Life Cycle Of Bryophytes

Bryophyte Life Cycle The bryophyte lifecycle consists of alternating generations between the haploid gametophyte and the diploid sporophyte.

Life cycle of bryophytes. The life cycle of bryophyte continues once the dormant spore starts germinating into protonema. Ø Bryophytes are terrestrial plants but require water at every stages in their life cycle Ø They grow usually in moist and shady places Ø They fail to complete its life cycle in the absence of water Ø Few bryophytes are truly aquatic and underwater forms example Riccia fluitans. The gametophyte produces haploid spores with only have the genetic material of gametophyte cells.

Muséum National dHistoire Naturelle Insititut de Systématique Évolution et Biodiversité UMR7205. Sex organs are formed on gametophyte. A bryophyte spore is haploid.

A haploid gametophyte cell contains a fixed number of unpaired chromosomes. Figure 1 As do all plants bryophytes alternate a gametophytic generation with a sporophytic one a sporic meiosis a life cycle in which meiosis gives rise to spores not gametes. But sporophytic phase is short lived and completely dependent upon gametophytes.

The antheridia male and archegonia female. Sex organs are multi-cellular and jacketed in bryophytes. Each of these stages is named for what they produce.

Bryophytes evolved important advances in both phases of the land plant life cycle. These key innovations allowed plants to colonize the land setting off a series of spectacular adaptive radiations first among bryophytes and later in vascular plants. A diagram illustrating how the life cycle of bryophytes alternates between the two generations.

The Bryophyte Life Cycle Bryophyte generations alternate between a sporophytic generation which means they use spores to reproduce and a gametophytic generation which means they use sperm and. In humans the egg and sperm cells are haploid. Gametangia produce the gametes eggs and sperm during the sexual part of the life cycle.