PlantKingdomCharacteristics

PlantKingdomCharacteristics - Plant Kingdom Characteristics...

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Plant Kingdom - Page 1 Plant Kingdom Characteristics Eukaryotic Photosynthetic Multicellular Sexually reproducing Life History involves an alternation of a haploid phase (Gametophyte) with a diploid phase (Sporophyte) Classification Artificially grouped into Nonvascular or Vascular Plants Non Vascular Plants – "Bryophytes" Disperse by spores Require H 2 O for sexual fertilization Small No vascular tissue Grow in clumps or masses Many capable of prolonged dehydration Most lack cuticle (protective surface layer) Three Divisions of Bryophytes Three Phyla Bryophyta – Mosses Hepatophyta – Liverworts Anthocerophyta – Hornworts Vascular Plants Vascular tissue Cutin or suberin on aerial parts Body an axis (stern) Large surface/volume ratio common Much survival value for terrestrial habitat with water deficit – increase in size by conducting tissue – especially xylem Many subdivision and classes Each textbook varies, but – patterns are visible as increase in complexity of body structure Vascularization (Microphylls vs megaphylls in leaves) Dispersal {spore (Single cell) vs seed} Sperm transport H 2 Ovs pollen grain)
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Plant Kingdom - Page 2 Lower (spore–dispersing) Vascular Plants Mostly predominant in fossil eras Important in coal–formation Fossil Phyla Rhyniophyta Zosterophyllophyta Trimerophytophyta Extant Phyla Lycophyta (Lycopodiophyta) – Ground Pines, Club Mosses and Quillwort Three Extant Classes (Orders) (Families) Lycopodiae (Lycopodiaes) (Lycopodiaceae) Selaginellae (Selaginellales) (Selaginellaceae) Isoetae (Isoetales) (Isoetaceae) Monilophyta or Pteridophyta Ferns (Pterophyta) Five Orders Ophioglossales – Eusporangiate Marattiales – Eusporangiate Filicales – Homosporous and Leptosporangiate Salviniales – Heterosporous and Leptosporangiate Marsileales – Heterosporous and Leptosporangiate Horsetails or Equisetum – One Order Equisetales (Sphenophyta) Whisk Ferns – One Order Psilotales (Psilotophyta)
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Plant Kingdom - Page 3 Higher (seed-dispersing) Vascular Plants Disperse by multicellular seeds o Embryo head–start in seed package Transport sperm in pollen grain o Freedom from H
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This document was uploaded on 01/06/2012.

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PlantKingdomCharacteristics - Plant Kingdom Characteristics...

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