Mesquite rhizobia isolated from the Sonoran Desert: Competitiveness and survival in soil

Nastaran H. Shoushtari, Ian L Pepper

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The competitiveness of a mesquite Rhizobium (AZ-M1) and its ability to survive in desert soils was compared to a selected commercial strain (31A5). In a greenhouse study, the native isolate out-competed strain 31A5 in nodule occupancy, when applied as a mixed inoculant to seed germinated and grown in sand culture, and irrigated with N-free nutrients. A high incidence of nodule double occupancy was found when double strain inoculants were used. The survival rate of the two strains was tested in three desert soils in a controlled laboratory study. The desert strain AZ-M1 grew and survived in all the soils for 1 month. The commercial strain 31A5, did not grow, and the population decreased in 14 days from 108 cells g-1 dry soil to below 104 cells g-1. Both strains survived to a lesser extent in a saline-sodic soil. A significant morphological change from a rod to a coccus was observed 2 days after strain 31A5 had been introduced into the desert soils.

Original languageEnglish (US)
Pages (from-to)803-806
Number of pages4
JournalSoil Biology and Biochemistry
Volume17
Issue number6
DOIs
StatePublished - 1985

Fingerprint

Prosopis
desert soil
Sonoran Desert
Rhizobium
rhizobacterium
competitiveness
Soil
desert
Soils
desert soils
sodic soil
soil
saline soil
seed
sand
nutrient
saline sodic soils
Greenhouses
Coccus
Seeds

ASJC Scopus subject areas

  • Soil Science
  • Biochemistry
  • Ecology
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Mesquite rhizobia isolated from the Sonoran Desert : Competitiveness and survival in soil. / Shoushtari, Nastaran H.; Pepper, Ian L.

In: Soil Biology and Biochemistry, Vol. 17, No. 6, 1985, p. 803-806.

Research output: Contribution to journalArticle

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