Growth effects of the vesicular-arbuscular mycorrhizal fungus Glomus constrictum on maize plants in pot trials
1995
Omar, S.A. (Assiut Univ. (Egypt). Faculty of Science)
Maize plants were inoculated with Glomus constrictum in soil of low phosphorus content amended with five rates of P in the form of Ca3(PO4)2. Maize dry matter yield was increased by addition of P up to 30 and/or 60 mg P/kg soil, above that it began to decrease to reach at 100 mg P/kg a value similar to that of the control. At all P levels used, the shoot and root (total plant) dry mass of inoculated plants was significantly increased compared with the non-inoculated controls. Development of vesicular-arbuscular mycorrhizal fungus (VAM) monitored in terms of P contents in dry matter of maize revealed that the P content of plants not inoculated with G. constrictum was not influenced by P addition to soil. On the other hand, P content of maize plants inoculated with VAM was dramatically increased by increasing P levels of soil and was maximum at 30 mg P; above that it began to decline.
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