The effect of inoculation of pea plants with mycorrhizal fungi and Rhizobium on nitrogen and phosphorus assimilation
2006
Geneva, M.,Bulgarian Academy of Sciences, Sofia (Bulgaria). Acad. M. Popov Inst. of Plant Physiology | Zehirov, G.,Bulgarian Academy of Sciences, Sofia (Bulgaria). Acad. M. Popov Inst. of Plant Physiology | Djonova, E.,N. Poushkarov Inst. of Soil Science, Sofia (Bulgaria). Dept. of Soil Microbiology | Kaloyanova, N.,N. Poushkarov Inst. of Soil Science, Sofia (Bulgaria). Dept. of Soil Microbiology | Georgiev, G.,Bulgarian Academy of Sciences, Sofia (Bulgaria). Acad. M. Popov Inst. of Plant Physiology | Stancheva, I.,Bulgarian Academy of Sciences, Sofia (Bulgaria). Acad. M. Popov Inst. of Plant Physiology
The study evaluated the response of Pisum sativum cv. Avola to arbuscular mycorrhizal fungi (AM) species Glomus mosseae, Glomus intraradices and Rhizobium leguminosarum bv. viceae, strain D 293, regarding the growth, photosynthesis, nodulation and N fixation activity. Pea plants were grown in a glasshouse until the flowering stage (35 days) in 4 kg plastic pots using leached cinnamonic forest soil (Chromic Luvisols - FAO) at P levels of 13.2 (P1) and 39.8 (P2) mg/kg soil. The dual inoculation of pea plants significantly increased the plant biomass, photosynthetic rate, nodulation, and N fixation activity in comparison with single inoculation with Rhizobium leguminosarum bv. viceae strain D 293. On the other hand, coinoculation significantly increased the total P content in plant tissue, acid phosphatase activity and percentage of root colonization. The effectiveness of coinoculation with Rhizobium leguminosarum and Glomus mosseae was higher at low P level while the coinoculation with Glomus intraradices appeared to be the most effective at higher P level.
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