Volume 5 Issue 7, July 2019

Volume 5 Issue 7

Pore relations

The heterodimer of SPEECHLESS and SCREAM directs differentiation of stomata on the plant epidermis, which facilitate gas exchange while minimizing water loss. Without SCREAM’s recruitment of inhibitory MAP kinases, all cells in the epidermis become stomata.

See Putarjunan, A. et al.

Image: Putarjunan, A. Cover Design: L. Heslop.

Editorial

  • Editorial |

    In supporting the 1909 land reform bill, Winston Churchill called land “by far the greatest of monopolies”, being the source of all wealth, strictly limited and fixed. One hundred and ten years later, land usage is again under scrutiny.

Books & Arts

Research Highlights

News & Views

  • News & Views |

    Receptor-mediated regulation of SPEECHLESS by a MAP kinase cascade coordinates cell fate specification during stomatal development. SCREAM functions as a scaffold to bring SPEECHLESS in proximity with MPK3/MPK6, thereby allowing its down-regulation to inhibit stomatal cell fate.

    • Huachun Larue
    •  & Shuqun Zhang
  • News & Views |

    The stigma has tightly regulated recognition mechanisms at several levels to prevent unwanted pollen from achieving fertilization. Knowledge about barriers controlling interspecific incompatibility is scarce. New evidence reveals a novel gene involved in regulating interspecies incompatibility in self-compatible Arabidopsis thaliana.

    • Noni Franklin-Tong
  • News & Views |

    A comprehensive analysis of genetic gains in winter wheat, spanning 50 years of breeding and conducted under a wide range of cropping systems, validates the inherent efficiency of breeding for optimal environments.

    • Matthew Reynolds
    •  & Hans Braun
  • News & Views |

    Atmospheric nitrogen deposits are overloading the ability of plant species to live and thrive. Bringing the complex and underestimated link between nitrogen and biodiversity to light is necessary to start restoration projects.

    • Stuart B. Weiss

Reviews

  • Perspective |

    Herbacious grain annuals in the mid-Holocene period were typically so hard to forage and eat that their use by humans was seen as a ‘last resort’, but this Perspective argues that a switch from animal to human dispersal allowed for domestication into the crops that became the foundation for societies around the world.

    • Robert N. Spengler III
    •  & Natalie G. Mueller
  • Perspective |

    The gametophyte phase is extremely reduced in angiosperms, reduced to a few haploid cells in flowers. This Perspective discusses recent studies in Marchantia polymorpha that have identified conserved components of gametogenesis.

    • Tetsuya Hisanaga
    • , Shohei Yamaoka
    • , Tomokazu Kawashima
    • , Asuka Higo
    • , Keiji Nakajima
    • , Takashi Araki
    • , Takayuki Kohchi
    •  & Frédéric Berger

Research

  • Brief Communication |

    In poplar, a quantitative genetic screen identifies a G-type lectin receptor-like kinase that mediates ectomycorrhizal symbiosis with Laccaria bicolor. Expression of the kinase in non-host Arabidopsis makes mycorrhizal colonization possible.

    • Jessy Labbé
    • , Wellington Muchero
    • , Olaf Czarnecki
    • , Juan Wang
    • , Xiaoping Wang
    • , Anthony C. Bryan
    • , Kaijie Zheng
    • , Yongil Yang
    • , Meng Xie
    • , Jin Zhang
    • , Dongfang Wang
    • , Peter Meidl
    • , Hemeng Wang
    • , Jennifer L. Morrell-Falvey
    • , Kevin R. Cope
    • , Lucas G. S. Maia
    • , Jean-Michel Ané
    • , Ritesh Mewalal
    • , Sara S. Jawdy
    • , Lee E. Gunter
    • , Wendy Schackwitz
    • , Joel Martin
    • , François Le Tacon
    • , Ting Li
    • , Zhihao Zhang
    • , Priya Ranjan
    • , Erika Lindquist
    • , Xiaohan Yang
    • , Daniel A. Jacobson
    • , Timothy J. Tschaplinski
    • , Kerrie Barry
    • , Jeremy Schmutz
    • , Jin-Gui Chen
    •  & Gerald A. Tuskan
  • Letter |

    In moss, a subgroup of uncharacterized AP2/ERF transcription factors called STEMIN promotes stem cell formation and regeneration, specifically through a repressive chromatin mark on its target genes.

    • Masaki Ishikawa
    • , Mio Morishita
    • , Yohei Higuchi
    • , Shunsuke Ichikawa
    • , Takaaki Ishikawa
    • , Tomoaki Nishiyama
    • , Yukiko Kabeya
    • , Yuji Hiwatashi
    • , Tetsuya Kurata
    • , Minoru Kubo
    • , Shuji Shigenobu
    • , Yosuke Tamada
    • , Yoshikatsu Sato
    •  & Mitsuyasu Hasebe
  • Article |

    The Early Cretaceous record of monocots is poor compared to other angiosperms. A well-preserved fossil monocot from the Crato plattenkalk limestone supports the possibility of an early radiation of monocots into the tropics of Northern Gondwana.

    • Clément Coiffard
    • , Nikolay Kardjilov
    • , Ingo Manke
    •  & Mary E. C. Bernardes-de-Oliveira
  • Article |

    Fossil fuel and fertilizer use has led to increased nitrogen and sulfur pollution deposition in the United States, introducing mixed impacts on herbaceous species that could impact ecosystems as well as the individual plants.

    • Christopher M. Clark
    • , Samuel M. Simkin
    • , Edith B. Allen
    • , William D. Bowman
    • , Jayne Belnap
    • , Matthew L. Brooks
    • , Scott L. Collins
    • , Linda H. Geiser
    • , Frank S. Gilliam
    • , Sarah E. Jovan
    • , Linda H. Pardo
    • , Bethany K. Schulz
    • , Carly J. Stevens
    • , Katharine N. Suding
    • , Heather L. Throop
    •  & Donald M. Waller
  • Article |

    Using large-scale data describing five decades of wheat breeding progress in western Europe, a study shows that breeding for high performance enhances wheat productivity under not only optimal conditions but also conditions with reduced agrochemical inputs.

    • Kai P. Voss-Fels
    • , Andreas Stahl
    • , Benjamin Wittkop
    • , Carolin Lichthardt
    • , Sabrina Nagler
    • , Till Rose
    • , Tsu-Wei Chen
    • , Holger Zetzsche
    • , Sylvia Seddig
    • , Mirza Majid Baig
    • , Agim Ballvora
    • , Matthias Frisch
    • , Elizabeth Ross
    • , Ben J. Hayes
    • , Matthew J. Hayden
    • , Frank Ordon
    • , Jens Leon
    • , Henning Kage
    • , Wolfgang Friedt
    • , Hartmut Stützel
    •  & Rod J. Snowdon
  • Article |

    Knockout of cytoplasmic male-sterility-associated genes using TALENs with mitochondria localization signals rescues male sterility in rice and rapeseed, validating the role of these genes, and provides a method for plant mitochondrial genome editing.

    • Tomohiko Kazama
    • , Miki Okuno
    • , Yuta Watari
    • , Shungo Yanase
    • , Chie Koizuka
    • , Yu Tsuruta
    • , Hajime Sugaya
    • , Atsushi Toyoda
    • , Takehiko Itoh
    • , Nobuhiro Tsutsumi
    • , Kinya Toriyama
    • , Nobuya Koizuka
    •  & Shin-ichi Arimura
  • Article |

    STIGMATIC PRIVACY 1 (SPRI1) encodes a stigma-specific plasma membrane protein. It ensures intraspecific fertilization by rejecting pollen tubes of distantly related species in a manner independent of self-incompatibility, thus functioning as an interspecies barrier mechanism.

    • Sota Fujii
    • , Takashi Tsuchimatsu
    • , Yuka Kimura
    • , Shota Ishida
    • , Surachat Tangpranomkorn
    • , Hiroko Shimosato-Asano
    • , Megumi Iwano
    • , Shoko Furukawa
    • , Wakana Itoyama
    • , Yuko Wada
    • , Kentaro K. Shimizu
    •  & Seiji Takayama
  • Article |

    Arabidopsis MPK3 and MPK6 are involved in many biological processes. How do they achieve their signalling specificity? Structural, biochemical and genetic approaches show that the bHLH protein SCREAM acts as a scaffold to recruit downstream substrates during stomatal development.

    • Aarthi Putarjunan
    • , Jim Ruble
    • , Ashutosh Srivastava
    • , Chunzhao Zhao
    • , Amanda L. Rychel
    • , Alex K. Hofstetter
    • , Xiaobo Tang
    • , Jian-Kang Zhu
    • , Florence Tama
    • , Ning Zheng
    •  & Keiko U. Torii
  • Article |

    In C4 grasses, malate is decarboxylated by NADP-malic enzyme in bundle sheath cells. The structures of maize and sorghum varieties identify amino acids important for catalytic efficiency, tetrameric structure and pH-dependent inhibition malate

    • Clarisa E. Alvarez
    • , Anastasiia Bovdilova
    • , Astrid Höppner
    • , Christian-Claus Wolff
    • , Mariana Saigo
    • , Felipe Trajtenberg
    • , Tao Zhang
    • , Alejandro Buschiazzo
    • , Luitgard Nagel-Steger
    • , Maria F. Drincovich
    • , Martin J. Lercher
    •  & Veronica G. Maurino