ABSTRACT
Plants show a wide diversity of form and vary in the number and types of organs they possess. The major groups of organs, leaves, roots and stems are present in most plants. Plants consist of specialized cell types with differing functions. Plant organs are made of three types of tissue: dermal tissue, vascular tissue and ground tissues. The type and quantity of each tissue varies for each organ. Ground tissues lie under the epidermis and contribute to structural strength and function. Parenchyma cells are the most abundant cells found throughout the plant and form the bulk of organs like leaves, roots and stems. Reproductive tissues are of particular interest because they contain haploid cells with the gametic (n) number of chromosomes rather than the (2n) found in diploid somatic cells. By the application of cell culture techniques, haploid cells can generate haploid plants.
