Peanut nodulation kinetic in response to low pH and calcium

JORGE ANGELINI, TANIA TAURIAN, CAROLINA MORGANTE, FERNANDO IBAÑEZ, STELLA CASTRO AND ADRIANA FABRA, A.

PLANT PHYSIOLOGY AND BIOCHEMISTRY

ELSEVIER

Año: 2005 vol. 43 p. 754 - 759

0981-9428

Abstract In this work, the peanut nodulation kinetics by acid-sensitive and tolerant isolates under acid stress condition was analyzed. The results demonstrated that the acid pH produced a decrease in the number of nodules formed only when peanut plants were inoculated with acid-sensitive isolates but increased steadily by the addition of 10 mM Ca2+, reaching higher values than those obtained at pH 7.0. On the contrary, the peanut nodulation by acid-tolerant isolates was not affected by this stressing condition. These data suggest that acid-tolerant isolates could be used as a potential source of strains for preparing highly effective inoculants from peanut plants growing in acid soils.