Gibberellins are one of the classical five plant hormones and are diterpenoid weak acids. They are involved in several biological processes in plants such as starch hydrolysis during germination, fruit maturation, and stem elongation. Gibberellin mutants played a key role during the Green Revolution thanks to their sturdier semi-dwarf stature allowing increased yield.

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  • News & Views |

    Seed germination is tightly regulated so that it only occurs in optimal environmental conditions; for root parasitic plants, this is the presence of a potential host plant revealed by strigolactone exudates. New research shows that, unexpectedly, this response to strigolactone bypasses the core gibberellin-dependent pathway for germination.

    • Darren C. Machin
    •  & Tom Bennett
    Nature Plants 6, 602-603
  • News & Views |

    Gibberellins (GAs) control key growth and developmental processes in plants. Real-time monitoring of GA concentrations in living tissues is critical for understanding the actions of this hormone class. A first-generation optogenetic GA-nano-indicator now illuminates the effects of GA levels on cell length and light signalling.

    • Tamar Azoulay-Shemer
    • , Po-Kai Hsu
    •  & Julian I. Schroeder
    Nature Plants 3, 765-766
  • News & 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
    •  & Malcolm J. Bennett
    Nature Plants 3, 686-687
  • News & Views |

    Brassinosteroids and gibberellins are two principal growth-promoting hormones in plants. A transcription factor called JUB1 connects their signalling and biosynthesis through positive and negative feedback loops to finely coordinate developmental output.

    • Jun-Xian He
    Nature Plants 2, 16023