1. Plant Developmental Responses

2. Phototropism positive

3. Gravitropism positive negative

4. Thigmotropism

5. Old Fig. 36.11 Sun rising over horizon MorningNoonAfternoon Heliotropism

6. Old Fig. 36.08c (c) Cross-sectional views Parenchyma cells retaining turgor Decrease of turgor in parenchyma cells Vascular tissue Pulvinus Leaflet Open Closed Nastic movements Mimosa

7. Venus fly trap (vulnerable)

9. (induction) Fig 6-2 Cell communication Signal transduction pathway eg: hormones

11. Auxin structure

12. The Darwins’ work on phototropism coleoptile of grass seedling ++--

13. Frits Went’s experiment

14. What’s happening?

15. effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision

17. effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision

18. Apical dominance (released)

19. effects a. promotes cell growth b. shoot phototropism c. root gravitropism d. apical dominance e. differentiation of vascular tissue f. prevents leaf abscision

20. used in agriculture/horticulture to: 1) promote (adventitious) rooting of cuttings 2) cause uniform flowering & fruit set 3) to give seedless fruit 4) synthetic auxins used as herbicides 5) promote growth & differentiation in tissue culture

21. Rooting cuttings

22. used in agriculture/horticulture to: 1) promote (adventitious) rooting of cuttings 2) cause uniform flowering & fruit set 3) to give seedless fruit 4) synthetic auxins used as herbicides 5) promote growth & differentiation in tissue culture

23. Plant tissue culture

24. Gibberellin structure Margaret Radley Bernard Phinney Eiichi Kurosawa

25. effects a. promotes stem growth b. induce flowering c. break dormancy in buds & seeds d. lower temperature threshold of growth e. increase yields f. increase size of fruit & distance between g. enhance starch digestion

26. Phinney’s dwarf corn

27. effects a. promotes stem growth b. induce flowering c. break dormancy in buds & seeds d. lower temperature threshold of growth e. increase yields f. increase size of fruit & distance between g. enhance starch digestion

28. (b) Do not post photos on Internet

29. effects a. promotes stem growth b. induce flowering c. break dormancy in buds & seeds d. lower temperature threshold of growth e. increase yields f. increase size of fruit & distance between g. enhance starch digestion

30. Fruit set (without seeds), size and spacing

31. effects a. promotes stem growth b. induce flowering c. break dormancy in buds & seeds d. lower temperature threshold of growth e. increase yields f. increase size of fruit & distance between g. enhance starch digestion

32. Seed germination (part of “malting” for making beer)

33. Cytokinin structure Carlos Miller Folke Skoog Related to adenine

34. effects a. promotes cell division b. cell enlargement c. tissue differentiation d. works with auxin in apical dominance e. chloroplast development f. stimulation of cotyledon growth g. delay of senescence h. used in plant tissue culture

35. Delay senescence

36. effects a. promotes cell division b. cell enlargement c. tissue differentiation d. works with auxin in apical dominance e. chloroplast development f. stimulation of cotyledon growth g. delay of senescence h. used in plant tissue culture

37. Plant tissue culture

38. structure effects a. promotes cell growth b. ripening in some fruit c. leaves to abscise d. chlorophyll to bleach e. flower pigments to fade

39. Abscisic acid structure effects a. inhibits cell growth b. make buds & seeds dormant c. stomates to close Frederick Addicott

40. Brassinosteroids discovered in 1970 (J Mitchell & others) involved in: cell division, cell elongation, vascular development, seed germination, light responses

41. Day-neutral plant grafted to long-day plant Both plants flower Long-day induction (short night) Graft “Florigen”

42. Photoperiodism (long-night) (short-night) Also: intermediate- day plants day-neutral plants

43. Phytochrome Proteins that change shape

44. Order of red & far-red illumination affects lettuce seed germination

45. Etiolation

46. Cryptochrome : a blue light sensor (protein structure) Blue light

47. Circadian rhythms eg: sleep movements

48. Necrotic lesions

50. Jasmonic acid

51. salicylic acid methyl-salicylate