CondiÃÃo micorrÃzica em espÃcies de passiflora e efeito da simbiose na promoÃÃo do crescimento

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Development of Passiflora species can be limited by the absence of mycorrhiza. The objectives of this work were to evaluate both the mycorrhizal colonization (MC) and glomerospores number (GN) in the rhizhosphere of P. cincinnata accessions in the field, and the effect of inoculation with Glomus etunicatum and phosphate fertilization on growth of P. cincinnata (accessions T03-36, C07-01 e A04-25) and P. setacea. For each species, the experimental design was completely randomized with four treatments (control, P, AMF and P+AMF) and 8 replicates. Every fifteen days were evaluated the height and the number of leaf and tendril were evaluated. At of the end of experiments leaf area (LA), fresh (FB) and dry (DB) biomass of shoots and roots, nutrient contents, mycorrhizal colonization (MC) and glomerospores number (GN) were evaluated. In the field, the MC and GN were significantly different among the rhizophere of accessions of P. cincinnata, with mean values of 0.35% of colonization and <1 glomerospore/50 g soil. In the general, mycorrhized plants of P. cincinnata (accessions T03-36 and A04-25), with or without P addition, significantly differed from those control of the and P supply regarding LA, FB, DB and MC. Mycorrhized plants of the accession C07-01 differed from the plants of the treatments in relation to LA, DB, MC and GN. Differences on height and leaf number were observed others 30 days after inoculation for both Passiflora species. P. cincinnata e P. setacea develop better when associated with AMF, but addition of P can reduce the number of glomerospores and mycorrhizal colonization and of these Passiflora species in the absence of AMF

ASSUNTO(S)

crescimento p. setacea adubaÃÃo fosfatada passifora cincinnata p. setacea glomus etunicatum phosphate fertilization growth passifora cincinnata biologia geral glomus etunicatum

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