Low Soil Phosphorus Availability Increases Acid Phosphatases Activities and Affects P Partitioning in Nodules, Seeds and Rhizosphere of Phaseolus vulgaris

Adnane Bargaz, Mustapha Faghire, Neila Abdi, Mohamed Farissi, Bouaziz Sifi, Jean-Jacques Drevon, Mohamed Cherkaoui Ikbal and Cherki Ghoulam
Additional contact information
Adnane Bargaz: Team of Plant Biotechnology and Agrophysiology of Symbiosis, Faculty of Sciences and Techniques, PO Box 549, Marrakech 40000, Morocco
Mustapha Faghire: Team of Plant Biotechnology and Agrophysiology of Symbiosis, Faculty of Sciences and Techniques, PO Box 549, Marrakech 40000, Morocco
Neila Abdi: Grains Legumes Program, Field Corps Laboratory, National Institute for Agronomical Research of Tunisia, rue Hédi Karray, Ariana 2080, Tunisia
Mohamed Farissi: Team of Plant Biotechnology and Agrophysiology of Symbiosis, Faculty of Sciences and Techniques, PO Box 549, Marrakech 40000, Morocco
Bouaziz Sifi: Grains Legumes Program, Field Corps Laboratory, National Institute for Agronomical Research of Tunisia, rue Hédi Karray, Ariana 2080, Tunisia
Jean-Jacques Drevon: National Institute for Agronomical Research, UMR Functional Ecology, Soils Biogeochemistry & Agroecosystems, 2 Place Viala, Montpellier F34060, France
Mohamed Cherkaoui Ikbal: Regional Office of Agricultural Development of Haouz, Avenue Hassan II GUELIZ 2411, Marrakech 40000, Morocco
Cherki Ghoulam: Team of Plant Biotechnology and Agrophysiology of Symbiosis, Faculty of Sciences and Techniques, PO Box 549, Marrakech 40000, Morocco

Agriculture, 2012, vol. 2, issue 2, 1-15

Abstract: The effect of phosphorus (P) deficiency on phosphatases activities in N 2 -fixing legumes has been widely studied in hydroponic culture. However, the response of acid phosphatase (APase) and phytase in rhizosphere, nodules and seeds of Phaseolus vulgaris to low soil’s P-availability is not yet fully understood. In this study, six genotypes of N 2 -fixing P. vulgaris were grown under contrasting soil P-availabilities; i.e. , low (4.3 mg P kg −1 ) and sufficient (16.7 mg P kg −1 ) in the Haouz region of Morocco. At flowering and maturity stages, plants were harvested and analyzed for their phosphatases activities, growth and P content. Results show that, low P decreased nodulation, growth, P uptake and N accumulation in all the genotypes, but to a greater extent in the sensitive recombinant inbreed line 147. In addition, while seed P content was slightly reduced under low P soil; a higher P was noticed in the Flamingo and Contender large seeded-beans (6.15 to 7.11 mg g −1 ). In these latter genotypes, high APase and phytase activities in seeds and nodules were associated with a significant decline in rhizosphere’s available P. APase activity was mainly stimulated in nodules, whereas phytase activity was highly induced in seeds (77%). In conclusion, the variations of APase and phytase activities in nodules and seeds depend on genotype and can greatly influence the internal utilization of P, which might result in low P soil tolerance in N 2 -fixing legumes.

Keywords: acid phosphatases; nodules; phytase; low P soil; Phaseolus vulgaris; seeds (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2012
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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