Plant hormones

Definition

Plant hormones, also known as phytohormones, are chemicals that regulate plant cell processes. They are signal molecules produced within the plant functioning in extremely low concentrations.

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  • News and Views |

    Semi-dwarf cereal varieties have greatly increased crop yields due to their reduced stature, but they also reduce individual spike (ear) size. However, these traits appear to be regulated by distinct pathways, opening new opportunities to develop higher yielding crops.

    • Jonathan Atkinson
    • , Daniel von Wangenheim
    • , Leah R. Band
    •  & Malcolm J. Bennett
    Nature Plants 3, 686–687
  • News and Views |

    For multicellular organisms, long-distance communication is essential for coordination of organ growth and development. In higher plants, a dual root-to-shoot cytokinin signalling system plays a key role in adapting the growth of distant shoot organs to fluctuating environments.

    • Jean-Michel Davière
    •  & Patrick Achard
    Nature Plants 3, 17116
  • News and Views |

    A genetic screen in the model panicoid grass Setaria viridis reveals the importance of the auxin transporter AUX1 for inflorescence branching in maize, highlighting how model plants can accelerate gene discovery in complex crops.

    • Richard Sibout
    Nature Plants 3, 17060
  • News and Views |

    Abscisic acid (ABA) dynamically balances plant water use and availability. It is synthesized during water deficit and quickly catabolized into breakdown products previously thought to be largely inactive. New work demonstrates that phaseic acid, a major ABA catabolite, is a weak ABA receptor agonist with its own auxiliary role in water relations.

    • Jorge Lozano-Juste
    •  & Sean R. Cutler
    Nature Plants 2, 16137