Entries by Facundo Romani

Auronidins are a previously unreported class of flavonoid pigments that challenge anthocyanin biosynthesis evolved in plants (OA) (PNAS)

Plants produce pigments as a protective strategy against biotic and abiotic stress. In angiosperms, anthocyanins are the main flavonoids that play a role in this function. As the early-diverging land plant, Marchantia polymorpha also produces red pigments in response to environmental conditions, it was thought that anthocyanin biosynthesis was conserved, despite the pigment accumulated in […]

Deep conservation of cis-element variants regulating plant hormonal responses (Plant Cell)

Promoter regions upstream of transcription start sites contain DNA regulatory elements (RE) crucial for the transcriptional control of gene expression. However, REs are short degenerated sequences with low conservation during evolution. In this paper, Lieverman-Lazarovich et al. studied REs in core hormone response genes. The authors develop an alignment-free computational approach to find cases where […]

Review. Fellowship of the rings: a saga of strigolactones and other small signals (New Phytol)

Strigolactones are small signal molecules synthesized by plants. In the past few years, many studies highlighting the importance of this emerging phytohormone have been published. Strigolactones play important roles as a hormonal signals in plants and for mycorrhizal fungi interactions, they are present in all land plants, and the signaling pathways seem to be conserved. […]

Jasmonate-related MYC transcription factors are functionally conserved in Marchantia polymorpha ($) (Plant Cell)

In recent years, studies in the model bryophyte Marchantia polymorpha have provided insights on how the Jasmonic Acid (JA) pathway works in early diverging land plants, starting from its biosynthesis (Yamamoto et al., 2015; Koeduka et al., 2015), followed by perception (Monte et al, 2018) and co-repressor (Monte et al, 2019), and now, the transcription […]

Physcomitrella STEMIN transcription factor induces stem cell formation with epigenetic reprogramming (Nature Plants)

Insights into transcription factors (TFs) in non-flowering plants are increading thanks to the establishment of new bryophyte model organisms. In new work, Ishikawa et al. present STEMIN1, a Physcomitrella patens TF belonging to an uncharacterized subgroup of the AP2/ERF family. Physcomitrella undergo cell reprogramming when the leaf is cut, generating chloronema apical stem cells that […]

Conserved biochemical defenses underpin host responses to oomycete infection in liverwort (Curr Biol)

Marchantia polymorpha is an emerging model for plant molecular biology and has contributed to studies on development and plant-microbe interactions. Here, using RNA-seq and proteomics, Carella et al. present a detailed time-course analysis of Marchantia molecular responses to pathogen infection triggered by the oomycete Phytophtora palmitovora. By comparing Marchantia to tobacco responses, the authors show […]

Alternative usage of miRNA-biogenesis co-factors in plants at low temperatures (Development)

As in animals, plants produce microRNAs that are also key developmental regulators. Unlike some animals, plants are more exposed to environmental factors that alter cellular processes. Ré et al. show here that phenotypic defects produced by loss-of-function mutations in key proteins of Arabidopsis miRNA biogenesis machinery, such as SERRATE (SE) and HYPONASTIC LEAVES 1 (HYL1), […]

Arabidopsis FLL2 promotes liquid–liquid phase separation of polyadenylation complexes ($) (Nature)

The nucleus of plants cells, like other eukaryotes, is full of non-membranous compartments separated by liquid-liquid phases. These complexes are often called nuclear bodies and concentrate proteins and nucleic acids. Disordered protein domains play a critical in their formation. Here, Fang et al. aimed to study the function of FCA, an Arabidopsis protein required for […]

Chromatin signature and transcription factor binding provide a predictive basis for understanding plant gene expression (Plant Cell Physiol)

Machine learning is a booming research field, also in Plant Science. Here, Wu et al. use chromatin modifications and transcription factors to predict transcription levels in Arabidopsis and rice. This is not only important for prediction but also to understand the mechanisms underlying epigenetic regulation. For chromatin modifications, they studied the combinatorial effect of histone […]