Journal
ANNALS OF APPLIED BIOLOGY
Volume 157, Issue 2, Pages 259-271Publisher
WILEY
DOI: 10.1111/j.1744-7348.2010.00421.x
Keywords
Actinomycetes; Azotobacter; Bacillus; specific leaf weight; tuberisation
Categories
Funding
- Papa Andina Initiative of the International Potato Center (CIP)
- ALTAGRO
- Consejo Nacional de Sciencia, Tecnologia, e Innovacion Tecnologica (CONCYTEC), Peru
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The objectives of this study were to identify promising microorganisms to improve potato productivity in low-input systems of tropical highlands and to compare results from in vitro, greenhouse and field experiments to advance the development of a screening method for rhizobacteria and develop an efficient assessment of their effect on plant growth in field conditions. A total of 150 bacterial strains were screened in vitro, in greenhouse and field trials. The series of experiments confirmed the plant growth-promoting ability of a range of rhizobacteria. Although in vitro and greenhouse results were promising, the field experiment showed variability and the results require further verification. The in vitro tests might have limited value for screening as no correlation could be found between in vitro tests and pot trial results. However, trials in controlled conditions produced insights into the mechanisms causing better plant growth in potato, such as early tuberisation, fast development of leaf area and probably greater photosynthetic rates.
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