| 1 | Remodeling of the cell wall as a drought-tolerance mechanism of a soybean genotype revealed by global gene expression analysis显示文摘Drought stress is major abiotic stress that affects soybean production.Therefore,it is widely desirable that soybean becomes more tolerant to stress.To provide insights into regulatory mechanisms of the stress response,we compared the global gene expression profiles from leaves of two soybean genotypes that display different responses to water-deficit(BR 16 and Embrapa 48,drought-sensitive and droughttolerant,respectively).After the RNA-seq analysis,a total of 5335 down-regulated and 3170 up-regulated genes were identified in the BR16.On the other hand,the number of genes differentially expressed was markedly lower in the Embrapa 48,355 up-regulated and 471 down-regulated genes.However,induction and expression of protein kinases and transcription factors indicated signaling cascades involved in the drought tolerance.Overall,the results suggest that the metabolism of pectin is differently modulated in response to drought stress and may play a role in the soybean defense mechanism against drought.This occurs via an increase of the cell wall plasticity and crosslink,which contributed to a higher hydraulic conductance(Kf)and relative water content(RWC%).The drought-tolerance mechanism of the Embrapa 48 genotype involves remodeling of the cell wall and increase of the hydraulic conductance to the maintenance of cell turgor and metabolic processes,resulting in the highest leaf RWC,photosynthetic rate(A),transpiration(E)and carboxylation(A/Ci).Thus,we concluded that the cell wall adjustment under drought is important for a more efficient water use which promoted a more active photosynthetic metabolism,maintaining higher plant growth under drought stress. | Flaviane Silva Coutinho Juliano Mendonça Rodrigues Lucas Leal Lima Rosilene Oliveira Mesquita Paola Avelar Carpinetti João Paulo Batista Machado Camilo Elber Vital Pedro Marcus Vidigal Maria Eduarda Soares Ramos Mariana Rocha Maximiano Angela Mehta Maria Goreti Almeida Oliveira Elizabeth Pacheco Batista Fontes Humberto Josuéde Oliveira Ramos | 2021 | aBIOTECH2021，2，1： | 0 |
| 2 | Highlighting COVID-19:What the imaging exams show about the disease显示文摘Coronavirus disease 2019(COVID-19),a global emergency,is caused by severe acute respiratory syndrome coronavirus 2.The gold standard for its diagnosis is the reverse transcription polymerase chain reaction,but considering the high number of infected people,the low availability of this diagnostic tool in some contexts,and the limitations of the test,other tools that aid in the identification of the disease are necessary.In this scenario,imaging exams such as chest X-ray(CXR)and computed tomography(CT)have played important roles.CXR is useful for assessing disease progression because it allows the detection of extensive consolidations,besides being a fast and cheap method.On the other hand,CT is more sensitive for detecting lung changes in the early stages of the disease and is also useful for assessing disease progression.Of note,ground-glass opacities are the main COVID-19-related CT findings.Positron emission tomography combined with CT can be used to evaluate chronic and substantial damage to the lungs and other organs;however,it is an expensive test.Lung ultrasound(LUS)has been shown to be a promising technique in that context as well,being useful in the screening and monitoring of patients,disease classification,and management related to mechanical ventilation.Moreover,LUS is an inexpensive alternative available at the bedside.Finally,magnetic resonance imaging,although not usually requested,allows the detection of pulmonary,cardiovascular,and neurological abnormalities associated with COVID-19.Furthermore,it is important to consider the challenges faced in the radiology field in the adoption of control measures to prevent infection and in the follow-up of post-COVID-19 patients. | Lorena Sousa de Carvalho Ronaldo Teixeira da Silva Júnior Bruna Vieira Silva Oliveira Yasmin Silva de Miranda Nara Lúcia Fonseca Rebouças Matheus Sande Loureiro Samuel Luca Rocha Pinheiro Regiane Santos da Silva Paulo Victor Silva Lima Medrado Correia Maria José Souza Silva Sabrina Neves Ribeiro Filipe Antônio França da Silva Breno Bittencourt de Brito Maria Luísa Cordeiro Santos Rafael Augusto Oliveira Sodré Leal Márcio Vasconcelos Oliveira Fabrício Freire de Melo | 2021 | World Journal of Radiology2021，13，5： | 0 |
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