Bryophytes (Bryon=a mass; phytol)
Bryophytes are defined as multicellular, eukaryotic, a achlorophyllous, non-vascular plants having cell wall made of cellulose and their zygotes develop into an embryo
General characteristics of bryophytes
They occur in damp shady places.
Simplest land plants
Bryophytes are the simplest land plants.
Thalloid bodies Bryophytes
They have thalloid bodies which are not differentiated into true root, stem and leaves.
Instead of roots, they have unicellular hair like structure called rhizoids
Some Bryophytes have pseudo stem (not true stem)
Some Bryophytes have pseudo leaves
They do not have vascular bundles
They are needing Amphibians water for sexual reproduction because their male gametes are flagellated and motile.
They reproduce sexually as well as asexually.
Alternation of generation (life cycle)
Saprophytes show metamorphic alternation of generation. Its life cycle consists of two types of generation which alternation with each other.
- Gametophyte generation
- Sporophyte generation
The gametophyte generation reproduce sexually by producing male and female gametes, these two fuse to form zygote, which develops into embryo. This gives rise to sporophyte.
Spores are produced in sporophyte after meiosis. Each spore germinates into a gametophyte
Groups of bryophytes
Bryophytes are classified into three groups
Merchant have dichotomously branched dorsoventrally thalloid structure
Fun aria having rhizoids pseudo stem and leaves.
Anthoceros having horn like capsules.