MICORRIZAS ARBUSCULARES NO CRESCIMENTO DE LEGUMINOSAS ARBÓREAS EM SUBSTRATO CONTENDO REJEITO DE MINERAÇÃO DE CARVÃO

CERNE

Stoffel, Shantau Camargo Gomes²  Soares, Claudio Roberto Fonseca Sousa²  Giachini, Admir José²  Gonzalez, David²  Armas, Rafael Dutra de²  Nicoleite, Carlos Henrique²  Rocha-Nicoleite, Edilane¹  Rossi, Márcio José²  Meyer, Edenilson² 

[1] Universidade Federal do Rio Grande do Sul, Pelotas, Brazil$$;Universidade Federal de Santa Catarina, Florianópolis, Brazil$$

关键词: Mycorrhizal colonization;    Environmental recuperation;    Trace-elements.;   

DOI  :  10.1590/01047760201622021969

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

The objective of this work was to evaluate the effects of arbuscular mycorrhizal inoculation in the growth, colonization and absorption of P and trace elements of leguminous trees on coal mine wastes. Independent assays for Mimosa scabrella Benth. (common name bracatinga), Mimosa bimucronata (DC.) Kuntze (maricá) and Parapiptadenia rigida (Benth.) Brenan (angico-vermelho) were carried out in a greenhouse on an entirely casualized experimental delineation composed of six treatments. Five coal mine autochthonous arbuscular mycorrhizal fungal isolates were tested, including Acaulospora colombiana, Acaulospora morrowiae, Dentiscutata heterogama, Rhizophagus clarus and Rhizophagus irregulars, aside from a control treatment, with four replications each. Results show that arbuscular mycorrhizal colonization was greater than 60% for Mimosa species, and up to 26% for Parapiptadenia. Overall, the fungal inoculation promoted better plant growth, with increments of up to 1430%. Phosphorous absorption was favored, especially when inoculation was done with A. colombiana, R. irregularis and A. morrowiae. Even though there was a conclusive reduction in the levels of trace elements in the plant´s shoots, the inoculation with those species of fungi promoted significant increments in the accumulated levels of As, Cu, Zn and Cr for all plant species tested. Therefore, arbuscular mycorrhizal fungi play important roles in these poor, degraded and often contaminated environments.

【 授权许可】

Unknown