1. Tree Architecture and Growth Part 1

2. Apical Growth Apical meristem = bud –Primary growth Preformed Indeterminant or sustained

5. Crown Form Excurrent Decurrent

6. Crown Architecture excurrent decurrent

7. Mechanisms Branch angle Geotropism Weight (gravity)

8. Lammas growth ‘unplanned’ bud break Aug 1 “Lammas Day”

12. Epinasty Epinastic control –angle and length of side branches –genetics and environment

15. Shade Side shade –Trees do not lose form Shade from above –high shade – low shade –becomes more diffuse –trees can lose epinastic control

17. Cross section

24. Live Crown Ratio

26. Shade Side shade –Trees do not lose form Shade from above –high shade – low shade –becomes more diffuse –trees can lose epinastic control

27. Multilayer vs. Monolayer Multilayer Monolayer

30. Horn, H.S. The adaptive geometry of trees. Princeton University Press, Princeton, NJ 144pp

34. Release Interaction of: – the environment (old new) –the silvical characteristics of the tree –tree condition

35. Tree Attributes Amount of foliage Amount of aphotosynthetic area Sun leaves– Shade leaves Epinastic control

36. Priorities for Photosynthate 1.Respiration 2.Foliage – Fine Roots 3.{Reproduction} 4.Primary Growth 5.Secondary Growth – Secondary Compounds

37. Lag in Response Not enough excess photosynthate to add foliage