Abstract
The plant body is composed of various types of cell. The harmonious combination of cell division and cell expansion of individual cell types produces plant body of substantial size and distinct shape. Plant cells are surrounded by a rigid cell wall, and cell enlargement is achieved via re-construction of the cell wall architecture. Thus, we cannot understand the mechanism of cell expansion without understanding the re-construction mechanisms of the cell wall architecture. In many biochemical studies on both the cell wall architecture and the enzymes responsible for it's re-construction, hypocotyls of juvenile plants have been used as experimental materials, and it remains unclear whether individual cell-wall types are re-constructed by a common mechanism. By using oligonucleotide microarray and proteomics technology, we have identified cell-wall gene-sets specific for several cell types. Based on these results, we discuss the mechanisms of cell wall re-construction in individual cell types.
