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Plant and Soil

, Volume 256, Issue 2, pp 291–301 | Cite as

Fluorescent Pseudomonas influences palisade mesophyll development and spatial root development in Phaseolus vulgaris

  • H.P. Deka BoruahEmail author
  • B. K. Rabha
  • N. Saikia
  • B.S. Dileep Kumar
Article

Abstract

Three strains of plant growth promoting fluorescent Pseudomonads (HPR6, RRLJ008 and RRLJ134) were studied for their effect on growth and yield of French bean (Phaseolus vulgaris L.) under field conditions. The effect of these strains on nature of root development and leaf palisade tube length were also examined. The strains induced positive response on growth and physiological parameters resulting in higher yield in P. vulgaris. Strain HPR6 produced the most promising results in thickening of leaf palisade layer, spreading of lateral roots and production of root hairs. The increase in specific leaf weight (SLW), net assimilation rate (NAR) and relative growth rate (RGR) by these strains were 68%, 152% and 167%, respectively. The growth and yield parameters were also significantly improved compared to the uninoculated control. Antibiotic resistant mutant strains demonstrated that these bacteria effectively colonized the rhizosphere of French bean. The results suggest that the strains could be developed for field application on a large scale.

growth analysis plant growth promoting rhizobacteria root colonization seed bacterization 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • H.P. Deka Boruah
    • 1
    Email author
  • B. K. Rabha
    • 2
  • N. Saikia
  • B.S. Dileep Kumar
  1. 1.Soil MicrobiologyRegional Research Laboratory (Council of Scientific and Industrial Research)JorhatIndia
  2. 2.Crop PhysiologyAssam Agricultural UniversityJorhatIndia

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