Data/hora: 10/06/2024 02:47:20

Provedor de dados: | 58
País: | Brazil
Título: | The interactive effect of phosphorus and nitrogen on "in vitro" spore germination of Glomus etunicatum Becker &amp;amp; Gerdemann, root growth and mycorrhizal colonization
Autores: | Bressan,Wellington.
Data: | 2001-12-01
Ano: | 2001
Palavras-chave: | Mycorrhiza; Glomus etunicatum; Spore germination; Root growth; Root colonization.
Resumo: | The effects of P and N amendment and its interactions on spore germination, root growth and colonized root length by Glomus etunicatum Becker &amp;amp; Gerdemann (INVAM S329) was studied "in vitro" in RiT - DNA transformed roots of Anthylis vulneraria sub sp. Sampaiana (Kidney vetch). Three N media concentrations (5, 10 and 50 mg/l) at P constant level (2 mg/l) and three P media concentrations (2, 10 and 20 mg/l) at N constant level (5 mg/l) were utilized as a treatment. Bécard &amp;amp; Fortin medium was used as a basal medium for root growth and colonized root length, and water/agar (0.8%) media was the control for spore germination. Spore germination of G. etunicatum at low P level was reduced by N addition in relation to the control media, and at low N level addition of P stimulated spore germination. Total root length was stimulated by N addtion at low P level, but no significant difference (p£0.05) was observed between 10 and 50 mg/l of N. P addition at low N level media also stimulated total root growth, and a significant difference (p£0.05) was observed among P concentrations. Colonized root length by G. etunicatum increased significantly (p£0.05) with P additions at low N levels. Under low P level no significant differences was found between 10 and 50 mg/l of N. These results demonstrate that the interaction between P and N affect differently spore germination, root growth and colonized root lenght.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400004
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822001000400004
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.32 n.4 2001
Fonte: | info:eu-repo/semantics/openAccess