Superior plants. Mosses.Bryophytes.

Superior plants. Mosses: 

Superior plants. Mosses Lecture No. 11.

Vascular plants = superior plants : 

Vascular plants = superior plants Are plants that have tissues for transporting water , minerals, and photosynthetic products through the plant. A vascular system in plants is a series of tubes that can transport water and nutrients. C lubmosses H orsetail F erns G ymnosperms angiosperms

Bryophytes : 

Bryophytes Plants that produce an embryo are called Embryophytes (or Bryophytes ) M osses liverworts hornworts

Bryophytes: 

Bryophytes come from algae do not have vascular tissue produce gametangia and sporangia do not make flowers seedless

PowerPoint Presentation: 

The GAMETOPHYTE is DOMINANT, the sporophyte is parasitic on the gametophyte. sporophyte (2n) gametophyte (n)

Gametophytes : 

Gametophytes make gametes by mitosis multicellular gametangia protect gametophyte sperm have flagella and swim to eggs

Sporophytes : 

Sporophytes simple a single spore-forming organ ( sporangium ) make spores by meiosis multicellular have no branches stick to gametophyte wind transports spores

Liverwort: 

Liverwort 9,000 species gametophyte has a thallus Rhizoid stores water Marchantia Asexual reproduction : makes gemmae in cups on the gametophyte Sexual reproduction : gametophyte makes eggs with sperm, eggs make a zygote, a zygote goes to sporophyte

Liverwort: 

Liverwort

Mosses: 

Mosses 15,000 species Asexual reproduction : by fragmentation Sexual reproduction in the gametophyte sporophyte is in the sporangium do not have flowers or seeds Make food by photosynthesis grow on trees (!!! are never parasitic on the tree) have multi-cellular rhizoids need water to reproduce Grow in cool damp cloudy climates a weed

Mosses: 

Mosses

Sphagnum (= peat mosses): 

Sphagnum (= peat mosses) important for ecology lives in bogs acid-tolerant (archaeology) highly absorbent antibacterial

Sphagnum: 

Sphagnum

USE of peat mosses: 

USE of peat mosses fuel in planting mixes WW1: first-aid dressing for soldiers’ wounds Canada: diapers and napkins Finland: to make bread during famine Mexico: Christmas decoration