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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Systemic induction of the biosynthesis of terpenic compounds in Digitalis lanata.

A bacterial screening was carried out in the rhizosphere of two Digitalis species, D. thapsi and D. parviflora, both at the vegetative stage and at flowering. A total of 480 isolates were characterised at genus level, Bacillus being the dominant genera in all cases. Fifty percent of the Bacillus strains isolated from each species were analysed by PCR-RAPDs. At 85% similarity, 12 groups separated for D. thapsi and 18 for D. parviflora. One strain of each group was selected for biological assay on D. lanata, evaluating growth promotion and cardenolide content in leaves after inoculation performed in the root system. The plant parameters evaluated were leaf surface area, shoot and root dry weight and leaf number. Lanatoside C content was evaluated by HPLC. Only 17 strains caused significant increases in at least one of the parameters evaluated. The most striking result was that some strains promoted growth and increased cardenolide content at the same time. This effect was detected on leaves while inoculation was carried out on roots. Interestingly, these two parameters are not enhanced simultaneously under regular conditions in pot or in tissue cultures.[1]

References

  1. Systemic induction of the biosynthesis of terpenic compounds in Digitalis lanata. Gutierrez Mañero, F.J., Ramos, B., Lucas García, J.A., Probanza, A., Barrientos Casero, M.L. J. Plant Physiol. (2003) [Pubmed]
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