Bryophytes are a group of small, non-vascular plants that include mosses, liverworts, and hornworts [...]

In plants infected with Potato leafroll virus (PLRV), or other luteoviruses, infection is very largely confined to cells in the vascular system. Even in tobacco plants transformed with PLRV full-length cDNA, in which all mesophyll cells should synthesize infectious PLRV RNA transcripts, only a minority of the mesophyll cells accumulate detectable amounts of virus. We have explored this phenomen...

Realizing pipe dreams – a detailed picture of vascular development This special issue of Journal of Experimental Botany focuses on the developmental mechanisms required to generate plant vascular tissue. The focus is Arabidopsis, including the three models for initial patterning involving the interaction of auxin and cytokinin, and going on to look at expansion and differentiation into xylem an...

Herbivory can aff ect plant community composition and diversity by removing biomass and reducing light competition. Herbivory may particularly benefi t low growing species such as bryophytes, which are frequently limited by light competition. Gastropods are important herbivores of seed plants and cryptogams, furthermore, they can disperse propagules such as seeds and spores via endozoochory. Ho...

Seminal works on vascular plants in Pennsylvania include the Flora of Pennsylvania (Porter 1903), Wild Flowers of Western Pennsylvania and the Upper Ohio Basin (Jennings and Avinoff 1953), and Atlas of the Flora of Pennsylvania (Wherry et al. 1979). Given the age of Porter's work and the fact that Jennings and Avinoff's publication included only western Pennsylvania, the major reference work on...