Chapter 2 Water metabolism
Chapter 2 Water Metabolism
Plant Water Relations For every g of organic matter made by the plant, approximately 500 g of water is transpired by the plant Leaves loose up to x 100%of their water/hr
➢ For every g of organic matter made by the plant, approximately 500 g of water is transpired by the plant. ➢ Leaves loose up to ~ 100% of their water/hr. Plant Water Relations
1500 E 1000 500 Taiz Zeiger 2002. used with ⊥ permission 0.5 10 15 2.0 Annual precipitation(m)
Amounts of water in plants >Living plants=w80 to 95%water >Vegetables=- 85 to 95% water Sapwood =- 35 to 75% water Seeds =s 5 to 15% water
➢Living plants =~ 80 to 95% water. ➢Vegetables =~ 85 to 95% water ➢ Sapwood =~ 35 to 75% water ➢ Seeds =~ 5 to 15% water Amounts of water in plants
Roles of water in plant cells Medium for biochemical reactions Physical support Turgor pressure Thermal requlation Transport of water, nutrients and other molecules
Roles of Water in Plant cells ➢ Medium for biochemical reactions. ➢ Physical support. • Turgor pressure. ➢ Thermal regulation. ➢ Transport of water, nutrients and other molecules