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Root-mediated sex recognition in a dioecious tree.

Tingfa Dong1, Junyu Li1,2, Yongmei Liao1

  • 1Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, and College of Life Sciences, China West Normal University, Nanchong, Sichuan, 637009, China.

Scientific Reports
|April 13, 2017
PubMed
Summary
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Dioecious plants can distinguish the sex of neighboring roots, altering their own root growth differently based on whether the neighbor is male or female. This suggests plants recognize root sexual identity.

Area of Science:

  • Plant biology
  • Ecology
  • Plant communication

Background:

  • Plants can identify neighboring roots (self, non-self, kin, non-kin).
  • Whether plants can discriminate root neighbors by sex is largely unknown.

Purpose of the Study:

  • To investigate if dioecious plants modulate root performance based on neighbor's sex.
  • To test if Populus cathayana exhibits sex-specific root responses.

Main Methods:

  • Dioecious Populus cathayana cuttings (male and female) were grown in pairs (same-sex or different-sex) or alone.
  • Root morphology, biomass, and allocation were analyzed under controlled greenhouse conditions.

Main Results:

  • Plants altered root growth in same-sex pairings but not in different-sex pairings.

Related Experiment Videos

  • Females with female neighbors showed enhanced root growth but reduced proliferation.
  • Males with male neighbors showed reduced root growth but increased proliferation.

    • Conclusions:

    • Populus cathayana root responses differ based on neighbor's sex, indicating recognition of sexual identity.
    • This suggests a novel mechanism of plant-plant interaction based on sex.