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bisc 101 - plant biology - structure, function, transportation, reproduction

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Biological Sciences
BISC 101
Zamir Punja

BISC 101Plant Biology Onion layersfleshy leavesINTRO TO PLANT BIOLOGYCHAPTER 35 PLANTBottom of onion where sprouts occurstem plate cut Importance of Plantsit off and you start to crySTRUCTUREFUNCTION Health of ecosystems and the planet Brussels sproutsauxiliary buds baby cabbage little Plant Cells Used for foodbud1 Plant vs Animal Cells Increase biodiversity on planet earth3 Shoot Growth Presence of chloroplasts in plant cells Widespread use in medicine forestry industryhomeGrowth may be continuous or stop after one year Plant cells have rigid cell wall woodbuilding economic prosperity INDETERMINATE Keep growing Plant cells have central vacuole stores wateroilHealth of Ecosystems and the Planet DETERMINATE Stops growing Fig 68 overview of plant cell1 Photosynthesis ANNUALS Only grow for one year flowers veggies2 Cell Wall StructureLIGHT ENERGY sun CO2 is taken in and made into PERENNIALS Grow for many years tree grass Several layerssugars and O2 DECIDUOUS Bushy trees maple apple CELLULOSE Major component in cell wall mostCARBON FIXATION Conversion of CO2 to sugars CONIFER Spike trees evergreen apical dominance abundant cell in nature hard todigest Fossil fuels and various other carbonrelated material is tree apex suppresses side shoots which accounts forFig 58source of CO2spike blades Secondary cell walls have ligninhemicellulose Global warming is due tohigh CO2 levelsTisues Types and MeristemsGrowth Lignin provides structural support Production of O2 source is photosynthesis critical for 1 MeristematicMonocotsDicotsenvironmentcontributes to ozone layer actively diving1Characteristics of Plants Concern Depletion of ozone layer solutionisto addfound in growing points epical buds root tipsii Classifcationmore greens to worldpreserve plantresults in continued grow of planttree Plant kingdomgrowthenvironments forestsFig 3511 Gymnosperms conifer species2 Environment2 Dermal tissue Angiosperm species evergreen flowering plantsStability due to release of O2 in ozone found outside of plant outer most layer250000 species Cycling of nutrients in soil protective role like skin From flowering plants there are subgroupsPrevent soil erosion eg Epidermis outside layer of cell which usually has MONOCOTS AND DICOTS akaeudictors3 Ecologyprotective role Fig 313 Foodhabitat for birds mammals insects3 Ground tissueii Monocots Plants for Food three types of ground tissue 75000 species1 Food Production AKA Agriculturei PARENCHYMA most commonly found cell thin cell One cotyledon Cultivationof plants on a large scale for foodwalls large vacuole store food strarch like
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