Seletion of arbuscular mycorrhizal and ectomycorrhizal fungi for efficient symbiosis with Acacia mangium willd

Guilherme Augusto Robles Angelini, Orivaldo José Saggin Júnior, Eliane Maria Ribeiro da Silva

Abstract


Acacia mangium forms two kinds of mycorrhizal symbiosis, a arbuscular mycorrhizal fungi (AMFs) type and another with ectomycorrhizal fungi (fECTOs). The present study aimed to select different AMFs species and fECTOs isolates for effective symbiosis with A. mangium, which provide seedlings well colonized, nodulated and developed. Experiments were conducted in a greenhouse at Embrapa Agrobiology, one for AMF species selection and another for fECTOs, using a randomized block design with five replicates. Treatments were species AMFs (Acaulospora laevis, Acaulospora morrowiae, Entrophospora colombiana, Entrophospora contigua, Gigaspora margarita, Glomus clarum, Scutellospora calospora, Scutellospora heterogama, Scutellospora gilmorei and Scutellospora pellucida) or fECTOs isolated (UFSC Pt116; UFSC Pt24; UFSC Pt193; O 64–ITA6; UFSC Pt187 and O 40–ORS 7870). The AMFs species that promoted greater vegetative growth, mycorrhizal colonization and more effective symbioses were S. calospora, S. heterogama, S. gilmorei e A. morrowiae. The fECTOs not demonstrated effectiveness in promoting growth, but the isolate O64-ITA6 (Pisolithus tinctorius) provided greater colonization. Seedlings of A. mangium have high responsiveness to inoculation with AMFs and depends on high root colonization, between 40 and 80%, to obtain relevant benefits from symbiose over nodule formation and growth.


Keywords


Symbiotic effectiveness; Root colonization; Nodulation; Mycorrhizal benefit; Leguminous tree.



DOI: http://dx.doi.org/10.5433/1679-0359.2013v34n6Supl1p3529

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional