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Developmental Plasticity and Symbiosis

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Presentation on theme: "Developmental Plasticity and Symbiosis"— Presentation transcript:

1 Developmental Plasticity and Symbiosis
Environment is not as bad as we thought Reaction Norm vs. Polyphenism Environmental regulation of phenotypes Learning

2 Nature vs Nurture?

3 Plasticity Phenotypic Developmental

4 Reaction Norm

5 Polyphenism

6 Dung Beetles and Ants: Diet-induced polyphenisms
Queen Ant vs Worker Ant Horned male Dung Beetles: Protector of the Female.

7 Diet and Gene regulation
DNA methylation viable-yellow of Agouti- transposon in cis-regulatory element.

8 Predator-induced Polyphenisms

9 Predator-induced Polyphenisms: Amphibians
More muscle mass in tail. Kairomones can make the tadpole more sensitive to environmental insults: fertilizers et al. Figure 17.6

10 Good Vibrations Fig. 17.7 Geronimo Try to find good model for this

11 Temperature and Sex

12 Temperature and Butterfly wings

13 Environment, Anxiety, and DNA methylation

14 Learning No division New Neurons Changing connections

15 Nervous system: Plasticity and Learning

16 Experience and vision Hubel and Wiesel (1960s)
Right eye occluded for 3 months Occurs within 4 to 6 weeks of birth

17 Life cycle and Polyphenisms
Diapause Larval Settlement

18 Spadefoot Toad

19 Symbiosis Parasitism Mutualism Commensalism

20 Developmental Symbiosis: passing on the help
Vertical transmission Horizontal transmission Wolbachia infection

21 Shedding light on symbiosis
Euprymna-Vibrio Light organ development and luminescence

22 Obligate mutualism Filariasis worm and Wolbachia
Spotted Salamander and Oophilia amblystomatis

23 Symbiosis in mammalian intestine

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