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Acta Physiologiae Plantarum

, Volume 33, Issue 1, pp 203–209 | Cite as

Plant growth promoting bacteria enhance water stress resistance in green gram plants

  • D. SaravanakumarEmail author
  • M. Kavino
  • T. Raguchander
  • P. Subbian
  • R. Samiyappan
Original Paper

Abstract

Plant growth promoting bacterial (PGPB) strains Pseudomonas fluorescens Pf1 and endophytic Bacillus subtilis EPB5, EPB22, EPB 31 were tested for their capacity to induce water stress related proteins and enzymes in green gram (Vigna radiata) plants. Among the different bacteria used, P. fluorescens Pf1 increased the vigour index, fresh weight and dry weight of green gram seedlings in vitro. Quantitative and qualitative analyses of stress-related enzymes indicated the greater activity of catalase and peroxidase in green gram plants bacterized with P. fluorescens Pf1 against water stress when compared to untreated plants. The greater accumulation of proline was recorded in Pf1 treated plants compared to untreated plants. The pot culture study revealed the greater resistance to water stress by green gram plants treated with P. fluorescens Pf1 compared to untreated plants. The greater activity of stress-related enzymes in green gram plants mediated by PGPB could pave the way for developing drought management strategies.

Keywords

Bacillus subtilis Endophytes Plant growth promoting bacteria Pseudomonas fluorescens Water stress 

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2010

Authors and Affiliations

  • D. Saravanakumar
    • 1
    Email author
  • M. Kavino
    • 2
  • T. Raguchander
    • 1
  • P. Subbian
    • 3
  • R. Samiyappan
    • 1
  1. 1.Department of Plant PathologyTamil Nadu Agricultural UniversityCoimbatoreIndia
  2. 2.Horticultural College and Research InstituteTamil Nadu Agricultural UniversityCoimbatoreIndia
  3. 3.Department of AgronomyTamil Nadu Agricultural UniversityCoimbatoreIndia

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