Work

The influence of soil water potential on the growth and survival of alfalfa rhizobia in the soil

Year: 2013

Type: article

Abstract: Growth and survival of alfalfa rhizobia (Rhizobium meliloti Dang.) from Pakistan and Nepal were studied in vials filled with sterile soil maintained at -0.03, -1.0, and -1.5 MPa. The main effects of water level, rhizobial strains and length of exposure to desiccation and their interactions showed a highly significant (P S 0.001) effect on the number of rhizobia g-1 of soil. Growth and survival of rhizobia were highest in soil at -0.03 MPa followed by soil at -1.0 and -1.5 MPa. Highest cell counts were observed for strain UL 136 followed by strain UL 222 and the lowest was for strain UL 61. Two rhizobial strains (UL 136 and UL 222) were most tolerant to desiccation and showed highest growth and survival under low water potential. These two strains probably could be used as inoculants for alfalfa production under arid and semiarid environments.

Source: Acta Societatis Botanicorum Poloniae

DOI: 10.5586/asbp.1997.008

Authors: Mohammad Athar, Douglas A. Johnson

Institutions: Pakistan Agricultural Research Council, Utah State University

Language: English

Topic: Legume Nitrogen Fixing Symbiosis

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Zero hunger, Life on land

Open Access status: gold

Estimated APC paid: $560