INFLUENCE OF ECTOMYCORRHIZAE ON THE GROWTH OF SEEDLINGS OF Eucalyptus grandis, Corymbia citriodora, Eucalyptus saligna AND Eucalyptus dunnii/INFLUENCIA DE ECTOMICORRIZAS NO CRESCIMENTO DE MUDAS DE Eucalyptus grandis, Corymbia citriodora, Eucalyptus saligna E Eucalyptus dunnii

• Published in: Ciência florestal Vol. 28; no. 2; p. 765
• Main Authors: Weirich, Sidinei Wolnei, da Silva, Rodrigo Ferreira, Perrando, Edison Rogerio, Da Ros, Clovis Orlando, Dellai, Alex, Scheid, Douglas Leandro, Trombeta, Helena Wichineski
• Format: Journal Article
• Language: Spanish
• Published: Universidade Federal de Santa Maria 01.04.2018
• Subjects: Brasil
• ISSN: 1980-5098
• DOI: 10.5902/1980509832129

The ectomycorrhizal association benefit plants by providing an increase in the area of root absorption and getting more nutrients and water as well as may enable growth of the host soils subjected to adverse conditions. The objective of this study was to evaluate the effect of different ectomycorrhizal isolates on seedling growth of Eucalyptus grandis W. Hill ex Maid., Corvmbia citriodora (Hook.) K. D. Hill & L.A.S. Johnson, Eucalyptus saligna Sm. and Eucalyptus dunnii Maiden. The design was completely randomized in a factorial arrangement (4 x 4), four species of Eucalyptus (Eucalyptus grandis, Corymbia citriodora. Eucalyptus saligna and Eucalyptus dunnii) and four ectomycorrhizal inoculum (UFSC-Pt116 (Pisolithus microcarpus (Cooke & Massee) Cunn), UFSC-132 (Pisolithus tinctorius (Pers.) Coker & Couch), UFSC-121, and without inoculation) with 12 repetitions. After ninety days of conducting the experiment were evaluated: the percentage of ectomycorrhizal colonization, plant height, stem diameter, number of leaves, dry weight of root and shoot. Relationships were also calculated: dry aerial/root dry mass, height/diameter and Dickson quality index. The plant height, leaf number and shoot dry mass showed higher average in the species Eucalyptus dunnii and Corymbia citriodora, when the inoculation with UFSC-132. Inoculation with UFSC-Pt116 resulted in 63,3 % of colonized roots in Corymbia citriodora, while Eucalyptus dunnii inoculated with UFSC-121 had 67,7 % of its colonized roots. The isolated UFSC-132 provides enhanced growth of seedlings of Eucalyptus dunnii and Corymbia citriodora compared to the control without inoculation. Keywords: Eucalyptus; mycorrhizae; seedling production; symbiosis. A associacao ectomicorrizica beneficia as plantas ao proporcionar aumento na area de absorcao radicular obtendo mais nutrientes e agua, podendo possibilitar o crescimento do hospedeiro em solos submetido a condicoes adversas. O objetivo deste trabalho foi avaliar o efeito de diferentes isolados ectomicorrizicos no crescimento das mudas de Eucalyptus grandis W. Hill ex Maid., Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson, Eucalyptus saligna Sm. e Eucalyptus dunnii Maiden. O delineamento foi inteiramente casualizado em arranjo fatorial (4 x 4), sendo quatro especies de eucalipto (Eucalyptus grandis, Corymbia citriodora, Eucalyptus saligna e Eucalyptus dunnii) e quatro inoculos ectomicorrizicos (UFSC-Pt116 (Pisolithus microcarpus (Cooke & Massee) Cunn), UFSC-132 (Pisolithus tinctorius (Pers.) Coker & Couch), UFSC-121, e sem inoculacao), com 12 repeticoes. Apos noventa dias de conducao do experimento foram avaliados: percentual de colonizacao ectomicorrizica, altura de planta; diametro do colo; numero de folhas; massa seca da parte aerea e radicular. Tambem foram calculadas as relacoes: massa seca aerea/ massa seca radicular, altura/diametro do colo e o indice de qualidade de Dickson. A altura de planta, numero de folhas e a massa seca aerea apresentaram medias superiores nas especies Eucalyptus dunnii e Corymbia citriodora, quando na inoculacao com UFSC-132. A inoculacao com UFSC-Pt116 resultou em 63,3% de raizes colonizadas em Corymbia citriodora, enquanto Eucalyptus dunnii inoculado com UFSC-121 teve 67,7% de suas raizes colonizadas. O isolado UFSC-132 proporciona maior crescimento de mudas de Eucalyptus dunnii e Corymbia citriodora em relacao a testemunha sem inoculacao. Palavras-chave: eucalipto; micorrizas; producao de mudas; simbiose.