Ancient reticulation, incomplete lineage sorting and the evolution of the pyrenoid at the dawn of hornwort diversification.

Background And Aims: Resolving the phylogeny of hornworts is critical in understanding the evolution of key morphological characters that are unique to the group, including the pyrenoid. Extensive phylogenomic analyses have revealed unexpected complexities in the placement of Leiosporoceros, the previously identified sister taxon to other hornworts. We explore the role of incomplete lineage sorting (ILS) and ancient reticulation in resolving interrelationships and comprehending the diversification and evolutionary processes within hornworts.

Plant biology: Mapping meristem morphogenesis in Marchantia.

The use of state-of-the-art imaging, underpinned by molecular data, for the first time provides a clear understanding of two fundamental processes in liverworts - the establishment of dorsoventrality and origin of apical meristems. This work opens the door to exploring many new facets of plant morphogenesis.

"Actually, I don't do different": Black parents' perceptions of gender socialization of sons versus daughters.

This study expanded on research examining families' roles in youth gender development that has investigated boys' versus girls' family experiences by using a within-family design to study the gender socialization of brothers versus sisters from the same families. We drew from archival data collected in 2001-2002 from an ethnic homogeneous sample of Black American mother-father families ( = 128) who were raising at least one son and one daughter; the majority of youth were adolescents (range 2-31 years). In separate home interviews, mothers and fathers described whether and how they socialized their sons versus daughters about education, their futures, and racism and discrimination.

The biology of subsp Bischl. & Boissel. Dub in nature.

Introduction: Though used as the model liverwort in culture for several decades, the biology of Marchantia polymorpha subsp. ruderalis in nature has never been documented in detail in a single account.

Methods: Here we synthesize routine field observations documented with hundreds of images of M.

Evolution of phenotypic disparity in the plant kingdom.

The plant kingdom exhibits diverse bodyplans, from single-celled algae to complex multicellular land plants, but it is unclear how this phenotypic disparity was achieved. Here we show that the living divisions comprise discrete clusters within morphospace, separated largely by reproductive innovations, the extinction of evolutionary intermediates and lineage-specific evolution. Phenotypic complexity correlates not with disparity but with ploidy history, reflecting the role of genome duplication in plant macroevolution.