PLANT DIVERSITY. SUPERGROUP ARCHAEPLASTIDA – KINGDOM PLANTS.
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Transcript of PLANT DIVERSITY. SUPERGROUP ARCHAEPLASTIDA – KINGDOM PLANTS.
![Page 1: PLANT DIVERSITY. SUPERGROUP ARCHAEPLASTIDA – KINGDOM PLANTS.](https://reader036.fdocuments.us/reader036/viewer/2022081504/5697c00e1a28abf838cca088/html5/thumbnails/1.jpg)
PLANT DIVERSITY
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SUPERGROUP ARCHAEPLASTIDA – KINGDOM PLANTS
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SPORE
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GAMETOPHYTE
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GAMETOPHYTE SHEDDING SPORE COAT
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MATURE GAMETOPHYTE (HERMAPHRODITIC)
Antheridia (male)
Archegonia (female)
Rhizoids
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EGG IN ARCHEGONIUM
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FLAGELLATED SPERM COMING OUT OF ANTHERIDIUM
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Colonization of Land – Adaptive Radiation
• Limitations for terrestrial life– Water availability– Dispersal mechanisms– Maintaining genetic diversity
• Result = great diversity of land plants
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Vascular Tissue• Long tubes: transport water
minerals and nutrients. – Phloem: sugars/nutrients from
leaves– Xylem: wter and minerals from
roots• Made of special cells called tracheid
cells• Tracheophytes
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Alternation of generations
Haploid generation (1n)
• Gametophyte• Haploid gametes fuse
to form diploid zygote
– Diploid generation (2n)• Sporophyte• Produce haploid spores
through meiosis
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Moss and Liverwort Life Cycle
• Gametophyte is dominant form• Lack of vascular tissue
– Low to the ground
• Swimming sperm (dependent on water)
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Fern Life Cycle
• Sporophyte is dominant form• Vascular tissue present
– Can grow taller
• Swimming sperm (dependent on water)
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Pine Life Cycle
• Sporophyte is dominant form• Vascular tissue present• Dispersal ability
– Sperm in pollen– Seeds
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Angiosperm Life Cycle
• Sporophyte is dominant form• Vascular tissue present• Flowers
– Pollination (dispersal and genetic variability)
– Double fertilization
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TODAY’S LAB
• Fill out Table 5.2 with plant characteristics – study for quiz
• Lab Report due next week: fern lifecycle
• Plant presentations
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Orchids
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Horse Tails