1 1 Carbohydrate and lipid metabolism Katerina Dadakova, Department of Biochemistry Figures adopted from Buchanan et al., Biochemistry & molecular biology of plants Carbohydrate and lipid metabolism Figure 13 C:\Users\Tom\Desktop\Prednaska\Sacharidy\Figure 13.10.jpg Sucrose synthesis UDP-glucose Carbohydrate and lipid metabolism Figure 13.21.jpg Figure 13.20.jpg Sucrose degradation Carbohydrate and lipid metabolism C:\Users\Tom\Desktop\Prednaska\Sacharidy\Figure 13.22.jpg Sucrose degradation Carbohydrate and lipid metabolism Figure 13.18.jpg Starch Starch, a polymer of glucose, is synthesized and stored in plastids. Starch synthesis protects plastids from osmotic disruption. Starch is organized into grains that grow by adding layers. Carbohydrate and lipid metabolism Starch synthesis Carbohydrate and lipid metabolism Figure 13.25.jpg Starch degradation Carbohydrate and lipid metabolism Pentose phosphate pathway – oxidative reactions Carbohydrate and lipid metabolism Glycolysis, the pentose phosphate pathway, and various biosynthetic pathways are interconnected in plants Pentose phosphate pathway – reversible reactions Carbohydrate and lipid metabolism Carbohydrate and lipid metabolism Box 13 Functions: •ATP production •Supply of reducing power •Funneling carbon for oxidative phosphorylation •Production of biosynthetic precursors Bypass reactions give plants metabolic flexibility Glycolysis Carbohydrate and lipid metabolism Respiration Carbohydrate and lipid metabolism Lipids Carbohydrate and lipid metabolism C:\Users\Tom\Desktop\Prednaska\Lipidy\Figure 10.1.jpg Lipid functions Carbohydrate and lipid metabolism The central role of acetyl-CoA in metabolism Carbohydrate and lipid metabolism C:\Users\Tom\Desktop\Prednaska\Lipidy\Figure 10.8.jpg Fatty acid synthesis Carbohydrate and lipid metabolism C:\Users\Tom\Desktop\Prednaska\Lipidy\Figure 10.26.jpg Fatty acid synthesis Carbohydrate and lipid metabolism Figure 10 Figure 10 Membrane lipids Carbohydrate and lipid metabolism Structural lipids Carbohydrate and lipid metabolism Cutin structure Figure 10 Storage lipids Carbohydrate and lipid metabolism Storage lipid mobilization Carbohydrate and lipid metabolism Genetic engineering of lipids Carbohydrate and lipid metabolism