Patterning

Patterning describes the processes by which the plan for later development of a plant is laid down. It involves the early establishment of 'prepatterns' of 'morphogens' which form a complex signalling network, which in turn determines further differentiation.

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  • News & Views |

    In Arabidopsis, the final size of the seed is determined early on during its development by the growth of a single multinucleate cell, the coenocytic endosperm. The endosperm arises from a second fertilization event, alongside the embryo, and dominates the onset of seed development while later nourishing and supporting embryo growth.

    • Wenjia Xu
    •  & Enrico Magnani
  • News & Views |

    In the phloem of vascular plants, distinct cell types are arranged in precise positions to ensure effective loading, transport and unloading of photosynthates and signalling molecules. Feedback between transcription factors and mobile peptides triggers and controls the differentiation of phloem at the growing root tip.

    • George Janes
    •  & Anthony Bishopp
    Nature Plants 8, 733-734
  • News & Views |

    Angiosperm evolution involves a major transition from spiral to whorled arrangements of floral organs. Examination of the genetic programs specifying floral organ identity in Nigella damascene, a species of Ranunculaceae with spiral flowers, illuminates the molecular basis of how spiral flowers can have flexible numbers of floral organs.

    • Douglas E. Soltis
    Nature Plants 2, 15211