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Overexpression of AtNCED3 gene improved drought tolerance in soybean in greenhouse and field conditions
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Molinari, Mayla Daiane Correa
; Fuganti-Pagliarini, Renata
; Marin, Silvana Regina Rockenbach
; Ferreira, Leonardo Cesar
; Barbosa, Daniel de Amorim
; Marcolino-Gomes, Juliana
; Oliveira, Maria Cristina Neves de
; Mertz-Henning, Liliane Marcia
; Kanamori, Norihito
; Takasaki, Hironori
; Urano, Kaoru
; Shinozaki, Kazuo
; Nakashima, Kazuo
; Yamaguchi-Shinozaki, Kazuko
; Nepomuceno, Alexandre Lima
.
Abstract Water deficit is an important climatic problem that can impair agriculture yield and economy. Genetically modified soybean plants containing the AtNCED3 gene were obtained aiming drought-tolerance improvement. The NCED3 gene encodes a 9-cis-epoxycarotenoid dioxygenase (NCED, EC 1.13.11.51), an important enzyme in abscisic acid biosynthesis. ABA activates the expression of drought-responsive genes, in water-deficit conditions, targeting defense mechanisms and enabling plants to survive under low water availability. Results from greenhouse experiments showed that the transgene AtNCED3 and the endogenous genes GmAREB1, GmPP2C, GmSnRK2 and GmAAO3 presented higher expression under water deficit (WD) in the event 2Ha11 than in WT-plants. No significant correlation was observed between the plant materials and WD conditions for growth parameters; however, gas exchange measurements decreased in the GM event, which also showed 80% higher intrinsic water use when compared to WT plants. In crop season 2015/16, event 2Ha11 showed higher total number of pods, higher number of pods with seeds and yield than WT plants. ABA concentration was also higher in GM plants under WD. These results obtained in field screenings suggest that AtNCED3 soybean plants might outperform under drought, reducing economic and yield losses, thus being a good candidate line to be incorporated in the soybean-breeding program to develop drought-tolerant cultivars.
https://doi.org/10.1590/1678-4685-gmb-2019-0292
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2.
Brazilian guidelines for the diagnosis and treatment of cystic fibrosis
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Athanazio, Rodrigo Abensur
; Silva Filho, Luiz Vicente Ribeiro Ferreira da
; Vergara, Alberto Andrade
; Ribeiro, Antônio Fernando
; Riedi, Carlos Antônio
; Procianoy, Elenara da Fonseca Andrade
; Adde, Fabíola Villac
; Reis, Francisco José Caldeira
; Ribeiro, José Dirceu
; Torres, Lídia Alice
; Fuccio, Marcelo Bicalho de
; Epifanio, Matias
; Firmida, Mônica de Cássia
; Damaceno, Neiva
; Ludwig-Neto, Norberto
; Maróstica, Paulo José Cauduro
; Rached, Samia Zahi
; Melo, Suzana Fonseca de Oliveira
; Pinto, Leonardo Araújo
; Monte, Luciana Freitas Velloso
; Higa, Laurinda Yoko Shinzato
; Folescu, Tania Wrobel
; Marson, Fernando Augusto de Lima
; Sad, Isabela
; Servidoni, Maria de Fátima Correa Pimenta
; Kussek, Paulo
; Raskin, Salmo
; Zuana, Adriana Della
; Augustin, Albin
; Hoffmann, Anneliese
; Barbisan, Beatriz
; Hochhegger, Bruno
; Levy, Carlos Emilio
; Veiga, Claudine Sarmento da
; Ricachinevsky, Claudio
; Esposito, Concetta
; Escuissato, Dante
; Brandemburgo, Diego
; Marques, Elisabeth
; Aquino, Evanirso de
; Fischer, Gilberto Bueno
; Rodrigues, Joaquim Carlos
; Machado, Leticia
; Muramato, Lucia
; Costa, Lusmaia Damasceno Camargo
; Donadio, Marcio
; Castro, Marcos César Santos de
; Ribeiro, Maria Angela
; Santana, Maria Angélica
; Canan, Mariane
; Almeida, Marina Buarque de
; Britto, Murilo
; Dalcin, Paulo Roth Tarso
; Ramos, Regina Terse Trindade
; Chiba, Sonia
; Martins, Valéria de Carvalho
; Lacerda, Claudine
; Barbosa, Eliana
; Guimarães, Elizabet Vilar
; Hessel, Gabriel
; Gurmini, Jocemara
; Neri, Lenycia
; Nogueira, Marcelo Coelho
; Wayhs, Mônica Chang
; Simon, Miriam Isabel Santos
; Fernandes, Arlene Gonçalves dos Santos
; Silva, Claudia de Castro de
; Albuquerque, Cristiano Túlio Maciel
; Souza, Edna Lúcia
; Silva, Fernando Antonio de Abreu e
; Dalcin, Paulo de Tarso
; Noronha, Renata Maria de
; Teixeira, Ricardo
; Machado, Sandra Helena
; Camargo, Spencer Marcantonio
; Rozov, Tatiana
; Rodrigues, Ticiana da Costa
.
RESUMO A fibrose cística (FC) é uma doença genética autossômica recessiva caracterizada pela disfunção do gene CFTR. Trata-se de uma doença multissistêmica que ocorre mais frequentemente em populações descendentes de caucasianos. Nas últimas décadas, diversos avanços no diagnóstico e tratamento da FC mudaram drasticamente o cenário dessa doença, com aumento expressivo da sobrevida e qualidade de vida. Atualmente, o Brasil dispõe de um programa de ampla cobertura para a triagem neonatal de FC e centros de referência distribuídos na maior parte desses estados para seguimento dos indivíduos. Antigamente confinada à faixa etária pediátrica, tem-se observado um aumento de pacientes adultos com FC tanto pelo maior número de diagnósticos de formas atípicas, de expressão fenotípica mais leve, assim como pelo aumento da expectativa de vida com os novos tratamentos. Entretanto, ainda se observa uma grande heterogeneidade no acesso aos métodos diagnósticos e terapêuticos para FC entre as diferentes regiões brasileiras. O objetivo dessas diretrizes foi reunir as principais evidências científicas que norteiam o manejo desses pacientes. Um grupo de 18 especialistas em FC elaborou 82 perguntas clínicas relevantes que foram divididas em cinco categorias: características de um centro de referência; diagnóstico; tratamento da doença respiratória; tratamento gastrointestinal e nutricional; e outros aspectos. Diversos profissionais brasileiros atuantes na área da FC foram convidados a responder as perguntas formuladas pelos coordenadores. A literatura disponível foi pesquisada na base de dados PubMed com palavras-chave, buscando-se as melhores respostas às perguntas dos autores.
ABSTRACT Cystic fibrosis (CF) is an autosomal recessive genetic disorder characterized by dysfunction of the CFTR gene. It is a multisystem disease that most often affects White individuals. In recent decades, various advances in the diagnosis and treatment of CF have drastically changed the scenario, resulting in a significant increase in survival and quality of life. In Brazil, the current neonatal screening program for CF has broad coverage, and most of the Brazilian states have referral centers for the follow-up of individuals with the disease. Previously, CF was limited to the pediatric age group. However, an increase in the number of adult CF patients has been observed, because of the greater number of individuals being diagnosed with atypical forms (with milder phenotypic expression) and because of the increase in life expectancy provided by the new treatments. However, there is still great heterogeneity among the different regions of Brazil in terms of the access of CF patients to diagnostic and therapeutic methods. The objective of these guidelines was to aggregate the main scientific evidence to guide the management of these patients. A group of 18 CF specialists devised 82 relevant clinical questions, divided into five categories: characteristics of a referral center; diagnosis; treatment of respiratory disease; gastrointestinal and nutritional treatment; and other aspects. Various professionals working in the area of CF in Brazil were invited to answer the questions devised by the coordinators. We used the PubMed database to search the available literature based on keywords, in order to find the best answers to these questions.
https://doi.org/10.1590/s1806-37562017000000065
75529 downloads
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