The Arabidopsis receptor kinase IRK is polarized and represses specific cell division (Devel. Cell) ($)
Plant Science Research WeeklyOrientation of cell division decides daughter cell fate and is fundamentally important for tissue patterning and morphology. For instance, asymmetric cell division leads to the generation of new cell types; in contrast, symmetric division produces cells with similar identity in a proliferative manner.…
Plant gene editing through de novo induction of meristems ($) (Nature Biotechnol)
Plant Science Research WeeklyA fast method of gene editing using Agrobacterium was developed to deliver combinations of the developmental regulators including WUSCHEL and SHOOT MERISTEMLESS along with gene-editing reagents. The expression of specific developmental regulators led to the induction of meristems and expression of the…
Plants make galls to accommodate foreigners: some are friends most are foes (New Phytol)
Plant Science Research WeeklyGall formation by plants is a commonly-seen phenomenon that occurs in response to foreign entities (here called “gall-inducers”) such as viruses, bacteria, fungi, nematodes, etc. In this review Harris and Pitzschke set out criteria for what is and is not a gall; by definition the gall is a developmental…
Review: The many roads to (and from) multicellularity (J. Exp. Bot)
Plant Science Research WeeklyMulticellularity is without doubt a fantastic fluke. We know that it arose independently in plants and animals, but how many times? And is there a common “predisposition” to multicellularity in the universal common ancestor? These are the questions addressed in this review by Niklas and Newman. Looking…
RGF1 controls root meristem size through ROS signaling (Nature)
Plant Science Research WeeklyStem cells are maintained in the stem-cell niche by intercellular interactions and signaling networks in which a peptide hormone, the root meristem growth factor 1 (RGF1), is involved. RGF1 is also important in the control of the size of the meristematic zone and in the stability of the PLETHORA (PLT)…
NONSTOP GLUMES 1 regulates spikelet development in rice (Plant Cell)
Plant Science Research WeeklyRecently, several genes affecting rice architecture have been identified that may increase yields by increasing the number of grains formed, but as yet the genetic control of rice inflorescence architecture and organ identity is still being worked out. Zhuang et al. identified mutants of the NONSTOP…
Evolution of carnivorous traps from planar leaves through simple shifts in gene expression (Science)
Plant Science Research WeeklyWhen is a leaf not a leaf? When it’s a trap. Just about everyone, including Charles Darwin, has been fascinated by carnivory in plants, which involves the development of structures that capture or trap food. Whitewoods, Gonçalves, Cheng et al. investigated how traps form in the humped bladderwort…
Review: An evolutionary history of genes controlling carpel development (COPB)
Plant Science Research WeeklyCarpels, the female reproductive structures in angiosperms, are the most complex organs in plants. Most of the current knowledge about the molecular mechanism underlying carpel development derives from Arabidopsis. In a new review, Becker summarizes recent studies about the reconstruction of ancestral…
Review: Interplay between turgor pressure and plasmodesmata during development (J Exp Bot)
Plant Science Research WeeklyPlasmodesmata, small cytoplasmic channels connecting adjacent cells, allow small molecules to move and redistribute information and resources. Plasmodesmatal aperture is highly regulated, which is crucial to development and defense. Hernández-Hernández et al. review the contribution of turgor pressure…