Record ID No. |
969 |
Author(s) |
Nogueira,M.A., Cardoso,E.J.B.N , 2006 |
Affiliation |
Universidade Estadual de Londrina, Centro de Ciencias Biologicas, Dep. de Microbiologia, Caixa Postal 6001, CEP 86051-990 Londrina, PR, Brazil. |
Title |
Plant growth and phosphorus uptake in mycorrhizal Rangpur lime seedlings under different levels of phosphorus |
Source. Vol.(no):Page |
Pesquisa-Agropecuaria-Brasileira. 41(1), 93-99p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Fungal evaluation |
Host |
Citrus limonia |
Organism |
Glomus intraradices |
Country |
Brazil, S. America |
Abstracts |
A study was conducted 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 1000 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 1000 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. |