University:
Meredith College
Course:
BIO-211 | Plant Biology
Academic year:

2024
Views:

391

Pages:

2
Author:

Amy TGT

Land Plants Bryophytes Vascular plants: contain xylem and phloem Non-vascular plants: do not contain either Adaptation to Land – – Cuticle development Xylem and phloem development Bryophytes have mycorrhizal fungi associated with their rhizoids (“false roots”) Rhizods anchor the plant in the ground, but they do not absorb water/nutrients for the plant. This means they are not real roots. Bryophytes are a pioneer species. Primary succession bare rock (after volcanic eruptions, nothing else was able to thrive in the area – except for moss) Secondary succession soil Liverworts – – Thallus: main structure Alteration of generations o Asexual reproduction (gemmae) o Sexual reproduction (antheridiophore + archegoniophore) § Antheridiophore is flat, circular & Frisbee-shaped & archegoniophore is umbrella-shaped § Sporophyte grows from fertilized egg in archegonium § Sporophyte produces spores via meiosis and releases them § Elaters help with release by twisting and turning due to humidity Hornworts – – – Thallus: main structure Asexual reproduction by fragmentation of thallus Sexual reproduction by antheridia & archegonia o The sporophyte has stomata Mosses – – – – Leaf-like blades 1 cell thick Cells contain several chloroplasts each Stem-like axis o Hydroids for water transport o Leptoids for nutrient transport Chlorenchyma – cells that contain chloroplasts Parenchyma – storage cells in a plant