APPROACHES TO AND SUCCESSES IN DEVELOPING TRANSGENICALLY ENHANCED MYCOHERBICIDES

  • Jonathan Gressel
  • Sagit Meir
  • Yoav Herschkovitz
  • Hani Al-Ahmad
  • Inbar Greenspoon
  • Olubukola Babalola
  • Ziva Amsellem
Part of the NATO Security through Science Series book series

Abstract

Inundative mycoherbicides have not been successful in weed control in row crops, probably due to evolutionary barriers, and adding virulence factors was considered essential. Exogenous addition of the products of various geneswas used to ascertain synergy as a prelude to adding them transgenically. Transgenically over-expressing single “soft” genes (host lytic enzymes such as pectinase, cellulase and expansins, or natural hormones such as IAA), or “hard” genes encoding toxins such as NEP1 and CP1, has enhanced virulence, but not enough. Gene stacking to obtain synergies among the various genes is considered a top priority, both to achieve sufficient virulence and to delay the evolution of weed resistance to the fungal pathogens.

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Copyright information

© Springer 2007

Authors and Affiliations

  • Jonathan Gressel
    • 1
  • Sagit Meir
    • 1
  • Yoav Herschkovitz
    • 1
  • Hani Al-Ahmad
    • 2
  • Inbar Greenspoon
    • 3
  • Olubukola Babalola
    • 4
  • Ziva Amsellem
    • 1
  1. 1.Plant SciencesWeizmann Institute of ScienceRehovotIsrael
  2. 2.Department of Biology & BiotechnologyAn-Najah National UniversityNablusIsrael
  3. 3.Faculty of AgricultureHebrew University of JerusalemRehovotIsrael
  4. 4.Department of MicrobiologyOlabisi Onabanjo UniversityAgo-iwoyeNigeria

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