulting physiological drought (SILVA et al, 2017), as the excess of soluble salts in the substrate causes a decrease in water potential, resulting in a decrease in the capacity for water absorption by the seeds. This also causes the entry of ions, especially Na+ and Cl-, sufficient to cause toxicity to the embryo and/or endosperm membrane cells (DUTRA et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

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Hybrid and native sesame seeds subjected to salinity

Melo¹,

Berto²,

Melo³

et al. 2023

CLCS

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Sesame is a plant with great economic and social potential, being used for various purposes such as the food, pharmaceutical, medicinal industries, and more recently, as a source of renewable energy for the production of biofuel. One of the factors that most limit the productivity of this crop is salt stress. Based on this, the present work aimed to evaluate the germination and vigor of hybrid and creoles sesame seeds subjected to saline stress. The experiment was carried out at the Phytotechnics Laboratory of the Engineering and Agricultural Sciences Campus/UFAL. Two sesame cultivars were studied, BRS Anahí and Creole from the state of Sergipe. The seeds were aseptically treated by immersion in 70% alcohol for 1 minute, followed by washing in running water before being subjected to the treatments. To simulate salt stress, sodium chloride (NaCl) was used as a solute at concentrations of 0.0 (control); -0.1; -0.2; -0.3; -0.4 and -0.5 MPa. The material was placed, Biochemical Oxygen Demand (B.O.D.) germination type chamber, regulated at an alternate temperature of 20-30 °C. The experimental design used was completely randomized, with four replications of 25 seeds per treatments in a 2 x 6 factorial scheme (sesame cultivars x saline concentrations). Data were submitted to analysis of variance and polynomial regression, and the analyzes were performed using the SISVAR 5.6 software. The parameters evaluated were: water content, germination, first germination count, germination speed index, seedling length and dry mass. The results for the germination of sesame seeds submitted to salt stress showed that as the salinity levels increased there was a reduction in the percentage of germination of the sesame seeds studied, but until the concentration of -0.4 MPa they are within the standards allowed for commercialization of that culture. In the first count of germination, the Creoles sesame seeds showed the highest values, demonstrating better germination performance compared to BRS Anahí. In the germination speed index, BRS Anahí outperformed Creoles in all salt concentrations, except for the control. For seedling length, it was found that at the lowest salt concentrations both sesame varieties obtained the highest averages, with a significant reduction in length at the highest concentration (-0.5). The dry mass of the seedlings decreased as the water salinity increased, being more evident after the -0.3 MPa NaCl solution, especially for BRS Anahí. Thus, it can be concluded that salinity affects the physiological potential of sesame seeds, being more evident when at salt concentrations from -0.3 MPa. Creoles sesame seeds are less sensitive to saline stress.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Hybrid and native sesame seeds subjected to salinity

Melo¹,

Berto²,

Melo³

et al. 2023

CLCS

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“…Nessa etapa procedeu-se também a determinação da curva de embebição, que foi realizada com quatro repetições de 25 sementes, intactas e despontadas, sobre papel, colocadas em caixas do tipo Gerbox® em germinador do tipo B.O.D na temperatura de 30 ºC e pesadas nos tempos: 0,4,8,16,24,48,72,96,120,144, 168 e 192 horas, sendo a embebição medida através da determinação do aumento da massa, em gramas (ARAÚJO NETO et al, 2017).…”

Section: Desenvolvimento Pós-seminalunclassified

A CULTURA DO GIRASSOL (Helianthus annuus L.)

Araujo¹,

Santos²,

Silva³

et al. 2021

Tecnologias Aplicadas Em Análises De Sementes E Tópicos Sobre a Cultura Do Girassol

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Implementation and Evaluation of the First Renewable Energy Systems Technical Course in Brazil

2019

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Availability of skilled labor in renewable energies (REs) is a necessity for countries that, in search of sustainable development, intend to invest in this segment. Experiences with the training of this professional have been little reported in the literature, being more frequent studies contemplating superior level formation. In this paper, we describe the Brazilian experience with professional training of technicians in the RE sector. An overview of the public-professional education, the report, and the evaluation of the implementation of the first face-to-face technician course in RE systems in Brazil are presented. The course was offered in the Brazilian northeastern region, which stands out for the largest installed capacity in the country of solar and wind power plants (8223 MW); additionally, this region is characterized by social challenges, as a low Human Development Index (0.656), the lowest among the Brazilian regions. We also propose an updated teaching program with the indication of a reference curricular matrix. INDEX TERMS Curriculum development, educational institutions, educational programs, sustainable development vocational training. I. INTRODUCTION According to the International Renewable Energy Agency (IRENA), the world's RE sector employed 10.3 million people in 2017-an increase of 5.3% over 2016. China, Brazil, the United States, India, Japan and Germany represent more than 70% of such jobs [1]. Developing and mastering Renewable Energy (RE) technologies, in addition to meeting the countries' own demands, is also a business opportunity abroad in both the surplus energy trade and the export of technologies and services in a growing market, especially in developing countries. RE participation in the energy matrix of countries depends on a number of variables, such as political interest, availability of natural resources, financial resources and skilled labor. Vocational education at a technical level, especially in the RE field, is scarcely mentioned in the literature, and higher education is more frequent, although it is relevant for the training of managers and decision makers. However, in a natural distribution of jobs, the demand for craftsmen, The associate editor coordinating the review of this manuscript and approving it for publication was Hongli Dong.

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Emergência de sementes de girassol (Helianthus annuus) sob estresse salino irrigado por bombeamento fotovoltaico

Cited by 7 publications

References 7 publications

Hybrid and native sesame seeds subjected to salinity

Hybrid and native sesame seeds subjected to salinity

A CULTURA DO GIRASSOL (Helianthus annuus L.)

Implementation and Evaluation of the First Renewable Energy Systems Technical Course in Brazil

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