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Provedor de dados:  PAB
País:  Brazil
Título:  Plant growth and phosphorus uptake in mycorrhizal rangpur lime seedlings under different levels of phosphorus
Autores:  Nogueira,Marco Antonio
Cardoso,Elke Jurandy Bran Nogueira
Data:  2006-01-01
Ano:  2006
Palavras-chave:  Citrus
Active external mycelium
Growth depression
Total external mycelium
Resumo:  The objective of this work was to evaluate the response of rangpur lime (Citrus limonia) to arbuscular mycorrhiza (Glomus intraradices), under P levels ranging from low to excessive. Plants were grown in three levels of soluble P (25, 200 and 1,000 mg kg-1), either inoculated with Glomus intraradices or left noninoculated, evaluated at 30, 60, 90, 120 and 150 days after transplanting (DAT). Total dry weight, shoot P concentration and specific P uptake by roots increased in mycorrhizal plants with the doses of 25 and 200 mg kg-1 P at 90 DAT. With 1,000 mg kg-1 P, mycorrhizal plants had a transient growth depression at 90 and 120 DAT, and nonmycorrhizal effects on P uptake at any harvesting period. Root colonization and total external mycelium correlated positively with shoot P concentration and total dry weight at the two lowest P levels. Although the highest P level decreased root colonization, it did not affect total external mycelium to the same extent. As a result, a P availability imbalance affected negatively the mycorrhizal symbiosis and, consequently, the plant growth.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira
Relação:  10.1590/S0100-204X2006000100013
Formato:  text/html
Fonte:  Pesquisa Agropecuária Brasileira v.41 n.1 2006
Direitos:  info:eu-repo/semantics/openAccess

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