High aluminum concentration and initial establishment of Handroanthus impetiginosus : clues about an Al non-resistant species in Brazilian Cerrado

作     者：Ane Marcela das Chagas Mendon ca Jean Marcel Sousa Lira Ana Luiza de Oliveira Vilela Daniel Amorim Vieira Nayara Cristina de Melo Joao Paulo Rodrigues Alves Delfi no Barbosa Ane Marcela das Chagas Mendon(c)a;Jean Marcel Sousa Lira;Ana Luiza de Oliveira Vilela;Daniel Amorim Vieira;Nayara Cristina de Melo;Jo(a)o Paulo Rodrigues Alves Delfino Barbosa

作者机构：Programa de Pós-Graduacao em Fisiologia VegetalDepartamento de BiologiaUniversidade Federal de LavrasLavrasMG 37200-000Brazil Programa de Pós-Graduacao em Ciências AmbientaisInstituto de Ciências ExatasUniversidade Federal de AlfenasAlfenasMG 37130-001Brazil Programa de Pós-Graduacao em FitotecniaDepartamento de AgriculturaUniversidade Federal de LavrasLavrasMG 37200-000Brazil Instituto Federal de Educacao Ciência e Tecnologia do ParáBelémPA 66093-020Brazil 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2020年第31卷第6期

页      面：2075-2082页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 0901[农学-作物学] 

基　　金：This study was financed in part by the Coordenacao de Aperfeicamento de Pessoal de Nível Superior-Brazil(CAPES)-Financial Code 001 and the Conselho Nacional de Desenvolvimento Científicoe Tecnológico-Brazil(CNPq)by providing scholarship for the authors. 

主　　题：Hormesis Low Al concentration Al toxicity Cerrado species Carbon assimilation 

摘      要：Cerrado soils are acidic and nutrient-poor,with high content of solubilized Al 3+.Plants growing in these conditions may display adaptations to cope with high aluminum concentrations especially during early developmental stages.We investigated leaf nutritional status,and photosynthetic and growth characteristics during the initial establishment of Handroanthus impetiginosus(Mart.Ex Dc.)Mattos,a secondary tree species distributed in the Brazilian Cerrado.Our goal was to understand leaf-level traits related to diff erent aluminum concentrations.H.impetiginosus plants were cultivated in four diff erent aluminum sulfate concentrations:0,1,2,and 4 mM Al,for 40 days.We performed analyses of growth,leaf gas exchange,chloroplast pigment content,and leaf mineral nutrients.We observed a linear increase of Al leaf content as a function of Al concentration in the nutrient solution.Plants grown in 1 mM Al showed a remarkable increase of K leaf content,net photosynthesis,stomatal conductance,and transpiration,while in 4 mM Al there were reductions of N,P,and K contents,gas exchange characteristics,and height.H.impetiginosus did not have mechanisms of avoidance,compartmentalization,or resistance to high Al concentrations.Indeed,this species showed a hormetic response,with low Al concentrations stimulating and high Al concentrations inhibiting plant responses.