Plant Nutrition and transportReal Quiz!ObjectivesFig 32.1AUptake and transport of plant nutrientsSolute uptake in the rootsProperties of waterTranspirationFig 32.4Sugar transportSugar transportSugar sinkAphidsPop QuizPlant Nutrition and transportChapter 32Real Quiz!• Closed book, 10 minutes, 10 pointsDraw a GENERAL diagram that describes how a plant undergoes alternation of generations. In your diagram include all the different phases that the plants go through and the processes that lead from one phase to another. Indicate which phases have the full chromosome number, and which have half the chromosome number.Objectives• Identify the needs of plants and the entry points of materialsFig 32.1AUptake and transport of plant nutrients•Co2 enters plants through the leaves• Water, minerals and some O2 enters through from the soil through the roots• All other materials are produced through mixtures of these• Energy is obtained from the respiration of sugars. Leaves produce O2 for this , roots absorb it from the soilSolute uptake in the rootsFig 32.2BSolute uptake in the roots• Roots have large surface area• Mycorrhizal fungal interactions supply nutrients and water to the plant• Substances enter roots both intracellularlly and extracellularly, control over substances occurs at the cell membrane• Intracellular (root hair membrane-plasmodesmata-cortex cells, endodermal cells- xylem)• Extracellular (porous cell walls,around casparian strips, to xylemProperties of waterWater molecules stick to one Another (cohesion) and other s(adhesion)Water is a polar moleculeFig 2.9Fig 2.10TranspirationFig 32.3Transpiration• Water – cohesion, diffusion, osmosis• How do plants lift water from the roots to the leaves• Root cell membranes pump solutes into the xylem, then water follows• Transpiration – adhesion-cohesion – Evaporation of water from leaves thru stomata– Cohesion of water molecules in the xylem– Adhesion of water to celluloseFig 32.4Transpiration is controlled by stomSugar transportFig 32.5BSugar transport• Sugars are made at “sugar sources”• Sugars travel to and are used at “sugar sinks”• Osmosis is responsible for generating pressure differences that move the sugar.•Proof ! –Aphids!Sugar sinkAphidsFig 32.6BFig 32.8Pop Quiz•What part of the leaf releases gasses and water vapor?•What are the two pathways by which water enters