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Efeito do cobre na população de bactérias e fungos do solo, na associação micorrízica e no cultivo de mudas de <i>Eucalyptus grandis </i>W. Hill ex Maiden, <i>Pinus elliottii</i> Engelm e <i>Peltophorum dubium </i>(Sprengel) Taubert

Authors: Antoniolli, Zaida Inês; Santos, Lílian Castilho dos; Lupatini, Manoeli; Leal, Lineu Trindade; Schirmer, Guilherme Karsten; Redin, Marciel;

Efeito do cobre na população de bactérias e fungos do solo, na associação micorrízica e no cultivo de mudas de <i>Eucalyptus grandis </i>W. Hill ex Maiden, <i>Pinus elliottii</i> Engelm e <i>Peltophorum dubium </i>(Sprengel) Taubert

Abstract

O cobre é um metal pesado que pode exercer efeitos tóxicos para micro-organismos e plantas. Os fungos ectomicorrízicos são capazes de proteger a planta hospedeira da toxidez dos metais pesados, mas a presença de certas concentrações de metais pode inibir o crescimento destes, prejudicando a simbiose micorrízica e alterar o desenvolvimento das plantas. O objetivo deste trabalho foi avaliar o efeito de doses de cobre na população de bactérias e fungos do solo, bem como seus efeitos na associação ectomicorrízica e no desenvolvimento de mudas de eucalipto, pinus e canafístula. O levantamento da população de micro-organismos do solo foi realizado em casa de vegetação durante 60 dias e os tratamentos foram doses de sulfato de cobre aplicadas ao solo (0,7; 0,708; 0,716; 0,724 mg kg-1 de solo) e mudas de eucalipto e pinus. No segundo experimento, mudas de eucalipto e canafístula inoculadas e não inoculadas com Pisolithus microcarpus (Cooke & Massee) Cunn (UFSC Pt 116) receberam doses de cobre de 0, 100, 200 e 300 mg kg-1 de solo. Aos 110 dias, avaliaram-se a massa fresca da parte aérea e radicular, massa seca da parte aérea, altura, diâmetro do colo e porcentagem de colonização ectomicorrízica. No primeiro experimento, a população total de bactérias e fungos do solo foi alterada pela presença do cobre, porém as mudas de eucalipto e pinus não mostraram efeitos da adição do cobre. No segundo experimento, a inoculação das mudas de eucalipto e canafístula com o isolado UFSC Pt 116 favoreceu o desenvolvimento da massa fresca da parte aérea e radicular e a altura das plantas. Conforme os resultados obtidos, a canafístula foi capaz de realizar associação ectomicorrízica com o isolado testado. O desenvolvimento das plântulas de eucalipto e canafístula foi inibido pelos níveis de cobre, mesmo inoculadas com o isolado UFSC Pt 116.

Keywords

micorrização, S, microrganismos, Agriculture, Forestry, SD1-669.5, mycorrhizal association, essências florestais, forest essences, microorganisms

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Average
Average
Average
Green
gold