Y. Helariutta

Plasmodesmata act as unconventional membrane contact sites regulating inter-cellular molecular exchange in plants

The paper shows plasmodesmata function as ER-PM tubular membrane contact sites that regulate intercellular molecular exchange in plants through PI4P and MCTP proteins.

Pectin cell wall remodeling through PLL12 and callose deposition through polar CALS7 are necessary for long-distance phloem transport

This study identifies PLL12 and CALS7 as essential for phloem transport by remodeling pectin and callose in sieve pores, affecting long-distance symplastic transport.

In planta dynamics, transport-biases and endogenous functions of mobile siRNAs in Arabidopsis

This study investigates the dynamics, transport biases, and endogenous functions of mobile siRNAs in Arabidopsis, revealing their selective movement and regulatory potential.

An Arabidopsis root phloem pole cell atlas reveals PINEAPPLE genes as transitioners to autotrophy

The paper generates a single-cell atlas of Arabidopsis root phloem pole cells and identifies PINEAPPLE genes as key regulators in the transition to autotrophy.

Analysis of phloem trajectory links tissue maturation to cell specialization.

The paper reconstructs the protophloem developmental trajectory in Arabidopsis root cells to show how maturation gradients and transcription factors regulate cell specialization.

Blocking plasmodesmata in specific phloem cell types reduces axillary bud growth in Arabidopsis thaliana

The paper shows that blocking plasmodesmata in phloem cells of Arabidopsis reduces axillary bud growth rates without affecting bud activation.

Computational tools for serial block EM reveal differences in plasmodesmata distributions and wall environments

The paper develops computational tools for serial block electron microscopy to analyze plasmodesmata distribution and wall environment in Arabidopsis thaliana roots.

GSK3 activity is a cell fate switch that balances the ratio of vascular cell type

The study identifies GSK3 activity as a cell fate switch that regulates the ratio of sieve elements to companion cells in the phloem.

Structural imaging of native cryo-preserved secondary cell walls reveals presence of macrofibrils composed of cellulose, lignin and xylan.

This study uses cryo-SEM to image native secondary cell walls, revealing macrofibrils composed of cellulose, xylan, and lignin in both angiosperm and gymnosperm species.

ELIMAKI locus is required for mechanosensing and proprioception in birch trees

The study identifies a mutant birch tree (Elimaki) with impaired proprioception and radial growth, linking mechanical stress response to cell wall properties and transcriptomic changes.