Entries by Cecilia Vasquez-Robinet

A regulatory circuit conferring varied flowering response to cold in annual and perennial plants ($) (Science)

Regulation of flowering in time and space in perennials like Arabis alpina involves two systems. One uses orthologs to FLOWERING LOCUS C (FLC) from A. thaliana; in A. alpine is called PERPETUAL FLOWERING 1 (PEP1) and its repression enables flowering after vernalization. The other system uses microRNA156 (miR156), which allows the flowering response after vernalization […]

News and Views: Harnessing the potential of germplasm collections (Nature Genetics) ($)

There are more than 7 million crop accessions in gene banks around the world, however the information records for them are in multiple formats, making a comparison between and within collections difficult. Extrapolating from a new paper by Milner et al. (Nature Genetics 51: pages319–326) Langridge and Waugh suggest a framework to efficiently utilize this […]

Plant PRC2 subunit VRN2 stability regulation through oxygen dependent proteolysis

Polycomb repressive complex 2 (PRC2) represses the expression of its gene targets epigenetically and VERNALIZATION 2 (VRN2) is a subunit of the PRC2 complex in Arabidopsis. The PRC2-VRN2 complex, among other roles, regulates flowering after long cold exposure. Gibbs and coworkers identified VRN2 as a possible target for the N end rule pathway, since it […]

Finding candidate genes in maize with Camoco (Plant Cell)

Schaefer and colleagues have developed Camoco (Co-analysis of molecular components), which integrates data from GWAS and co-expression networks to identify high confidence candidate genes associated with a phenotype of interest. To evaluate the program they used GWAS and co-expression data from maize. They used gene expression data from three datasets: data from whole-seedling transcriptome from […]

Non-CG methylation mechanism in Marchantia polymorpha ($) (Plant Cell Physiol.)

Previous reports have shown that M. polymorpha DNA methylation status varies during its life cycle and it contains only one copy of the METHYLTRANSFERASE1 (MET1) orthologous gene. MET1 is responsible of CG methylation in angiosperms. Ikeda and collaborators generated MpMET mutants using the CRISPR/CAS9 system. The mutants showed abnormal shape, growth delay, reduced size and organs for asexual and sexual […]

Plant acclimation and growth under low temperature conditions mediated by REIL proteins

REIL1 and REIL2 proteins in Arabidopsis are homologs of REI1, a yeast ribosome biogenesis factor. REI1 facilitates 60S ribosomal maturation in yeast. Beine-Golovchuk and co-workers have studied the cold acclimation response of the double mutant reil1-1 reil2-1. Previous studies by the same group showed that the double mutant has growth defects below 10°C. In reil1-1 […]

Auxin regulates shoot stem cells

Auxin and cytokinin play critical roles in determination of cell fate in the shoot apical meristem (SAM). Until now auxin’s role was thought to be confined to the peripheral zone (PZ), promoting cell differentiation and organogenesis, mediated by AR5/MP. However, studies using GC-MS have shown the presence of IAA in the central zone (CZ). MP […]