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Macular dystrophies associated with Stargardt-like phenotypes Stargardtlike Stargardt like
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Amaral, Rebeca A. S.

; Zin, Olivia A.

; Salles, Mariana V.

; Motta, Fabiana L.

; Sallum, Juliana Maria Ferraz

Arquivos Brasileiros de Oftalmologia

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2024, Volume 87 N. 4 elocation e2021-0415

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivo: Fenótipos Stargardt-like já foram asso-ciados a variantes patogênicas no gene ABCA4. O propósito desse estudo é descrever quatro pacientes com achados retinianos semelhantes a doença de Stargardt com resultados moleculares diferentes do esperado. Métodos: Esse relato fez a revisão de prontuários médicos de quatro pacientes com distrofia macular e achados clínicos sugestivos de doença de Stargardt. Foram realizados avaliação oftalmológica, exames de imagens e testes usando next generation sequencing para avaliar variantes patogênicas associadas aos fenótipos dos pacientes. Resultados: Os pacientes apresentavam atrofia macular e alterações pigmentares sugerindo achados clínicos de doença de Stargardt. Dois pacientes foram associados a genes com herança autossômica dominante (RIMS1 e CRX) e dois pacientes foram associados a genes com herança autossômica recessiva (CRB1 e RDH12) com variantes preditoras de serem patogênicas. Conclusão: Distrofias maculares podem ter similaridades fenotípicas com fenótipo de Stargardt-like associados a outros genes além dos classicamente já descritos. Objetivo Stargardtlike like asso ciados ABCA4 ABCA esperado Métodos oftalmológica Resultados RIMS1 RIMS (RIMS CRX CRB1 CRB (CRB RDH12 RDH Conclusão descritos RDH1

ABSTRACT Purpose: Stargardt-like phenotype has been described as associated with pathogenic variants besides the ABCA4 gene. This study aimed to describe four cases with retinal appearance of Stargardt disease phenotypes and unexpected molecular findings. Methods: This report reviewed medical records of four patients with macular dystrophy and clinical features of Stargardt disease. Ophthalmic examination, fundus imaging, and next-generation sequencing were performed to evaluate pathogenic variants related to the phenotypes. Results: Patients presented macular atrophy and pigmentary changes suggesting Stargardt disease. The phenotypes of the two patients were associated with autosomal dominant inheritance pattern genes (RIMS1 and CRX) and in the other two patients were associated with recessive dominant inheritance pattern genes (CRB1 and RDH12) with variants predicted to be pathogenic. Conclusion: Macular dystrophies may have phenotypic similarities to Stargardt-like phenotype associated with other genes besides the classic ones. Purpose Stargardtlike like ABCA gene findings Methods examination imaging nextgeneration next generation Results RIMS1 RIMS (RIMS CRX CRB1 CRB (CRB RDH12 RDH Conclusion ones RDH1

https://doi.org/10.5935/0004-2749.2021-0415

Climate control in the feeding area for Girolando cows: Effects on environmental and production variables
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Sousa, Lainny J. M. P. e

; Passini, Roberta

; Almeida, Eduardo A. de

; Amaral, Alliny das G.

Revista Brasileira de Engenharia Agrícola e Ambiental

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dec 2023, Volume 27 N. 12 Pages 973 - 979

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT High-production cows require facilities providing comfortable environments to enhance production efficiency and sustain milk quality. This study evaluated the impact of climatizing the feeding area post-morning and afternoon milking on environmental variables, thermal comfort indices, and the yield and quality of milk in lactating Girolando cows. The experiment followed a 4 × 4 Latin square design with four treatments across four experimental periods, using four cows per treatment. The post-milking climate control treatments included: shading; shading + ventilation; shading + ventilation + shower; and an evaporative adiabatic cooling system. The evaporative adiabatic cooling system proved most effective in maintaining thermal conditions near the comfort level for dairy cows, as indicated by lower thermal comfort indices. This system also enhanced morning and overall milk production. However, the climate control systems did not significantly affect the contents of protein, fat, or lactose in the milk.

RESUMO As vacas de alta produção necessitam de instalações que ofereçam ambientes amenos, para que ocorra aumento da sua eficiência produtiva e manutenção da qualidade do leite. Dessa forma, esse trabalho objetivou avaliar a influência da climatização da área de alimentação após o período das ordenhas matutina e vespertina sobre as variáveis ambientais, índices de conforto térmico, produtividade e qualidade do leite de vacas girolando em lactação. Foi utilizado o delineamento em quadrado latino 4 × 4, com quatro tratamentos e quatro períodos experimentais, com quatro animais por tratamento, totalizando 16 repetições. Os tratamentos foram os sistemas de climatização na pós-ordenha: sombreamento; sombreamento + ventilação; sombreamento+ ventilação+ ducha e sistema de resfriamento adiabático evaporativo. O sistema de resfriamento adiabático evaporativo aumenta a produção leiteira na ordenha da manhã e na produção total. Os teores de proteína, gordura e lactose não foram influenciados pelos sistemas de climatização estudados.

https://doi.org/10.1590/1807-1929/agriambi.v27n12p973-979

Synthesis and Phytotoxic Evaluation of 3-Indolylglycine Derivatives as New Natural-Like Herbicides
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Amaral, Alexandra A.

; Willig, Julia C. M.

; Olguin, Conceição F. A.

; Oliveira, Isadora M.

; Stefani, Helio A.

; Botteselle, Giancarlo V.

; Manarin, Flávia

Journal of the Brazilian Chemical Society

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oct 2023, Volume 34 N. 10 Pages 1464 - 1473

Abstract: En | Text: En | PDF: En

A novel class of potential herbicides, 3-indolylglycines, was synthesized using an effective, green and rapid approach via multicomponent reaction (aza-Friedel-Crafts) between indoles, aldehydes and anilines in a water/sodium dodecyl sulfate system. The main advantages of this methodology are ease of handling, scalable to gram scale and a metal-free approach. The reaction is compatible with a variety of functional groups, obtaining the desired products in moderate to excellent yields. The biological activity of the 3-indolylglycines was evaluated, and it was found that these compounds interfere with the germination and radicle growth of Lactuca sativa, mainly the compound 4k.

https://doi.org/10.21577/0103-5053.20230058

Water-in-Oil Pickering Emulsions Stabilized by Divalent Metal Phenylphosphonate Particles
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Machado, Vitor V. S.

; Amaral, Lilian Fernanda M. do

; Sotiles, Anne Raquel

; Freitas, Rilton A. de

; Wypych, Fernando

Journal of the Brazilian Chemical Society

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jul 2023, Volume 34 N. 7 Pages 918 - 926

Abstract: En | Text: En | PDF: En

Phenylphosphonates of zinc (Zn-PPh), calcium (Ca-PPh) and magnesium (Mg-PPh) were synthesized by the hydrothermal method. Samples showed characteristic X-ray diffraction (XRD) patterns of layered compounds with basal spacing in the range of 14-15 Å. According to Fourier transform infrared spectroscopy (FTIR), all compositions showed the presence of characteristic bands attributed to phenyl aromatic rings, phosphonate and lattice metal-oxygen (M-O) vibrations. Different concentrations of phenylphosphonate particles were applied to stabilize water-in-oil Pickering emulsions using vaseline oil in different w/o fractions. The three particle types showed greater affinity for the oil phase (wettability) and the ability to stabilize the emulsions via the Pickering effect. Ca-PPh particles contained a greater emulsified fraction after 20 days of evaluation. This result can be attributed to the particle morphology observed by scanning electron microscopy (SEM). The fibrous morphology of Ca-PPh particles is believed to increase the steric hindrance effect at the surface around the droplets, while the Zn-PPh and Mg-PPh layered particles tended to form clusters.

https://doi.org/10.21577/0103-5053.20230002

Influence of structural and surface properties of Nb2O5 pellets on methylene blue adsorption and adsorbent reuse capacity
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Santos, A. L. dos

; Amaral, Á. L. S. do

; Souza, C. R. S.

; Batista, D. C.

; Paris, E. C.

; Figueiredo, A. T. de

; Giraldi, T. R.

Cerâmica

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apr 2023, Volume 69 N. 390 Pages 133 - 140

Abstract: En | Text: En | PDF: En

Abstract This study aimed to describe the preparation of Nb2O5 pellets by uniaxial pressing, to investigate the influence of heat treatment at different temperatures (800, 900, and 1000 °C) on the physical, surface, microstructural, and adsorptive properties of the materials, and to assess their potential as reusable adsorbents for methylene blue removal. Specimens treated at 800 °C contained a mixture of monoclinic and hexagonal phases, with a predominance of monoclinic structures. By contrast, heat treatment at 900 °C and above resulted in complete conversion to the monoclinic phase. The surface of Nb2O5 particles contained basic groups, possibly oxygen ions (O-). Experimental investigations showed that methylene blue adsorption followed second-order kinetics, suggesting chemical diffusion as the dominant process. Maximum adsorption occurred at pH 6.0. Pellets remained intact after the adsorption test. A study was carried out to determine the reusability of pellets over five adsorption cycles in methylene blue solutions at different concentrations. The maximum adsorbed concentration was 10.4 mg.L-1. The adsorption capacity of Nb2O5 specimens gradually decreased from 56% in the first cycle to 25% in the fifth cycle. Despite this reduction in removal efficiency, Nb2O5 pellets showed promise as reusable adsorbents in heterogeneous processes because of their high potential adsorption capacity and easy separation from the reaction medium.

https://doi.org/10.1590/0366-69132023693903426

Mansoa alliacea extract improves the growth performance and innate immune response of Arapaima gigas challenged with Aeromonas hydrophila and handling stress
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DIAS, Marcia Kelly Reis

; YOSHIOKA, Eliane Tie Oba

; RODRIGUEZ, Anselmo Fortunato Ruiz

; RIBEIRO, Ricardo Amaral

; FERNANDES, Caio Pinho

; OZÓRIO, Rodrigo Otávio Almeida

; TAVARES-DIAS, Marcos

Acta Amazonica

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mar 2023, Volume 53 N. 1 Pages 24 - 31

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT This study investigated the effects of dietary supplementation with Mansoa alliacea hydroalcoholic extracts on growth, blood and immune parameters of Arapaima gigas. Fish were fed for 30 days with diets enriched with 0, 4, 8, and 12 g kg-1 of M. alliacea hydroalcoholic extract and subjected to infection with Aeromonas hydrophila and handling stress. Fish fed with 8 g kg-1 of extract showed significant increase in final weight, specific growth rate and feed efficiency when compared to the other groups. Glucose, triglycerides, total proteins, and globulins increased significantly in fish fed with 8 g kg-1 of extract, whereas albumin decreased. The number of thrombocytes increased significantly with the dietary supplementation of 8 and 12 g kg-1 of extract. After the challenge with A. hydrophila and handling stress, fish fed with 8 g kg-1 of extract had significantly higher levels of glucose, globulins, and albumins, and fish fed with 8 and 12 g kg-1 of extract showed an increment of respiratory burst. Triglyceride levels dropped significantly in fish fed with 4, 8, and 12 g kg-1 of extract, whereas the number of neutrophils increased, and total thrombocytes, leukocytes and lymphocytes were higher in fish fed with 12 g kg-1 of extract. Dietary supplementation with M. alliacea extract at 8 g kg-1 was efficient in improving the growth and innate immunity of A. gigas, being potentially useful in fish farming to control the development of A. hydrophila infections.

RESUMO Investigou-se os efeitos da suplementação com extrato hidroalcólico de Mansoa alliacea sobre o crescimento e parâmetros sanguíneos e imunológicos de Arapaima gigas. Os peixes foram alimentados por 30 dias com dietas enriquecidas com 0, 4, 8 e 12 g kg-1 de extrato hidroalcoólico de M. alliacea e submetidos à infecção por Aeromonas hydrophila e estresse de manejo. Os peixes alimentados com 8 g kg-1 de extrato apresentaram aumento significativo no peso final, taxa de crescimento específico e eficiência alimentar quando comparados aos demais grupos. Glicose, triglicerídeos, proteínas totais e globulinas aumentaram significativamente nos peixes alimentados com 8 g kg-1 de extrato, enquanto a albumina diminuiu. O número de trombócitos aumentou significativamente com a suplementação dietética de 8 e 12 g kg-1 de extrato. Após infecção com A. hydrophila e estresse de manejo, os peixes alimentados com 8 g kg-1 de extrato apresentaram níveis significativamente mais altos de glicose, globulinas e albuminas, e os peixes alimentados com 8 e 12 g kg-1 de extrato apresentaram incremento de explosão respiratória. Os níveis de triglicerídeos decresceram nos peixes alimentados com 4, 8 e 12 g kg-1 de extrato, enquanto o número de neutrófilos aumentou, e o número total de trombócitos, leucócitos e linfócitos foi maior nos peixes alimentados com 12 g kg-1 de extrato. A suplementação com a 8 g kg-1 de extrato de M. alliacea foi eficiente em melhorar o crescimento e a imunidade inata de A. gigas, sendo potencialmente útil na piscicultura para controlar o desenvolvimento de infecções por A. hydrophila.

https://doi.org/10.1590/1809-4392202101231

Are Previous Joint Injuries Associated with Muscle Performance in Volleyball Athletes?
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Bittencourt, Natália F. N.

; Amaral, Giovanna M.

; Zuin, Alysson L.

; Mascarenhas, Rodrigo de O.

; Silva, Anderson A.

; Silva, Hytalo de J.

; Mendonça, Luciana D.

Revista Brasileira de Ortopedia

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feb 2023, Volume 58 N. 1 Pages 36 - 41

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract Objective The aim of the present study is to determine whether previous shoulder and knee injuries were associated with isokinetic fatigue index and agonist/antagonist ratio of shoulder internal/external rotators and knee flexors/extensors in male volleyball athletes. Methods The current study is a cross-sectional investigation of 49 male elite volleyball players competing at a high level in Brazil. Isokinetic fatigue index and agonist/antagonist profiles were assessed during the preseason. Additionally, in order to record previous injuries, the athletes answered a standardized questionnaire. We conducted a receiver operating characteristic (ROC) curve analysis to determine the association strength and the clinically relevant cut-off point for variables presenting statistical significance for the area under the curve (AUC) (α = 0.05). An independent t-test was used to compare isokinetic variables between athletes with and without previous injury (α = 0.05). Results The results of the ROC curve analysis indicated that hamstring fatigue index values at 300o/s were associated with the presence of previous knee injury (area under the curve [AUC] = 73%, p= 0.004), and shoulder external rotators fatigue index values at 360°/s were not associated with the presence of previous shoulder injury (AUC = 68%, p= 0.053). Conclusions Elite volleyball athletes who reported previous knee injuries were prone to a higher fatigue index than those reporting no injuries. Knee flexor resistance training might be useful for those athletes who reported knee injuries in the previous season.

Resumo Objetivo O objetivo deste estudo é determinar se lesões prévias de ombro e joelho estavam associadas ao índice de fadiga isocinética e razão agonista/antagonista dos rotadores internos/externos do ombro e flexores/extensores do joelho em jogadores de voleibol. Métodos Esta é uma investigação transversal com 49 jogadores de voleibol de elite que competem em alto nível no Brasil. O índice de fadiga isocinética e os perfis de agonistas/antagonistas foram avaliados durante a pré-temporada. Além disso, para registro de lesões anteriores, os atletas responderam a um questionário padronizado. Conduzimos uma análise da curva de característica de operação do receptor (receiver operating characteristic, ROC) para determinar a força de associação e o ponto de corte clinicamente relevante de variáveis com significância estatística na área sob a curva (AUC) (α = 0,05). Um teste t independente comparou as variáveis isocinéticas entre atletas com e sem lesão prévia (α = 0,05). Resultados Os resultados da análise da curva ROC indicam que os valores do índice de fadiga dos isquiotibiais a 300o/s foram associados à presença de lesão prévia no joelho (área soba a curva [AUC] = 73%, p= 0,004), enquanto os valores do índice de fadiga dos rotadores externos do ombro a 360°/s não foram associados à presença de lesão prévia no ombro (AUC = 68%, p= 0.053). Conclusões Atletas de voleibol de elite que relataram lesões anteriores no joelho estavam propensos a um índice de fadiga maior do que aqueles que não relataram lesões. O treinamento de resistência de flexores do joelho pode ser útil para atletas com relatos de lesões no joelho na temporada anterior.

https://doi.org/10.1055/s-0042-1745801

Macular dystrophies associated with Stargardt-like phenotypes
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Amaral, Rebeca A. S.

; Zin, Olivia A.

; Salles, Mariana V.

; Motta, Fabiana L.

; Sallum, Juliana Maria Ferraz

Arquivos Brasileiros de Oftalmologia

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2023, N. ahead

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

https://doi.org/10.5935/0004-2749.2021-0415

How many species of Mollusca are there in Brazil? A collective taxonomic effort to reveal this still unknown diversity
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Machado, Fabrizio M.

; Miranda, Marcel S.

; Salvador, Rodrigo B.

; Pimenta, Alexandre D.

; Côrtes, Mariana O.

; Gomes, Jaime A.J.

; Miyahira, Igor C.

; Agudo-Padrón, Ignacio

; Oliveira, Cléo D.C.

; Caetano, Carlos H.S.

; Coelho, Paulo R.S.

; D’Ávila, Sthefane

; Arruda, Eliane P. de

; Almeida, Sérgio M. de

; Gomes, Suzete R.

; Alvim, Juliana

; Galvão-Filho, Hilton

; L. Ferreira-Júnior, Augusto

; Marques, Rodrigo C.

; Martins, Inês

; Souza, Leonardo S. de

; Arruda, Janine O.

; Cavallari, Daniel C.

; Santos, Sonia B. dos

; Pedro, Natan C.

; Salles, Anna C. de A.

; Dornellas, Ana P.S.

; Lima, Tarcilla C. de

; Amaral, Vanessa S. do

; Silva, Fernanda S.

; Passos, Flávio D.

; Thiengo, Silvana S.

; Leite, Tatiana S.

; Simone, Luiz R.L.

Zoologia (Curitiba)

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2023, Volume 40 elocation e23026

Abstract: En | Text: En | PDF: En

ABSTRACT The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of species still unknown to science. A few countries have complete and integrated databases estimating the approximate number of species recorded for their territory, particularly in the Global South. In Brazil, a country of continental dimensions, revealing the richness of the second most diverse clade of invertebrates (=Mollusca) has been a goal of taxonomists. Recently, in an unprecedented, collective, and integrated effort among Brazilian malacologists, it was possible to estimate how many valid species of molluscs are there in Brazil. In this effort, more than 30 mollusc experts joined together to update the Taxonomic Catalogue of the Brazilian Fauna (TCBF), a governmental website that allows a quick and real-time updating of all Metazoan. So far, more than 5,000 updates have been made in TCBF, indicating the presence of 3,552 valid species of molluscs in Brazil, distributed among the main clades as follows: Caudofoveata (10 spp.), Solenogastres (6 spp.), Polyplacophora (35 spp.), Scaphopoda (43 spp.), Cephalopoda (92 spp.), Bivalvia (629 spp.) and Gastropoda (2,737 spp.). The present study, in addition to demonstrating for the first time the richness of Brazilian molluscs, also presents the state of the art of this important phylum of invertebrates highlighting its most representative and neglected groups.

https://doi.org/10.1590/s1984-4689.v40.e23026

10.

Antennal sensilla of two species of Gymnetis MacLeay, 1819 (Coleoptera: Scarabaeidae: Cetoniinae)
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Silva, Rayanne S.

; Amaral, Ester A.

; Fuhrmann, Juares

; Rodrigues, Sérgio R.

Revista Brasileira de Entomologia

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2023, Volume 67 N. 1 elocation e20220077

Abstract: En | Text: En | PDF: En

ABSTRACT The present study describes the morphology of the antennal sensilla of adults of Gymnetis holosericea (Voet, 1779) and Gymnetis rufilateris (Illiger, 1800). The adults of Gymnetis spp. were sexed and antenna of males and females were dissected. Both species have sensilla chaetica, trichodea, placodea (type I and II), coeloconica (type I and II), and ampullacea (or pore). Females of G. holosericea have a total of about 19,995 sensilla and males have about 23,273 sensilla, and females of G. rufilateris have about 16,633 sensilla and males have about 21,184 sensilla. Sensilla placodea are the predominant type of sensilla in males and females of G. holosericea and G. rufilateris.

https://doi.org/10.1590/1806-9665-rbent-2022-0077

11.

Antioxidants and cardioprotective effects of ethyl acetate fraction of Canavalia rosea leaves in myocardial ischemia-reperfusion injury
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FEITOSA, MARAÍSA B.J.

; ARAÚJO, SILVAN S.

; MESQUITA, THÁSSIO RICARDO R.

; GIODA, CAROLINA R.

; SÁ, LUCAS A. DE

; ALMEIDA, GRACE KELLY M.

; MIGUEL-DOS-SANTOS, RODRIGO

; BARBOSA, ANDRIELE M.

; VASCONCELOS, CARLA MARIA L. DE

; CAMARGO, ENILTON A.

; BARREIROS, ANDRÉ LUÍS B.S.

; ESTEVAM, CHARLES S.

; MORAES, ÉDER RICARDO DE

; AMARAL, RICARDO G.

; LAUTON-SANTOS, SANDRA

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Suppl. 1 elocation e20220514

Abstract: En | Text: En | PDF: En

Abstract Different degrees in the biological activities of Canavalia rosea had been previously reported . In this study, our group assessed the cardioprotective effects of the ethyl acetate fraction (EAcF) of the Canavalia rosea leaves. Firstly, it was confirmed, by in vitro approach, that the EAcF has high antioxidant properties due to the presence of important secondary metabolites, as flavonoids. In order to explore their potential protector against cardiovascular disorders, hearts were previously perfused with EAcF (300 μg.mL-1) and submitted to the global ischemia followed by reperfusion in Langendorff system. The present findings have demonstrated that EAcF restored the left ventricular developed pressure and decreased the arrhythmias severity index. Furthermore, EAcF significantly increased the glutathiones peroxidase activity with decreased malondialdehyde and creatine kinase levels. EAcF was effective upon neither the superoxide dismutase, glutationes reductase nor the catalase activities. In addition, the Western blot analysis revealed that ischemia-reperfusion injury significantly upregulates caspase 3 protein expression, while EAcF abolishes this effect. These results provide evidence that the EAcF reestablishes the cardiac contractility and prevents arrhythmias; it is suggested that EAcF could be used to reduce injury caused by cardiac reperfusion. However more clinical studies should be performed, before applying it in the clinic.

https://doi.org/10.1590/0001-3765202320220514

12.

Aerobiology in High Latitudes: Evidence of Bacteria Acting as Tracer of Warm Air Mass Advection reaching Northern Antarctic Peninsula
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CATALDO, MARCIO

; EVANGELISTA, HEITOR

; PEREIRA, JOSÉ AUGUSTO A.

; BERTHO, ÁLVARO LUIZ

; PELLIZARI, VIVIAN

; KUHN, EMANUELE

; SAMPAIO, MARCELO

; CUNHA, KENYA D. DA

; ALENCAR, ALEXANDRE S.

; ANJOS, DAFNE

; AMARAL, CESAR

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Suppl. 3 elocation e20210807

Abstract: En | Text: En | PDF: En

Abstract Despite the extent use of geochemical tracers to track warm air mass origin reaching the Antarctic continent, we present here evidences that microorganisms being transported by the atmosphere and deposited in fresh snow layers of Antarctic ice sheets do act as tracers of air mass advection from the Southern Patagonia region to Northern Antarctic Peninsula. We combined atmospheric circulation data with microorganism content in snow/firn samples collected in two sites of the Antarctic Peninsula (King George Island/Wanda glacier and Detroit Plateau) by using flow cytometer quantification. In addition, we cultivated, isolated and submitted samples to molecular sequencing to precise species classification. Viable gram-positive bacteria were found and recovered in different snow/firn layers samples, among dead and living cells, their number concentration was compared to northern wind component, stable isotopes of oxygen, d18O, and the concentration of crustal elements (Fe, Ti and Ca). Use of satellite images combined with air mass back-trajectory analysis obtained from the NOAA/ HYSPLIT model corroborated the results.

https://doi.org/10.1590/0001-3765202320210807

13.

Diagrammatic scale for the quantification of black spot severity in papaya leaves
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Francelino, Helenilson de Oliveira

; Vivas, Marcelo

; Moraes, Ramon de

; Saluci, Júlio Cesar Gradice

; Vivas, Janieli Maganha Silva

; Cruz, Derivaldo Pureza da

; Gravina, Geraldo de Amaral

; Silveira, Silvaldo Felipe da

Acta Scientiarum. Agronomy

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2023, Volume 45 elocation e60970

Abstract: En | Text: En | PDF: En

ABSTRACT. Black spot (Asperisporium caricae) is one of the main foliar fungal diseases of papaya crops. This disease acts directly on leaves and fruits causing leaf area reduction and fruit deterioration. The quantification of diseases is a fundamental part of the disease management and control process; therefore, a scale is required to help quantify black spot disease. The objective of this work was to propose a standardized methodology to quantify black spot severity in papaya leaves. A scale was developed considering the maximum and minimum values of the disease in the field that included eight levels of severity: 0.1, 0.3, 0.6, 1.0, 2.3, 5.0, 10.0, and 20.0%. Without the aid of a scale the disease is often overestimated, with absolute errors of approximately 75%. When the scale was used, 100% of the evaluators showed improved accuracy and precision, and absolute error was reduced to the 10% range. The scale also provided good repeatability and high reproducibility. The use of the scale provided an improvement in the R2 values, with mean values of 93 and 92 in the second and third evaluations, respectively, demonstrating that the scale is useful for different aspects of the pathosystem of A. caricae, such as for determining the efficiency of fungicides, characterization of varietal resistance, construction of the disease progression curve, and estimation of damage.

https://doi.org/10.4025/actasciagron.v45i1.60970

14.

Cytogenetic characterization of the golden mussel (Limnoperna fortunei) reveals the absence of sex heteromorphic chromosomes Limnoperna fortunei
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REIS, ARYANE C.

; AMARAL, DANIELLE

; AMERICO, JULIANA A.

; REBELO, MAURO F.

; SOUSA, SAULO M.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 N. 2 elocation e20201622

Abstract: En | Text: En | PDF: En

Abstract The golden mussel (Limnoperna fortunei) is an aggressive invasive species in South America, where it endangers native species and freshwater ecosystems, in addition to causing extensive economic losses, mainly to the hydroelectric sector. Currently, there’s no efficient control method available and the invasion has progressed across the continent. Its high reproduction rate is one of the key factors of the golden mussel’s high invasive potential and, recently, efforts have been done in order to understand the reproduction and the sexual features of this species. However, its cytogenetics characterization is incipient and the possible occurrence of sex-specific cytogenetic features was never investigated. In this study, we aimed to characterize the chromosomal morphometry, the distribution profile of heterochromatin, and to detect possible sex-related epigenetic marks in the golden mussel. Results revealed that the karyotypic structure is similar in both sexes and no chromosome heteromorphism was observed between males and females specimens. The data increment the cytogenetic characterization of Limnoperna fortunei and contribute for future studies that aim to further investigate its reproduction and underlying sex determination processes. America ecosystems losses sector Currently theres there s continent mussels recently However sexspecific specific investigated study morphometry heterochromatin sexrelated related specimens processes

https://doi.org/10.1590/0001-3765202320201622

15.

Recovery of a degraded area using Platycyamus regnellii (Fabaceae) saplings Fabaceae (Fabaceae
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Bispo, L. F.

; Demolin-Leite, G. L.

; Fagundes, W. M.

; Abreu, A. M. S. A.

; Santos, J. M. M. dos

; Oliveira, F. M. M.

; Silva, V. J.

; Souza, T. O.

; Silva, Y. O. R.

; Amaral, F. L.

Brazilian Journal of Biology

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2023, Volume 83 elocation e278702

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/1519-6984.278702

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