outline 15+16

outline 15+16 - 2. function: storage, secretion,...

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Tejas Patel Lectures 15+16 Outline 11/2/11 Plant Reproduction I. Key Features A) alternation of generations 1. sporophyte generation (2n) dominant B) heterosporous 1. microspores → male; megaspores → female C) sexual reproduction 1. occurs in flowers D) double fertilization II. Life Cycle A) gametophyte (male + female) → pollination/cross-pollination → double fertilization → seed → fruit III. Asexual Reproduction A) plant produces clone of itself 1. 1 parent; no gametes; offspring genetically identical to parent B) modified roots, stems, and leaves; apomixis Plant Anatomy I. Plant Cell A) nucleus + organelles; central vacuole; plastids; cell wall II. Plant Body A) 2 systems: root → below ground; stem → above ground B) cells, tissues, and organs 1. cell – basic functional unit of plant body 2. tissues – groups of cells that are associated and function together 3. organs – composed of all three tissue systems III. Ground Tissue System A) parenchyma cells 1. characteristics: thin and flexible, alive at maturity, least specialized
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Unformatted text preview: 2. function: storage, secretion, photosynthesis for those with chloroplasts B) collenchyma cells 1. characteristics: elongated, alive at maturity, flexible, no lignin, support w/o restraining growth 2. function: structural, form strands or cylinders C) sclerenchyma cells 1. characteristics: thick, dead at maturity 2. function: structural IV. Vascular Tissue System A) characteristics: embedded in ground tissue B) xylum: transports water, structural support C) phloem: structural support V. Dermal Tissue System A) characteristics: protective covering 1. 2 complex tissues: epidermis, periderm B) herbaceous plant: epidermal cells, stomata, trichomes, no periderm C) woody plant: periderm VI. Plant Growth A) cell division: cells divide in areas called meristems B) meristems: composed of cells whose primary function is to form new cells C) primary growth: increase in stem and root length D) secondary growth: increase in girth (width) of the plant...
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This note was uploaded on 11/30/2011 for the course BIO 119:101 taught by Professor Martin during the Fall '08 term at Rutgers.

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