[Molecular mechanisms of meiotic recombination suppression in plants].

Meiotic recombination not only ensures the stability of chromosome numbers during the sexual reproduction in eukaryotes, but also shuffles the maternal and paternal genetic materials to generate genetic diversity in the gametes. Therefore, meiotic recombination is an important pathway for genetic diversity, which has been considered as a major driving force for species evolution and biodiversity in nature. In most eukaryotes, meiotic recombination is strictly limited, despite the large variation of physical genome size and chromosome numbers among species, but the mechanisms suppressing meiotic recombination remain elusive.

Biocompatibility and in vivo osteogenic capability of novel bone tissue engineering scaffold A-W-MGC/CS.

Background: This study aims to investigate the biocompatibility and in vivo osteogenic capability of the novel bone tissue engineering scaffold apatite-wollastonite-magnetic glass ceramic/chitosan (A-W-MGC/CS).

Methods: Rabbit bone marrow stromal cells (BMSCs) were transfected with adenovirus-human bone morphogenetic protein-2-green fluorescent protein (Ad-hBMP2-GFP). The transfected BMSCs were then inoculated onto the scaffold material A-W-MGC/CS to construct tissue-engineered bone.