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

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 a...

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Bibliographic Details
Published in:Plant and soil 2003-10, Vol.256 (2), p.291-301
Main Authors: Deka Boruah, H.P, Rabha, B.K, Saikia, N, Dileep Kumar, B.S
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Bacteria
bacterial colonization
Beans
Biological and medical sciences
biosynthesis
crop yield
Epidermis
Fundamental and applied biological sciences. Psychology
grain crops
hydrogen cyanide
Leaf area
leaf thickness
Leaves
Mesophyll
net assimilation rate
Phaseolus vulgaris
Plant growth
plant growth-promoting rhizobacteria
Plant roots
plant-growth promoting fluorescent pseudomonads
Plants
Pseudomonas
Rhizosphere
Root development
root growth
Seeds
Siderophores
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Summary: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.
ISSN:0032-079X
1573-5036
DOI:10.1023/A:1026197300684