Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

A novel method to alleviate arsenic toxicity in alfalfa plants using a deletion mutant strain of Sinorhizobium meliloti

Durga P. Panigrahi and Gursharn Singh Randhawa
Plant and Soil
Vol. 336, No. 1/2 (November 2010), pp. 459-467
Published by: Springer
Stable URL: http://www.jstor.org/stable/24130750
Page Count: 9
  • More info
  • Cite this Item
Preview not available
Preview not available

Abstract

Reduction in crop yield and contamination of food crops are major problems in many areas due to high soil arsenic content. In this study an aquaglyceroporin (AqpS) disrupted Sinorhizobium meliloti smk956 strain was found to accumulate 70.5% more arsenic than its parental strain S. meliloti Rm1021 under free living condition. This strain was inoculated onto alfalfa host plants under different arsenic concentrations (0, 1 and 5 mg/L) and its ability to alleviate arsenic toxicity in the host plant was investigated. At 1 and 5 mg/L arsenic concentrations the average arsenic contents in the shoots of the plants inoculated with the strain S. meliloti smk956 were 45.5 and 27.5% less than those of the plants inoculated with S. meliloti Rm1021, respectively. Under arsenic stress conditions the strain S. meliloti smk956 showed increased symbiotic efficiency than its parental strain. These results demonstrate a novel method to alleviate arsenic toxicity in alfalfa plants.

Page Thumbnails

  • Thumbnail: Page 
[459]
    [459]
  • Thumbnail: Page 
460
    460
  • Thumbnail: Page 
461
    461
  • Thumbnail: Page 
462
    462
  • Thumbnail: Page 
463
    463
  • Thumbnail: Page 
464
    464
  • Thumbnail: Page 
465
    465
  • Thumbnail: Page 
466
    466
  • Thumbnail: Page 
467
    467