Thursday Lecture – Legumes, continued; Leaf, Stem and Root Crops

1. Thursday Lecture – Legumes, continued; Leaf, Stem and Root Crops Reading: Textbook, Chapter 7

2. Roundup Ready Wheat • The Latest Battlefield in the “Biotech Wars”: • Roundup Ready Crops: corn, soybeans, cotton • None of these have major use in human consumption • Roundup Ready Wheat: produced and marketed by Monsanto • major use of wheat = human food • major export crop ( Japan, Europe) • Worry: if any farmers grown GM Wheat, some importers (Japan) will ban all wheat from U.S.  all farmers will lose this market

3. Quiz

4. Quiz • Name on Old World legume and a New World legume • Where exactly in a legume plant does nitrogen fixation occur. Be specific.

5. New World Beans – 1. Lima Beans Phaeolus lunata – Mexico to Peru, independently domesticated in the two areas. Mostly used dry. Wild plants and some cultivars contain cyanogenic glycosides – release toxic cyanide (cooking destroys compounds)

6. New World Beans – 2. Common Beans Phaseolus vulgaris – source of many types Another independent domesticate in Mexico and South America

7. New World Beans – 2. Common Beans Phaseolus vulgaris – source of many types Another independent domesticate in Mexico and South America

8. Beans, Beans, Beans Selection for the variations in the seed in color and size have produced a bewildering number of variants, several of which have widespread use in our country. Kidney bean Black bean Pinto bean

9. Another New World Legume - Peanut Arachis hypogaea – peanut, ground nut, goober central South America

10. The Underground Crop

11. Forage Legumes – Sitting in the Clover Alfalfa – Medicago sativa - king of forage crops – associated with horse husbandry

12. Forage Legumes – Sitting in the Clover Alfalfa – Medicago sativa - king of forage crops – associated with horse husbandry Clovers – Trifolium Lespedeza Sweet Clovers - Melilotus

13. Coleus stem apex – from side Leaf Primordium Apical Meristem Procambium Bud Primordium Ground Meristem Cell Elongation and Differentiation Coleus Shoot Apex See Text Fig. 7.4, p. 157

14. Coleus stem apex – from top See Text Fig. 7.4, p. 157

15. Cole Crops – Cabbage and its Relatives See Fig. 7.13, p. 168

16. Brassica – The Pungent Genus See Fig. 7.12, p. 167 Brassicaceae = Cruciferae Biennial Habit

17. Cole Crops – Cabbage Structure See Fig. 7.15, p. 169 Leaf Lateral bud Stem

18. Cole Crops – Stems and Axillary Buds See Fig. 7.13, p. 168 Brussels sprouts kohlrabi

19. Cole Crops – Modified Inflorescences See Fig. 7.13, p. 168 Cauliflower Broccoli

20. Turnips – Brassica campestris See Fig. 7.16, p. 170

21. See Fig. 7.18, p. 172 Lettuce Lactuca sativa – Asteraceae (Compositae)

22. Cichorium – Endive & Chicory

23. Wild Chicory

24. See Fig. 7.24, p. 176 Artichoke Cynara scolymus - Asteraceae

25. Celery – Petioles in your Soup See Fig. 7.19, p. 173

26. Celeriac – Celery Root See Fig. 7.20, p. 173

27. Carrots

28. Carrots Gone Wild - Queen Anne’s Lace See Fig. 7.21, p. 174 Apiaceae = Umbelliferae

29. Baby carrots – a product of the “Soccer Mom” age Baby carrots are produced by using specially bred forms that produce a long, thin storage root. The roots are carefully selected to eliminate discolored or malformed ones, and then are sliced into short pieces (2-3 inches). The pieces are further checked for color (they must have no hint of green) and are sent through a lathe device that smoothes the ends. The final product is ready to eat in a convenient form.

30. Asparagus – Eat Your Lilies See Fig. 7.25, p. 177

31. Onions – Allium cepa See Fig. 7.27, p. 179

32. Leeks – Another Allium See Fig. 7.27, p. 179

33. Bulbs Bulbs Succulent Storage Leaves Stem Adventitious Roots Big buds on short stems

34. Corms Corms: short fat underground stems

35. Rhizomes Rhizomes: simple underground stems Hydrocotyle Petioles reach above the sand Nodes Apex of Rhizome Adventitious Roots

36. Tubers Tubers: swollen ends of rhizomes

37. Corm - Crocus STEMS Bulb - onion Tuber - potato

38. Irish Potato Solanum tuberosum

39. The Amazing Spud - The potato is a short duration crop that produces a large amount of calories in a short period of time - The potato produces more protein and calories per unit area per unit time and per unit of water than any other major plant food. - The ratio of protein to calories, the quality of the protein and the high levels of vitamins and minerals are assets greatly needed in many countries.

40. Potatoes – South American Staple

41. Potatoes Travel to Europe Frederick the Great encouraging peasants to grow more potatoes Vincent van Gogh painting: “The potato eaters” (Belgium)

42. Potato Blight Healthy leaf Potato Blight: Phytophthora infestans (fungus) Potatoes damaged by blight Blighted leaf

43. The Irish Potato Blight Ireland – potato became staple crop in 1800s functionally monoculture – political & cultural considerations 1840s – potato blight hit: population 8 million  6 million - 1 million people died; 1.5 million people immigrated to Australia & U.S.A.

44. Potato Culture – Increasing Mechanization Holland Potato Farms 100 years apart 1870 1970

45. Improving Potato Yields Despite appearances, not yet a priority for the Green Revolution

46. Tuesday Lecture – Stem and Root Crops Reading: Textbook, Chapter 7