Volume 2 Issue 9, September 2016

Volume 2 Issue 9

Plane signalling

Two novel ROP-GAP proteins are necessary for correct orientation of cell plates during cytokinesis in Arabidopsis. The cell wall patterns of root meristem mutants defective in division plane maintenance are visualized by propidium iodide staining. 

See Nature Plants 2, 16120 (2016).

Image: S. Müller, E. Lipka Cover Design S. Whitham

Editorial

  • Editorial |

    Plants exist within a complex network of interactions with organisms both closely and distantly related to them. That none can survive ‘entire of itself’ is as true of plant science as the plants we study.

Research Highlights

News & Views

  • News & Views |

    The core of the photosynthetic complex photosystem I had been assumed to require contact with its associated light-harvesting complex I to function. But a mutant Arabidopsis line lacking the components of this complex shows that a plant's photosynthetic apparatus is more adaptable to changes in its environment than previously thought.

    • Dario Leister
  • News & Views |

    Many plants detect bacteria by the receptor FLS2 that binds the flagellin epitope flg22. A new pattern recognition receptor FLS3 in tomato detects flagellin from a second side; a further move in the evolutionary game of ‘hide and seek’ where pathogens evade recognition and hosts evolve novel immunoreceptors to detect them.

    • Judith Fliegmann
    •  & Georg Felix
  • News & 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
  • News & Views |

    Rising atmospheric CO2 is expected to boost crop yields during drought events because it promotes stomatal closure and saves water. However, field experiments with soybean in a simulated future CO2 atmosphere suggest that crop canopy interactions with climate might prevent this mechanism from delivering its expected benefits.

    • Colin P. Osborne

Reviews

  • Review Article |

    This Review summarizes current understanding of the non-self- and self-recognition systems of self-incompatibility and their evolution. The non-self-recognition model suggests that the transition from self-compatibility to self-incompatibility could be more common than previously thought.

    • Sota Fujii
    • , Ken-ichi Kubo
    •  & Seiji Takayama

Research

  • Article |

    Leaves vary their temperatures to improve their physiological performance. Theoretical considerations predict, and data for diverse taxa show, a moderate level of leaf thermoregulation maximizing net carbon assimilation.

    • Sean T. Michaletz
    • , Michael D. Weiser
    • , Nate G. McDowell
    • , Jizhong Zhou
    • , Michael Kaspari
    • , Brent R. Helliker
    •  & Brian J. Enquist
  • Article |

    FLS2 is the well-known plasma membrane receptor for flg22, a specific region of bacterial flagellin. But Solanaceae can also detect flagellin through another epitope, flgII-28, thanks to the novel receptor-like kinase FLS3 now identified in tomato.

    • Sarah R. Hind
    • , Susan R. Strickler
    • , Patrick C. Boyle
    • , Diane M. Dunham
    • , Zhilong Bao
    • , Inish M. O'Doherty
    • , Joshua A. Baccile
    • , Jason S. Hoki
    • , Elise G. Viox
    • , Christopher R. Clarke
    • , Boris A. Vinatzer
    • , Frank C. Schroeder
    •  & Gregory B. Martin
  • Letter |

    Two novel ROP-GAP proteins (PHGAP1/2) localize to cortical cell division site during cytokinesis in Arabidopsis. They interact with phragmoplast-orienting kinesins (POK), and are necessary for correct orientation of cell plates during division.

    • Dorothee Stöckle
    • , Arvid Herrmann
    • , Elisabeth Lipka
    • , Theresa Lauster
    • , Richard Gavidia
    • , Steffi Zimmermann
    •  & Sabine Müller
  • Article |

    In Arabidopsis, the Polycomb proteins mediate an epigenetic memory system that is important for gene silencing via histone methylation during development. Two novel deubiquitinases, UBP12 and UBP13, have now been identified and characterized in this regulatory network.

    • Maria Derkacheva
    • , Shujing Liu
    • , Duarte D. Figueiredo
    • , Matthew Gentry
    • , Iva Mozgova
    • , Paolo Nanni
    • , Min Tang
    • , Mattias Mannervik
    • , Claudia Köhler
    •  & Lars Hennig
  • Article |

    The predicted rise in CO2 levels during this century is expected to stimulate crop yields, offsetting losses from greater drought. But this study, using free-air CO2 enrichment, shows soybean yield gains dropping to zero as drought stress increased.

    • Sharon B. Gray
    • , Orla Dermody
    • , Stephanie P. Klein
    • , Anna M. Locke
    • , Justin M. McGrath
    • , Rachel E. Paul
    • , David M. Rosenthal
    • , Ursula M. Ruiz-Vera
    • , Matthew H. Siebers
    • , Reid Strellner
    • , Elizabeth A. Ainsworth
    • , Carl J. Bernacchi
    • , Stephen P. Long
    • , Donald R. Ort
    •  & Andrew D. B. Leakey
  • Article |

    A quadruple mutant of Arabidopsis lacking all four subunits of light harvesting complex I (LHCI) compensates by binding LHCII complexes to photosystem I instead. This maintained similar excitation energy transfer efficiency but with a much reduced absorption cross-section.

    • Mauro Bressan
    • , Luca Dall'Osto
    • , Ilaria Bargigia
    • , Marcelo J. P. Alcocer
    • , Daniele Viola
    • , Giulio Cerullo
    • , Cosimo D'Andrea
    • , Roberto Bassi
    •  & Matteo Ballottari