American Potato Journal

, Volume 69, Issue 4, pp 239–253 | Cite as

Hypoxic stress inhibits aerobic wound-induced resistance and activates hypoxic resistance to bacterial soft rot

  • Michael E. Vayda
  • Lyudmil S. Antonov
  • Z. Yang
  • William O. Butler
  • George H. Lacy
Article

Abstract

Resistance to bacterial soft rot in potato tubers maintained aerobically was induced by wounding tubers 4 to 24 h prior to inoculation withErwinia carotovora subsp.carotovora. This wound-induced resistance phenomenon was blocked by hypoxic stress. An hypoxia-induced resistance mechanism also was detected: tubers acclimated to a hypoxic environment were resistant to rot when inoculated with aerobically grownE. c. subsp.carotovora and incubated in atmospheres made hypoxic by argon or nitrogen. With increased pretreatment, hypoxia-induced resistance approached the levels of resistance observed in tubers inoculated with aerobic-adapted bacteria and incubated aerobically. Hypoxia-adaptedE. c. subsp.carotovora overcame hypoxia-induced resistance.

Additional Key Words

Erwinia carotovora subsp.carotovora anaerobic aerobic oxygen argon atmosphere nitrogen atmosphere potato Solanum tuberosum cvs. Superior Russet Burbank BelRus tuber 

Compendio

Se indujo resistencia a la pudrición blanda bacteriana en tubérculos de papa, mantenidos aeróbicamente, hiriéndolos 4 a 24 h antes de inocularlos conErwinia carotovora subsp.carotovora. Este fenómeno de inducción de resistencia mediante heridas fue bloqueado por estrés hipóxico. También se observó un mecanismo de resistencia inducida por hipoxia: los tubérculos aclimatados a un ambiente hipóxico fueron resistentes a la pudrición cuando se les inoculo conE. c. subsp.carotovora y se les incubó en atmósferas hipóxicas logradas con argón o nitrógeno. Con mayor pretratamiento, la resistencia por inducción de hipoxia alcanzó los niveles de resistencia observada en tubérculos inoculados con bacterias adaptadas a un medio aeróbico e incubadas aeróbicamente.E. c. subsp.carotovora adaptada a la hipoxia venció la resistencia inducida por la misma.

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Copyright information

© Springer 1992

Authors and Affiliations

  • Michael E. Vayda
    • 1
  • Lyudmil S. Antonov
    • 2
    • 3
  • Z. Yang
    • 3
  • William O. Butler
    • 5
  • George H. Lacy
    • 2
    • 3
  1. 1.Department of BiochemistryUniversity of MaineOrono
  2. 2.University Center for Environmental and Hazardous Materials Studies, Department of BiologyVirginia Polytechnic Institute and State UniversityBlacksburg
  3. 3.Laboratory for Molecular Biology of Plant Stress, Department of Plant Pathology, Physiology and Weed ScienceVirginia Polytechnic Institute and State UniversityBlacksburg
  4. 4.Department of BotanyUniversity of MarylandCollege Park
  5. 5.SIBIA, Inc.San Diego

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