Algae vs Bryophytes
Bryophytes are the most primitive land plants. They are immediate between aquatic and terrestrial life. Even though bryophytes are well adapted for the land life they require the presence of water for the completion of their life cycle. Most of the evolutionary biologists believe that bryophytes were originated from Algae. This belief is strongly supported by the similarities of many characters in algae and bryophytes. This post describes the similarities and difference between algae and bryophytes.
Learn more: Characteristis of Bryophytes
Similarities between Algae and Bryophytes
(1). In both groups the plant body is thalloid and undifferentiated.
(2). Plant body is not differentiated into root, stem and leaves in both groups.
(3). Gametophytic generation is the prominent phase in life cycle in both groups.
(4). True roots are absent in both groups of algae and bryophytes.
(5). Both groups are autotrophic in nutrition.
(6). In both algae and bryophytes major photosynthetic pigments are chlorophyll a, b and carotenes.
(7). Vascular tissue is absent in both groups.
(8). Cellulose is chief consistent of cell wall in both groups.
(9). In both groups starch is the reserve food material.
(10). Both groups possess pectin in their cell wall.
(11). In Chlorophyceae (algae) and Anthocerotales (bryophytes) the plastids contains pyrenoids.
(12). Both group can undergo vegetative reproduction by death and decay, fragmentation, and adventitious tubers.
(13). Presence of motile flagellated antherozoids in both groups.
(14). Flagella of antherozoids are whiplash type in both groups.
(15). Water is essential for fertilization in both groups.
(16). Filamentous protonema in the juvenile stage of bryophytes resembles the algal plant body.
(17). Alternation of generation is present in both groups.
Difference between Algae and Bryophytes
Algae Bryophytes 1 Plants are mostly aquatic Plants are mostly terrestrial 2 Plant body may be unicellular or multicellular Plant body always multicellular 3 Plant body does not show any division of labor Plant body shows division of labour (internally differentiated into photosynthetic and storage zones) 4 In each cell only one or few chloroplasts are present In each cells many chloroplasts are present 5 Every cell in the plant body is capable of growth and reproduction Only the apical cells are capable of growth and reproduction 6 Pores or stomata are absent Pores or stomata are present for gaseous exchange 7 Rhizoids usually absent, if present simple type Rhizoids present, sometimes two types (smooth walled and tuberculated) 8 Asexual reproduction is common by a variety of spores such as zoospores, aplanospores, hypnospores etc. Asexual reproduction is absent 9 Sexual reproduction may be isogamous, anisogamous or oogamous Sexual reproduction always oogamous type 10 Sex organs are usually unicellular Sex organs are always multicellular 11 Sex organs not covered with sterile jacket cells for production Sex organs are always covered with sterile jacket cells for protection 12 Female sex organ is oogonia Female sex organ is archegonia 13 Zygote undergo a resting period Zygote do not have any resting period 14 Zygote do not forms an embryo Zygote develops into an embryo 15 Sporophytic phase is highly reduced Sporophytic phase is well developed 16 Gametophytic and sporophytic generations are usually independent Gametophytic and sporophytic generations are dependent and physically connected 17 Alternation of generation usually isomorphic, rarely heteromorphic Alternation of generation always heteromorphic
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