Study Set Content:
major part of the gametophytes generation that produces the gametes
the “leafy” plant
grows from a “leafy” gametophyte produces the spores. It usually resembles a tiny can with a rimmed lid at the tip of a slender, upright stalk
sporophyte generation
None of the bryophytes appear closely related to other
living plants
lichens
reindeer moss
red algae
Irish moss
flowering plants
Spanish moss
look somewhat like large true mosses but are vascular plants with xylem and phloem.
Club mosses
species of mosses are currently known
15,000
Division of mosses
peat mosses, true mosses, and rock mosses
have no mesophyll tissue, stomata, or veins such as those of the leaves of more complex plants.
The "leaves" of moss gametophytes
The blades are nearly always only one cell thick, except at the midrib, which runs lengthwise down the middle, and they are never lobed or divided, nor do they have a petiole (leaf stalk
Division Bryophyta (mosses)
At the base there are rootlike rhizoids consisting of several rows of colorless cells that anchor the plant
Division Bryophyta (mosses)
Asexual reproduction of mosses
alternation of generations
It has been demonstrated under laboratory conditions that cells of archegonia and antheridia, paraphyses,“leaves”, stems, and rhizoids can develop
protonemata
Some mosses grow only in soils that are rich in
calcium
Some mosses grow only in soils that are rich in calcium; the presence of others indicates higher than usual
soil salinity or acidity
Some mosses have been used for
packing dishes and stuffing furniture,
Most important bryophytes to humans are the
mosses
Its extraordinary absorptive capacity made it very useful as a soil conditioner in nurses and as a component of potting mixtures. Live shellfish and other organisms are shipped in it
Mosses
The natural acidity produced inhibits bacterial, fungal growth and gives it antiseptic properties absorbency, which is greater than that of cotton, combined with the antiseptic properties made it a useful poultice material for application to wounds
Mosses
