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PP 508 PHYSIOLOGY OF PLANT MINERAL NUTRITION                                                                                 (3L+1P) II

Objective
  To impart knowledge about physiological and molecular aspects of mineral nutrition in plants.

Theory

UNIT I
  History, definition and classification of mineral nutrients, mineral content of plant tissues. Pathway of  nutrient movement from external solution into the roots. Structure and composition of membranes. Driving forces for the transport of nutrients across the membrane.

UNIT II
  Characteristics of ion uptake by the roots. Interaction between the ions, radial transport across the roots, ion uptake along the roots, mechanisms of ion release into the xylem, xylem transport, phloem transport, nutrient cycling between shoots and roots, remobilization of mineral nutrients.

UNIT III
  Uptake of gases through stomata, uptake of solutes, foliar application of mineral nutrients, leaching of mineral elements from leaves. Availability in soil/atmosphere and crop requirements, nutrient release and immobilization, nitrification and denitrification.

UNIT IV
  Translocation and metabolic functions of macro and micro elements, optimum requirement, visible morphological and anatomical effects, cellular and sub-cellular effects, effect on metabolism, beneficial elements.

UNIT V
  Growth and morphology of roots, architecture, allelopathy, variation in nutrient use efficiency and in nutrient requirements, nutrient toxicity response

UNIT VI
  Ionomics and transporters, screening and selection techniques, molecular regulation and breeding for improved mineral ion transport/uptake and nutrient use efficiency.

Practicals
  Diagnosis by visible symptoms, plant analysis, histochemical and biochemical methods, plant analysis vs. soil analysis, treatment of disorders, importance of root characteristics.

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