Calcium concentration in non ripping Rin and Normal Rutgers pericarp果皮 tomato tissue at different stages of fruit development(Poovaiah 1979) Soluble ca ug Calg dm Bound Ca, H g Calg Dm anthesis Rutgers Rutger 40 50 412 602 667 246 622 1357 291
Calcium concentration in non ripping Rin and Normal Rutgers pericarp果皮 tomato tissue at different stages of fruit development (Poovaiah 1979) Days after Soluble Ca, μg Ca/g DM Bound Ca, μg Ca/g DM anthesis rin Rutgers rin Rutgers 40 299 349 530 562 50 412 602 667 246 60 492 622 1357 291
Ca concentrations in various compartments of fully expended plants cells Apoplast 0. 1 mol/m3 Vacuole 1mol/m3 Cytosol 1mmol/ m3 ER 1 mol/ m3
Ca concentrations in various compartments of fully expended plants cells ◼ Apoplast 0.1 mol/m3 ◼ Vacuole 1mol/m3 ◼ Cytosol 1mmol/m3 ◼ ER 1 mol/m3
Biological functions Stability and integrity of biological membrane and tissues-cross links in cell Wa‖l 2. Plant growth, such as root tips, growing points of shoot and storage organs 3. Cell elongation and cell division 4. Calcium as second messenger-via secondary receptor,Ca/ modulin(钙调 and calmodulin-like proteins regulate numerous and complex processes Po| ination(授粉)
Biological functions 1. Stability and integrity of biological membrane and tissues-cross links in cell wall 2. Plant growth, such as root tips, growing points of shoot and storage organs 3. Cell elongation and cell division 4. Calcium as second messenger—via secondary receptor, Calmodulin (钙调 素)and calmodulin-like proteins, regulate numerous and complex processes. 5. Pollination(授粉）
The model of cam function 无活性酶X CaM CaM 活性酶X X酶与Ca2+·CaM 复合体结合而活化
The model of CaM function
Calcium deficiency and disorders Reduction in growth of meristematic tissues a Deformed and chlorotic and at a more advanced stage necrosis occurs The effected tissues become soft due to dissolution of the cell walls Brown substances( suberin) occur which accumulate in intracellular spaces and also in the vascular Not usual in soil but can occur in artificial medium
Calcium deficiency and disorders ◼ Reduction in growth of meristematic tissues ◼ Deformed and chlorotic and at a more advanced stage necrosis occurs ◼ The effected tissues become soft due to dissolution of the cell walls ◼ Brown substances (suberian) occur which accumulate in intracellular spaces and also in the vascular ◼ Not usual in soil but can occur in artificial medium