2. ASSIMILATION OF MINERAL NUTRIENTS NUTRIENT ASSIMILATION: THE INCORPORATION OF MINERAL NUTRIENTS INTO ORGANIC COMPOUNDS. ASSIMILATION OF SOME NUTRIENTS—PARTICULARLY NITROGEN AND SULFUR—REQUIRES A COMPLEX SERIES OF BIOCHEMICAL REACTIONS. ASSIMILATION OF OTHER NUTRIENTS INVOLVES THE FORMATION OF COMPLEXES WITH ORGANIC COMPOUNDS (e.g. Mg 2+ ASSOCIATION WITH CHLOROPHYLL).

5. AMMONIA TOXICITY

6. NITRATE REDUCTASE REACTION NO 3 - + NAD(P)H + H + + 2e -  NO 2 - + NAD(P) + + H 2 O

7. INDUCTION OF NITRATE REDUCTASE

8. NITRITE REDUCTASE REACTION NO 2 - + 6Fd red + 8H + + 6e -  NH 4 + + 6Fd ox + 2 H 2 O PLANTS CAN ASSIMILATE NITRATE IN BOTH ROOTS AND SHOOTS PLANTS CAN ASSIMILATE NITRATE IN BOTH ROOTS AND SHOOTS

9. FORMS OF NITROGEN IN XYLEM SAP

10. CONVERSION OF AMMONIUM TO AMINO ACIDS REQUIRES TWO ENZYMES (GOGAT) (GS)

11. GDH PATHWAY

12. ASPARTATE FORMATION - TRANSAMINATION

13. ASPARAGINE SYNTHESIS

14. SUMMARY OF PROCESSES INVOLVED IN ASSIMILATION OF MINERAL NITROGEN (Leaf) “Photoassimilation”

15. BIOLOGICAL NITROGEN FIXATION

17. ANABAENA (CYANOBACTERIUM)

18. SOYBEAN ROOT NODULES

19. Development of infection thread

22. Root Nodule Development Leghemoglobin Isoflavonoids, betaines

23. NOD FACTORS PRODUCED BY BACTERIA ACT AS SIGNALS FOR SYMBIOSIS NOD FACTORS ARE LIPOCHITIN OLIGOSACCHARIDES

24. THE NITROGENASE REACTION (oxygen-sensitive) N 2 + 8 e - + 8 H + + 16 ATP  2 NH 3 + H 2 + 16 ADP + 16 P i

27. AMIDES (ASPARAGINE AND GLUTAMINE) AND UREIDES ARE THE TRANSPORTED FORMS OF NITROGEN IN LEGUMES UREIDES

29. EXAMPLES OF COORDINATION COMPLEXES

31. ELECTROSTATIC IONIC COMPLEXES

32. FERROCHELATASE REACTION

33. EXAMPLES OF OXYGENASE REACTIONS IN PLANTS