We therefore need to spend some time discussing what we mean by the word a planta, which, perhaps surprisingly, does not have a simple or universally accepted definition. ... Superimposed on the phylogeny is a Venn diagram of major groups. ... In contrast, the non-vascular plants (hornworts and liverworts) are distinguished not only by the absence of phloem ... of proteins to make cellulose (the sugar polymer that is the primary component of plant cell walls), the cellulose rosettes.
|Title||:||Plant Genes, Genomes and Genetics|
|Author||:||Erich Grotewold, Joseph Chappell, Elizabeth A. Kellogg|
|Publisher||:||John Wiley & Sons - 2015-04-27|