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).
AMMONIA TOXICITY
NITRATE REDUCTASE REACTION NO NAD(P)H + H + + 2e - NO NAD(P) + + H 2 O
INDUCTION OF NITRATE REDUCTASE
NITRITE REDUCTASE REACTION NO Fd red + 8H + + 6e - NH Fd ox + 2 H 2 O PLANTS CAN ASSIMILATE NITRATE IN BOTH ROOTS AND SHOOTS PLANTS CAN ASSIMILATE NITRATE IN BOTH ROOTS AND SHOOTS
FORMS OF NITROGEN IN XYLEM SAP
CONVERSION OF AMMONIUM TO AMINO ACIDS REQUIRES TWO ENZYMES (GOGAT) (GS)
GDH PATHWAY
ASPARTATE FORMATION - TRANSAMINATION
ASPARAGINE SYNTHESIS
SUMMARY OF PROCESSES INVOLVED IN ASSIMILATION OF MINERAL NITROGEN (Leaf) “Photoassimilation”
BIOLOGICAL NITROGEN FIXATION
ANABAENA (CYANOBACTERIUM)
SOYBEAN ROOT NODULES
Development of infection thread
Root Nodule Development Leghemoglobin Isoflavonoids, betaines
NOD FACTORS PRODUCED BY BACTERIA ACT AS SIGNALS FOR SYMBIOSIS NOD FACTORS ARE LIPOCHITIN OLIGOSACCHARIDES
THE NITROGENASE REACTION (oxygen-sensitive) N e H ATP 2 NH 3 + H ADP + 16 P i
AMIDES (ASPARAGINE AND GLUTAMINE) AND UREIDES ARE THE TRANSPORTED FORMS OF NITROGEN IN LEGUMES UREIDES
EXAMPLES OF COORDINATION COMPLEXES
ELECTROSTATIC IONIC COMPLEXES
FERROCHELATASE REACTION
EXAMPLES OF OXYGENASE REACTIONS IN PLANTS