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Planta

, 231:397 | Cite as

Inoculation of tomato plants (Solanum lycopersicum) with growth-promoting Bacillus subtilis retards whitefly Bemisia tabaci development

  • José Humberto Valenzuela-Soto
  • María Gloria Estrada-Hernández
  • Enrique Ibarra-Laclette
  • John Paul Délano-Frier
Original Article

Abstract

Root inoculation of tomato (Solanum lycopersicum) plants with a Bacillus subtilis strain BEB-DN (BsDN) isolated from the rhizosphere of cultivated potato plants was able to promote growth and to generate an induced systemic resistance (ISR) response against virus-free Bemisia tabaci. Growth promotion was evident 3 weeks after inoculation. No changes in oviposition density, preference and nymphal number in the early stages of B. tabaci development were observed between BsDN-treated plants and control plants inoculated with a non-growth promoting Bs strain (PY-79), growth medium or water. However, a long-term ISR response was manifested by a significantly reduced number of B. tabaci  pupae developing into adults in BsDN-treated plants. The observed resistance response appeared to be a combination of jasmonic acid (JA) dependent and JA-independent responses, since the BsDN-related retardation effect on B. tabaci development was still effective in the highly susceptible spr2 tomato mutants with an impaired capacity for JA biosynthesis. A screening of 244 genes, 169 of which were previously obtained from subtractive-suppressive-hybridization libraries generated from B. tabaci-infested plants suggested that the BsDN JA-dependent ISR depended on an anti-nutritive effect produced by the simultaneous expression of genes coding principally for proteases and proteinase inhibitors, whereas the JA-independent ISR observed in the spr2 background curiously involved the up-regulation of several photosynthetic genes, key components of the phenyl-propanoid and terpenoid biosynthetic pathways and of the Hsp90 chaperonin, which probably mediated pest resistance response(s), in addition to the down-regulation of pathogenesis and hypersensitive response genes.

Keywords

Bacillus subtilis Bemisia tabaci Growth promoting rhizobacteria Induced systemic response Jasmonic acid Phenyl propanoids Salicylic acid 

Abbreviations

Cfu

Colony forming units

JA

Jasmonic acid

MeSA

Methyl salicylate

SA

Salicylic acid

SAR

Systemic acquired resistance

ISR

Induced systemic response

spr2

Suppressor of prosystemin-mediated responses2

Notes

Acknowledgments

This work was supported by two postgraduate scholarships (165105, to MGEH and 182416, to JHVS) granted by The National Council for Science and Technology (CONACyT, México). We are grateful to Dr. Víctor Olalde Portugal for the provision of the BsDN PGPR.

Supplementary material

425_2009_1061_MOESM1_ESM.doc (265 kb)
Supplementary material 1 (DOC 265 kb)

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • José Humberto Valenzuela-Soto
    • 1
  • María Gloria Estrada-Hernández
    • 1
  • Enrique Ibarra-Laclette
    • 1
  • John Paul Délano-Frier
    • 1
  1. 1.Unidad de Biotecnología e Ingeniería Genética de Plantas, Cinvestav - IrapuatoIrapuatoMexico

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