Record ID No. |
1706 |
Author(s) |
Cardoso, JA; deLemos, EEP; dosSantos, TMC; Caetano, LC; Nogueira, MA. , 2008 |
Affiliation |
Cardoso JA, Univ Fed Alagoas Ufal, Dept Fitotecn & Fitossanidade, BR 104 Norte, Km 85, BR-57100000 Rio Lago, AL, BRAZIL |
Title |
Mycorrhizal dependency of mangaba tree under increasing phosphorus levels |
Source. Vol.(no):Page |
Pesquisa Agropecuaria Brasileira, 43(7): 887-892 |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Country |
Brazil, South America |
Abstracts |
The ob objective of this study WaS to evaluate the mycorrhizal dependency of mangraba tree (Habcirbuania speciosa) plantlets, under increasing levels of phosphorus fertilization. The experimental design was completely randomized in a 4X5 factorial arrangements with three mycorrhizal fungi inocula - Gigaspora margarita, Glomus etunicatum, or a pool of native mycorrhizal fungi (Acaulospora longula, Glomus clarum, Gigaspora albida, Paraglomus sp.) - and a nonmychrrhizal control, in combination with five levels of phosphorus applied to the substrate: 0, 25, 50, 75, and 100 mg kg(-1). Kg(-1). After 180 clays of growth, plantlets with inoculation of native mycorrhizal pool produced more shoot and root dry biomass and had higher shoot phosphorus content and accumulation. The noninoculated control showed the lowest values, independently of the phosphorus level. The highest relative mycorrhizal dependency occurred with the inoculation of native mycorrhizal fungi. Plants with mycorrhizal fungi did not respond to phosphorus addition above 50 mg kg(-1). Mangaba tree is highly dependent oil mycorrhiza, but the degree of dependency varies according to phosphorus levels and fungal inocula. In general, mangaba tree is more responsive to mycorrhizal fungi inoculation than to phosphorus addition. |