Phosphorus deficiency increases nodule phytase activity of faba bean–rhizobia symbiosis

摘要: The effect of phosphorus deficiency on growth, nodulation and phytase activity was studied in glasshouse for four symbioses involving two faba bean cultivars, namely Aguadulce (AG) Alfia (AL), local rhizobial isolates, RhF1 RhF2. P applied by adding 25 µmol Pi plant−1 week−1 to nutrient solution, whereas the sufficient control received 125 µmol plant−1 week−1. At flowering stage, plants were harvested assessment growth nodulation, N contents organs as well activities phosphatases nodules. latter highly stimulated deficiency, particularly AL–RhF1 symbiosis which shoot content not affected deficiency. Using situ RT-PCR, expression a plant histidine acid HAP gene detected nodule cortex under It is concluded that high constitutes mechanism adapt their nitrogen fixation