Algae are -bearing organisms that mostly live in aquatic environments. Identification: Mycelium branched and septate, presence of basidium and basidiospores. The main difference between Thallophyta Bryophyta and Pteridophyta is that the plant body of Thallophyta is a thallus while the plant body of Bryophyta shows stem-like, root-like, and leaf-like structures and the plant body of Pteridophyta is differentiated into true stem, root, and leaves. The life cycle of thallophytes has two independent generations. Trichomes are un-branched, cylindrical and devoid of sheath. Identification: Thallus blue-green in colour, cells devoid of conspicuous nucleus, absence of any sex organ, presence of gelatinous sheath around the cells, in most cases absence of organised cell organelles like plastids. Presence of cellulose cell wall.
Identification: Mycelium branched and septate, presence of basidiocarp, basidium and basidiospores. The vegetative hyphae are coenocytic with tapering branch tips. Thallophyta and Bryophyta do not consist of a true vascular system while Pteridophyta consists of a true vascular system. These plants consist of a true vascular system. The cells are uninucleate with a single large parietal chloroplast containing one or two pyrenoids.
Reproductive Structure: Zoosporangium: It is terminal in position formed by the modification of hyphal tips. It is made up of parenchymatous cells. Each cell is composed of two distinct halves frustules and each half is radially symmetrical and somewhat circular in outline Fig 2. There are no pit connections between the adjacent cells. You present a scenario, which ought not to be confused with an example.
Fungi are not plants, they do not produce their own food, but rather feed upon decaying matter. The number of oogonia in a sorus may be up to 10. Some types of fungi are involved in symbiotic relationships, for example, lichens a combination of a fungus and a green alga or a cyanobacterium and the mycorrhizae symbiosis between a fungus and the roots of a vascular plant. The hymenium which covers the whole surface of the fruit body usually consists of four-spored basidia. There is presence of ruptured host epidermal layer with exposed, stalked, one-celled uredospores.
The cell walls of fungi are of chitin or other noncellulose compounds. Fresh living trichome exhibits oscillating movement. You can take a plant with a root system and cut its top off. Reproductive Structure: Conidium: The conidia are developed on conidiophores in chain. Ferns, horsetails, Marsilea are some common examples of Pteridophytes. It is intercalary or terminal or even basal in position.
The word is derived from Greek words: angio: covered and sperma: seed. Oogonium: It is stalked, globose, borne single along with paraphyses. Teleutosorus: It is also seen on the upper surface of the infected wheat leaf. Thallus is yellowish green in colour. Reproductive Structure: Two types of sporangia are present as asexual reproductive organs: sessile sporangia and stalked sporangia. Reproductive Structure: Heterocyst: It is formed on secondary filament at intercalary position. Mycelium is composed of septate, branched hyphae.
Mycelium is septate and branched. Conidiophores are branched, slender and the aerial branches are composed of 2 — 3 cells. Sporangium: They are borne on the sporangiophore in a row and mature in basipetal succession. Each cell possesses a few discoid chloroplasts without pyrenoids and a nucleus. Zygospore is surrounded by a thick wall Fig. Fucus: Thallus Structure: The plant consists of a leathery parenchymatous, dichotomously branched ribbon like frond, stem-like stipe and a basal disc-like holdfast or hapteron by which it is attached to the substratum. The more complex brown algae and red algae are chiefly saltwater forms; the green color of the chlorophyll is masked by the presence of other pigments.
The filament is coenocytic and multinucleate cytoplasm. Bryophytes are the most primitive green plants according to the latest classification of plant Kingdom. Identification: Myceliam septate, basidia and basidiospores present. The sex organs of most thallophytes are unicellular. Cosmarium : Thallus Structure: The plant body is unicellular and non-motile. Oedogonium: Thallus Structure: The plant body is composed of un-branched filaments. Uredosorus: It is conspicuously present in the upper epidermis of the infected wheat leaf.
Reproductive Structure: Conidiophore: The vegetative hyphae produce branched conidiophore. Oxygen- Plants convert our waste Carbon Dioxide into oxygen. It is elongated, clavate and produces a number of zoospores inside. The cell is surrounded by a cell wall which is differentiated into firmer and mucilaginous portions. Hymenial layer is well developed and produces basidia around several minute cavities.
Each filament has a distinct sheath thin to thick. A liverwort is shown in figure 2. Paraphyses: They are uniseriatc, septate, filamentous. Each cell contains a barrel-shaped chloroplast having toothed edges forming a girdle in the equatorial region. Filaments are colonised in more or less radial or parallel order in hemispherical or spherical mucilaginous colony.