In this essay we will discuss about the monocot and dicot stem. Essay # 1. Monocot Stem: Some monocotyledons belonging to the family Liliaceae have arborescent habit with woody stems like Dracaena, Yucca, Cordyline, Agave, Aloe etc. They exhibit an anomalous secondary growth in thickness producing a cambium which is abnormal both in position and function. After the cease of [...]
In this essay we will discuss about the external and internal secretory structures of plant tissues. Essay # 1. External Secretory Structures of Plant Tissues: External surfaces of the plant bear several secretory structures of epidermal origin or epidermal derivatives or emergences from deeper tissues. These include glands, glandular trichomes, nectaries, osmophores, hydathodes and salt glands. a. Glandular Trichomes: The [...]
In this essay we will discuss about the ground tissue system. This tissue system includes all the tissues excepting the epidermis and vascular bundles. Therefore, it is the largest tissue system beginning from the layer next to epidermis and continuing up to the centre point of the organ. Ground tissue system is heterogeneous in nature including diverse types of cells [...]