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In leguminous plants, both the rhizobium genes and the plant genes influence nodulation and nitrogen fixation. Which one of the following functions is NOT encoded by the host plant genes?

  1. Production of inducers that modify rhizobial cell wall
  2. Production of flavonoid inducers
  3. Establishment of contact between bacteria and legume
  4. Root hair curling
in Plant, Animal and Microbial Biotechnology 1.4k points
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