Entries by Linda Palmer

A Tip-Localized Phospholipid Is Key for Polar Growth of Pollen Tubes

Zhou et al. demonstrate that phosphatidylserine regulates Rab GTPase-mediated vesicle trafficking and polar growth of pollen tubes. Plant Cell https://doi.org/10.1105/tpc.19.00844 Background: Pollen tube growth is an indispensable event during double fertilization in flowering plants. This peculiar polarized cell growth, in which the elongation occurs only at the tip area and the growth rate is exceedingly […]

A Toolkit for Proximity-Dependent Biotinylation in Plants

In a systematic multi-lab study, Arora et al. apply a variety of proximity-dependent biotin labelling approaches using several different plant systems and bait proteins, to demonstrate its wide applicability for the plant community. Plant Cell https://doi.org/10.1105/tpc.20.00235. Background: Protein-protein interaction studies rely on preserving the interaction between the bait and prey proteins throughout the process of […]

How do Chromosomes Evolve via Unstable Intermediates?

Yalin Liu, Handong Su, Jing Zhang, et al. explore centromere birth and death by inducing rearrangements via pollen irradiation in maize. Plant Cell https://doi.org/10.1105/tpc.20.00389 Background: The centromere is one of the most important components of chromosomes. Every normal chromosome has one functional centromere. The centromere is essential for accurate orientation and distribution during each cell […]

Plant Metabolic Redox Dynamics–Live!

Steinbeck et al. investigate in vivo NAD redox dynamics in Arabidopsis. Plant Cell https://doi.org/10.1105/tpc.20.00241 By Janina Steinbeck and Markus Schwarzländer Background: All organisms rely on their cellular metabolism to live, develop, grow, and procreate. Metabolism provides the energy, building blocks, and reductant (i.e., electrons) needed for these activities. A major proportion of the total electron […]

A Geminivirus Exploits the Host Machinery to Inhibit Methylation-mediated Defense Responses

Chen et al. uncover a strategy used by a DNA geminivirus to exploit the host machinery in order to inhibit methylation-mediated defense responses when establishing infection. The Plant Cell (2020) https://doi.org/10.1105/tpc.20.00249.  Background: Geminiviruses belong to one of the largest and most important families of plant viruses, with genomes comprising one or two single-stranded circular DNAs. […]

Chemical labeling of proteins in live plant cells

Iwatate et al. demonstrate that SNAP-tag technology can be used to label plant cell proteins. Plant Cell https://doi.org/10.1105/tpc.20.00439 By Ryu J. Iwatatea,b, Akira Yoshinaria, Noriyoshi Yagia, Wolf B. Frommera,c, and Masayoshi Nakamuraa a Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya 464-8601, Japan b School of Medicine, Nagoya University, Showa, Nagoya 466−8550, Japan c […]

The role of arabinogalactans in plant development

López-Hernández et al. reveal that arabinogalactans function in calcium signaling from outside to inside the cell. Plant Cell https://doi.org/10.1105/tpc.20.00027 Federico López Hernández and Paul Dupree University of Cambridge, Department of Biochemistry, Tennis Court Road, Cambridge, CB2 1QW UK Background: Arabinogalactan (AG) is a complex carbohydrate, made of sugars, that surrounds all plant cells. No one […]

Chilling Lessons from Sugar Beets: Switching Sources

Rodrigues et al. found that the source and sink identities of sugar beet shoots vs. taproots are switched upon vernalization (chilling) due to a cold-induced reversal of the phloem stream. Plant Cell https://doi.org/10.1105/tpc.20.00072 By Cristina Martins Rodriguesa, Christina Müdsamb and Benjamin Pommerreniga a Plant Physiology, University of Kaiserslautern, Kaiserslautern, Germany b Biochemistry, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, […]

Oryza sativa RNA-dependent RNA polymerase 6 modulates rice meiosis

Liu et al. connect small RNA biogenesis and meiotic recombination by examining RNA-dependent RNA polymerase 6. The Plant Cell https://doi.org/10.1105/tpc.20.00213   By Changzhen Liu, Yi Shen and Zhukuan Cheng  Background: Meiosis is a specialized cell division that takes place in sexually reproducing eukaryotes and homologous recombination during meiosis increases diversity. During meiosis, homologous recombination is […]