Aspectos taxonômicos e morfológicos do processo germinativo e da plântula de Peltogyne venosa subsp. densiflora (Spruce ex Benth.) M.F. Silva (Leguminosae – Caesalpinioideae)

Silva, Maria Maricélia Felix da; Bastos, Maria de Nazaré do Carmo; Gurgel, Ely Simone Cajueiro

doi:10.46357/bcnaturais.v4i3.652

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Where a change in behavior or interference in a system has the ability to disturb the dynamics of another system. In view of this, the contagion effect is understood as the transmission of the effects of a financial/economic disruption (crash or volatility) from one sector, region, or market to another [8][9][10][11]. The interdependence between markets is a well-regarded feature in times of stability but not so attractive in times of crisis, given the possibility of risk transmission (the contagion effect) and market failure [3,[5][6][7]9,11].…”

Section: Introductionmentioning

confidence: 99%

Interdependence and Contagion of Effect in the Agricultural Commodities Market: A Bibliometric Analysis

Santana¹,

Horta²,

Ramos³

et al. 2023

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The purpose of this article is to conduct a bibliometric review of literary production in terms of market interdependence. We investigate the effect of contagion on agricultural commodities and identify the commodities and methods used in the most cited publications over the decades. For this, we used the SCOPUS database, sorting with Rayyan, Excel, and finally, the Bibliometrix/R-project. The results showed that corn, wheat, soybeans, cotton, and sugar are the most studied commodities. There is no uniqueness concerning the methods used to identify interdependence and the contagion effect. Also, it is possible to perceive the growing scientific interest concerning the subject, with a diversity of authors and magazines. However, there is a direction of the and magazines most cited articles for analyzing agricultural commodities and energy, demonstrated a worldwide trend of studies relating natural resources, biofuels, clean energy, and efficiency. In addition, countries like China and the United States stand out in this scientific scenario as the countries that produce the most articles.

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Section: Introductionmentioning

confidence: 99%

Interdependence and Contagion of Effect in the Agricultural Commodities Market: A Bibliometric Analysis

Santana¹,

Horta²,

Ramos³

et al. 2023

Preprint

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Morphological aspects of fruits, seeds, and seedlings, and anatomy of seedlings of apuleia molaris spruce ex benth

et al. 2016

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-Apuleia molaris spruce ex benth, commonly known in Brazil as "amarelão," is a fast-growing forest plant with a potential for use in reforestation; however, there is little information about the physiology and morphology of its fruits, seeds, and seedlings. Thus, the objective of this work was to describe the morphology of the fruits, seeds, and seedlings, in addition to the anatomic patterns of seedlings, as a contribution to the technical-scientific knowledge and production of amazonian species for reforestation in the state of Pará. For this purpose, the morphological descriptions followed the parameters from specialized literature and the common techniques used in plant anatomy. The species presents leguminous fruit; seeds with pleurogram, average dimensions of 51.21, 21.33, and 2.09 mm length, width, and thickness, respectively; and seedlings with eophyll and pinnate metaphylls, cordiform, phanerocotylar germination, epigaeous, and foliaceous. Eophylls and metaphylls present uniseriate epidermis, collateral and dorsiventral vascular bundle. The morphological characteristics may help in field identification and in the identification of young plants, aiding the production of seedlings of this species. Furthermore, anatomically, the hypocotyl has no striking differences from the root.Index terms: taxonomic identification, seedling production, seed technology.Aspectos morfológicos de frutos, sementes e morfo-anatômico de plântulas de apuleia molaris spruce ex benth.RESUMO -O amarelão (Apuleia molaris Spruce ex Benth.) é uma essência florestal de rápido crescimento, com potencial para o reflorestamento, entretanto existem poucas informações a respeito da tecnologia e morfologia dos frutos, sementes e plântulas. Com isso, o objetivo do presente trabalho foi descrever a morfologia de frutos, sementes e plântulas, além dos padrões anatômicos das plântulas, como contribuição para o conhecimento técnico-científico e produção de espécies amazônicas para o reflorestamento no Estado do Pará. Para isso, as descrições morfológicas seguiram os parâmetros de literatura especializada e as informações anatômicas técnicas usuais em anatomia vegetal. A espécie apresenta frutos do tipo legume, semente com pleurograma, as sementes possuem dimensões médias de 51,21; 21,33; 2,09 mm para comprimento, largura e espessura respectivamente, e as plântulas com eofilos e metafilos imparipenados, cordiforme, germinação fânero cotiledonar, epigea, foliácea. Os eofilos e metafilos apresentam epiderme unisseriada, feixe vascular colateral e dorsiventral. As características morfológicas podem auxiliar na identificação em campo, e na identificação de plantas jovens, auxiliando a produção de mudas da referida espécie, anatomicamente o hipocótilo não apresenta diferenças marcantes da raiz.Termos para indexação: identificação taxonômica, produção de mudas, tecnologia de sementes.

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Coefficient of variation of normal seedlings obtained from the validation of methods for the seed germination testing of 20 species belonging to the family Fabaceae

Pereira

Santana

2013

J. Seed Sci.

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The standardization of inter-laboratory results of germination test of forest species seeds requires that the methods be robust. Therefore, the objective was to compare and discuss, through the coefficient of variation for normal seedlings, the variabilities present in the process of validation methods obtained in the germination test for seeds of 20 species of the family Fabaceae. Coefficients of variation for the experiment by lot and by laboratory were calculated for normal seedlings from the statistical analysis of method validations. For normal seedlings of 20 Brazilian forest species, the coefficients of variation are low (up to 9.84%), to average (up to 17.66%), contrary to expectations due to high genetic variability in these barely improved species. The increase of the coefficient is not related to treatment for breaking dormancy, but it grows as the lot quality decreases. The high coefficients by laboratory, overestimated by the lot effect, are uniform indicating that the methods are repeatable. The coefficient is not an indicator capable of predicting the heterogeneity of model variance. As normal distribution models random events, randomness is present in the validation process of the 20 forest species of the Fabaceae family.Index terms: dormancy, statistical assumptions, forest seeds, data transformation, experimental variability.Coeficientes de variação de plântulas normais obtidas na validação de métodos para teste de germinação de sementes de 20 espécies florestais da família Fabaceae RESUMO -A uniformização dos resultados inter laboratoriais de testes de germinação de sementes de espécies florestais exige que os métodos sejam robustos. Assim, o objetivo foi comparar e discutir, por meio do coeficiente de variação obtido para plântulas normais, as variabilidades presentes no processo de validação de métodos obtidas no teste de germinação de sementes de 20 espécies da família Fabaceae. Coeficientes de variação para o experimento, por lote e por laboratório para a variável plântulas normais foram calculados. Os coeficientes de variação obtidos para plântulas normais de 20 espécies florestais nativas, são de baixos (até 9,84%) a médios (até 17,66%), contrariando o esperado pela grande variabilidade genética dessas espécies pouco melhoradas. O aumento do coeficiente de variação não está relacionado ao tratamento utilizado para superação de dormência, porém cresce à medida que a qualidade do lote decresce. Os altos coeficientes obtidos por laboratório, superestimados pelo efeito de lotes, são uniformes indicando que os métodos são reproduzíveis. O coeficiente de variação não é um indício capaz de predizer a heterogeneidade das variâncias do modelo. Como a distribuição normal modela eventos aleatórios, a aleatoriedade está presente no processo de validação de métodos das 20 espécies florestais da família Fabaceae.Termos para indexação: dormência, pressuposições estatísticas, sementes florestais, transformação de dados, variabilidade experimental.

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Aspectos taxonômicos e morfológicos do processo germinativo e da plântula de Peltogyne venosa subsp. densiflora (Spruce ex Benth.) M.F. Silva (Leguminosae – Caesalpinioideae)

Cited by 4 publications

References 10 publications

Interdependence and Contagion of Effect in the Agricultural Commodities Market: A Bibliometric Analysis

Interdependence and Contagion of Effect in the Agricultural Commodities Market: A Bibliometric Analysis

Morphological aspects of fruits, seeds, and seedlings, and anatomy of seedlings of apuleia molaris spruce ex benth

Coefficient of variation of normal seedlings obtained from the validation of methods for the seed germination testing of 20 species belonging to the family Fabaceae

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