&lt;b&gt;Data transformation: an underestimated tool by inappropriate use

Ribeiro‐Oliveira, João Paulo; Santana, Denise Garcia de; Pereira, Vanderley José; Santos, Carlos Eduardo Magalhães dos

doi:10.4025/actasciagron.v40i1.35300

Cited by 19 publications

(9 citation statements)

References 42 publications

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“…For the classical physiological measurements recorded from CRD, we tested the data for the assumptions (α = 0.01) of normality of residuals (Kolmogorov-Smirnov test) and homogeneity of variances (Levene test), and, when the assumptions were violated, we performed data transformation according to [36] (S3 Table). For cumulative germination curves, we chose regression models based on significance from ANOVA test and model fitting to observed data.…”

Section: Discussionmentioning

confidence: 99%

What happens when the rain is back? A hypothetical model on how germination and post-germination occur in a species from transient seed banks

et al. 2020

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We hypothesize that by simulating the natural priming in seeds of a species that forms transient seed banks it is possible to clarify molecular aspects of germination that lead to the recruitment of seedlings when the next rainy season begins. We used seeds of Solanum lycocarpum as a biological model. Our findings support the idea that the increment of seed germination kinetics when the rainy season returns is mainly based on the metabolism and embryonic growth, and that the hydropriming, at the end of seed dispersion, increases the germination window time of these seeds by mainly increasing the degradation of galactomannan of the cell wall. This can improve the energy supply (based on carbon metabolism) for seedling growth in post-germination, which improves the seedling's survival chances. From these findings, we promote a hypothetical model about how the priming at the end of the rainy season acts on mRNA synthesis in the germination of seeds from transient banks and the consequence of this priming at the beginning of the following rainy season. This model predicts that besides the Gibberellin and Abscisic Acid balance (content and sensitivity), Auxin would be a key component for the seed-seedling transition in Neotropical areas.Seed collection was performed under authorization number SISGEN AB0EB45. OPEN ACCESS Citation: Souza BLd, Ribeiro-Oliveira JP, Bravo JP, Dias GF, Silva EAAd (2020) What happens when the rain is back? A hypothetical model on how germination and post-germination occur in a species from transient seed banks. PLoS ONE 15 (2): e0229215. https://doi.org/10.(Finance code 001) to J.P. Ribeiro-Oliveira and Conselho Nacional de Desenvolvimento Científico e Tecnológico 309718/ 2018-0 to E. A. Amaral da Silva.themselves in an area [3][4][5][6]. Thus, when we understand how the soil seed bank works, we do not only outline strategies for in situ conservationism of species, but also ex situ (germplasm banks). In this context, several reports have brought light to the functionality of these banks, relying mainly on longevity and the germination-dormancy balance of seeds [e.g., 7 and their references]. However, we still know little about what affects this germination-dormancy balance from a molecular point of view. A strategy to fill this gap is to cross classic physiological measurements of the germination ecophysiology with key components of the gene expression involved in embryo growth [8].A limiting factor to perform a crosstalk between gene expression and germination ecophysiology would be that laboratory protocols are not very representative of what happens in the field from an ecological point of view. However, this barrier is being overcome by the idea that detailed laboratory protocols for sampling communities and performing germination experiments can produce significant characters that are as enlightening as those obtained in field experiments. Therefore, if we have these protocols, we will be able advance the understanding of functional plant traits [see 9]. For example, the interruption of...

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Section: Discussionmentioning

confidence: 99%

What happens when the rain is back? A hypothetical model on how germination and post-germination occur in a species from transient seed banks

et al. 2020

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“…Relevance of Data Transformation Techniques … 86 assumptions are not met (Ribeiro-Oliveira et al 2018). A classic instance of improper employment of data transformation is the attempt to decrease the coefficient of variation (Souza et al 2008).…”

Section: Angular Transformationmentioning

confidence: 99%

“…On the contrary, non-parametric models can be extensively used to avoid the assumptions needed for parametric ANOVA. Ribeiro- Oliveira et al (2018) mentioned that non-parametric methods are applicable, especially when there are no residuals adjusting to the Gaussian distribution (Judice et al 1999). This seems to be quite conflicting because normal approximation for large samples is considered as a basis of the nonparametric statistics (Zar, 1999).…”

Section: Angular Transformationmentioning

confidence: 99%

“…However, from a practical point of view, the problem is that scientists face difficulty in interpretation and discussion of results on scales other than the original (Ribeiro- Oliveira et al 2018). Even after having its criticism, data transformation remains as a very commonly used technique because though it is not proper for every data set (Quinn and Keough, 2002;Jaeger, Relevance of Data Transformation Techniques … 82 2008;O'Hara and Kotze, 2010), the reasons for transforming data are much more than not to use it all (Bartlett, 1947;Keene, 1995;Ahmad et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Pandit

2020

J. Res. Weed Sci.

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In the field of weed science, data transformation techniques are of frequent use while evaluating investigating weed count data. Even after having its criticism, data transformation still remains as a very popular technique because the reasons for its use are quite greater than its non-use. Depending on the functional relationship existing between mean and variance of the weed count data, suitable transformations like logarithmic, square root and angular, should be used.

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“…O processo germinativo das sementes foi estudado usando um modelo hierárquico As pressuposições do modelo foram verificadas pelo teste de Kolmogorov-Smirnov, para determinar a distribuição normal dos resíduos, e pelo teste de Levene, para homocedasticidade, ambos a 0,01 de significância. Toda vez que a transformação de dados não levou à ajustes da pressuposição, mas melhorou a probabilidade dos testes, optou-se pela estatística paramétrica (RIBEIRO-OLIVEIRA et al 2018). A comparação da significância do modelo se deu via teste F de Snedecor, e as comparações múltiplas das médias foram viabilizadas pelo teste de Tukey, ambos 0,05 de significância.…”

Section: Modelo Hierárquico Ou Análise De Nestedunclassified

Germinação de sementes e respostas fotossintéticas de Miconia albicans (Sw.) Triana (Melastomataceae) e sua capacidade de estabelecimento em veredas alteradas

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A minha mãe Luciani, por todo apoio e todo encorajamento que me deu neste período de aprendizado, sem este suporte nada seria possível.Aos meus avós Wanderley e Onofra, pelos valores, carinho, afeto e amor que me transmitem em cada abraço e em cada sorriso.Ao meu pai Adenilson, que mesmo não estando fisicamente presente para comemorar, está nas lembranças e no coração.Aos meus amigos, que vivenciaram comigo todos os momentos e me deram uma palavra amiga para sempre seguir.Ao meu parceiro e amigo Vanderley, por partilhar momentos e conhecimentos.A minha orientadora Profª Dra. Ana Paula de Oliveira, pela calma, pela fala amiga e pelo conhecimento transmitido ao longo destes dois anos.Ao meu coorientador Prof Dr. João Paulo Ribeiro de Oliveira, pelos momentos de diálogo, carregados de aprendizado e sabedoria. A Profª Dra. Maria Cristina Sanches, por ter me instruído sempre que precisei e, por aceitar participar da banca examinadora deste trabalho. A Profª Dra. Isa Lucia de Morais, por aceitar participar da banca examinadora deste trabalho. Ao PPGBV, por ter me proporcionado a possibilidade de ampliar meus conhecimentos. O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Código de Financiamento 001 Gratidão a vocês! SUMÁRIO

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<b>Data transformation: an underestimated tool by inappropriate use

Cited by 19 publications

References 42 publications

What happens when the rain is back? A hypothetical model on how germination and post-germination occur in a species from transient seed banks

What happens when the rain is back? A hypothetical model on how germination and post-germination occur in a species from transient seed banks

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Germinação de sementes e respostas fotossintéticas de Miconia albicans (Sw.) Triana (Melastomataceae) e sua capacidade de estabelecimento em veredas alteradas

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