Entries by Philip Carella

A Small Peptide Signal Regulates Systemic Responses to Plant Water Status ($)

Plant organs perceive their immediate environment and communicate over both short and long distances to regulate the physiology of the affected organ as well as organs distal to the perceived stress. To accomplish this, plants utilize an impressive array of signalling molecules which range from small chemical signatures to macromolecules such as proteins and RNA. […]

Similar but Different: A Functionally Conserved of COI1 Receptor Recognizes Jasmonate Precursors in the Liverwort Marchantia polymorpha ($)

Land plants evolved from freshwater charophyte algae over 450 million years ago and have since diverged into the multitude of plant lineages observed today. The extent to which prominent plant hormones and cognate receptor proteins, which play essential roles in evolutionarily young angiosperms, are conserved across the green plant lineage is currently unknown. In a […]

To the VIKtor goes the Spoils: The Phytophthora infestans Effector Pi17316 Manipulates the Host MAP3K VIK to Promote Disease Susceptibility in Potato (OA)

Phytopathogens secrete effector proteins that enter and manipulate plant cells to facilitate microbial growth in planta. This is often achieved by exerting specific activity onto key host proteins to divert host cellular functions towards supporting pathogen growth. In a recently published article in Plant Physiology (2018), Murphy et al. describe the identification of the potato […]

Viewpoint: Cell-cell junctions: What’s their function? (New Phytol)

Plasmodesmata are contiguous cell-cell junctions that provide an avenue for intracellular (symplastic) communication between neighboring plant cells. In recent years, researchers have unravelled key aspects of plasmodesmata development and function in cell-cell signalling during a multitude of responses to endogenous or external stimuli. In a recent Viewpoint article, Lu et al. discuss these advances and […]

Deep evolutionary roots for the plant hormone auxin (eLIFE)

Auxin is an endogenous plant hormone that orchestrates complex tissue development across diverse green plant lineages. In a recent article, Mutte et al. performed a deep phylogenomics analysis of known and predicted auxin signalling mechanisms present in green plants and their algal predecessors. This analysis revealed interesting contributions of ancient proteins to the auxin response […]

A bacterial effector targets the master immune regulator NPR1 ($)

Pathogenic microbes translocate effector molecules into plant cells that subvert host immune responses and promote disease. In a recent article published in Cell Host & Microbe, Chen et al. (2017) describe an exciting new interaction between the Pseudomonas syringae effector AvrPtoB and its cognate host target: the master immune regulator NPR1. Intriguingly, the authors show […]

Damage-associated signals differentially impact nematode parasitism

Roots must protect themselves from a diverse range of microbial and animal pests. To accomplish this, plants have evolved sophisticated signalling machinery to detect the presence of these pests or to quickly react to the damage that they cause. In a recent study, Shah et al. identified host receptor proteins that detect the damage-associated release […]

Small peptides, big importance: Small, secreted peptides as novel regulators of symbiosis and nutrient acquisition

It is becoming increasingly evident that small, secreted peptides (SSPs) are important regulators of plant development and responses to stress. Traditional gene prediction algorithms are biased toward larger coding sequences and have therefore been inadequate in the hunt for plant SSPs. To address this gap in knowledge, de Bang et al. developed improved SSP prediction […]