Thursday, October 15, 2009

Bot. 325 PLANT PHYSIOLOGY II (2+3): 3

Bot. 325 PLANT PHYSIOLOGY II (2+3): 3
Mineral nutrition in plants: Introduction, mineral absorption, membrane equilibrium (Donan equilibrium). Mass flow: active absorption and carrier concept. Essential and beneficial elements: macro-elements, microelements, available forms, functions and deficiency symptoms. Toxic effects of mineral elements: mineral antagonism, salt requirement, Translocation in plants: Introduction- principal substances trans-located- xylem translocation- phloem translocation. Transpiration- cohesion theory- root pressure. Mechanisms: The pressure-flow hypothesis- The cytoplasmic streaming hypothesis- The activated diffusion hypothesis.

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