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Lecture notes

Diversity of Life Term 1 Notes - Plants

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Summary of lecture notes from the Diversity of Life module (term 1). Notes include the topics Plant evolution in action and Evolution of land plants. Notes are very clear and contain colourful images and diagrams.

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  • April 13, 2017
  • 42
  • 2015/2016
  • Lecture notes
  • Unknown
  • All classes

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Diversity of Life Notes – Plant evolution in action and Evolution of land plants:

Lecture 1 – An introduction to Angiosperm Diversity:

 Amborella trichopoda – earliest angiosperm. Simple structure without
properly defined xylem, has tracheids instead.
 Grasses-
 Magnolia grandiflora – early angiosperm animal relationships, beetle
pollination, food reward for the pollinator
 Victoria amazonica – member of water lily family, flower opens and attracts
beetles, beetles gain food reward, a social environment and a thermal
reward, long flowering season, but short life of each flower.
 Leucadendron uliginosum – wind and beetle pollination, ancient group of
eudicots, seeds will not germinate unless there is a fire (triggered into
germination by chemicals in smoke).
 Gorteria diffusa – mimickery of beetles, beetle pollination, flowers odourless,
rarely offering nectar
 Gazania rigida –
 Ursinia calenduliflora – beetles see in ultraviolet so can’t see the colours,
head to the darkest place
 Helicodericeros muscivorus – fly pollination, eggs laid around mouth of
flower
 Amorphophallus rivieri – mimickery,
 Hoodia gordonii – milkweed plant, attractive due to smell
 Stapelia variegata –
 Erica densifolia – narrow flower tubes,
 Galanthus nivalis – bee pollination, niche operator as flower very early in the
season
 Paeonia peregrine – in cold weather, the petals close to protect pollinators
and delicate sexual structures
 Pleione bulbocodioides -
 Echium pininana – flowers build up electrostatic field and this can be picked
up by the bee, bee can sense the strength of the field
 Oenothera biennis – pollination by vespertine
 Strelitzia reginae – bird pollination

Lecture 2 – Adaptations to seasonally dry environments:

New World Cacti:

 Echinocactus grusonii: Cactasi is a huge plant family of angiosperms. Apart
from one species, all are found in the Americas. All these habitats have a
period of aridity.
 Absence of leaves.
 Small surface area to volume ratio.

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