PLSC 206

  1. abscission
    Loss of leaves, Two layers formed simultaneiously
  2. adnation
    Fusion of parts with other sets, unlike parts fuse
  3. Alternate Leaves
    All leaves usually in one plane; one per node
  4. Anther
    Sac like upper part of stamen, contains pollen in sacs
  5. Anthesis
    Ruptur of anthers, release of pollen grains
  6. anthocyanin
  7. Antipodal
    3 nuclei at chalazal end
  8. Apical Bud
    Shoot apical meristem coverd by expanding leaves
  9. Auricles
    Lateral; from side of blade and sheath junction, may encircle or clasp culm
  10. Bracts
    modified leaf at the base of the flower
  11. Bulb
    Compressed stem having very short internodes
  12. Calyx
    Whorl of Sepals, lower most flower parts. Flattened, often green, but may not be
  13. Carpel
    Female reproductive organs of plant
  14. Catkin
    A spike inflorescence with sessil unisexual flowers; with a perianth
  15. Chlorophyll
  16. Collar
    Junction of sheath and blade
  17. Complete Flower
    All four parts present
  18. Compound Leaf
    blade divided into leaflets arranged on a rachis(extention of petiole)
  19. Corm
    Stem; fleshy, short and thick, leaves scaley and dry
  20. Corolla
    Whorl of Petals, Flattened usually colors other than green-frequestly showiest part of flowers
  21. Cross-Pollenation
    Pollen to flowers on different plants
  22. Crown
    A persistant basal stem with short internodes
  23. Culm
    Grass stems, elongated slowly until flowering, then all branches elongate more or less equally
  24. Cuticle
    Surface layer makes epidermis more or less impermeable to gases including water vapor
  25. Cutin
    Waxy substance over outter surface, may penetrate vertically
  26. Determinate
    Central apical meristem differienciates as flowers
  27. Diffuse Porous
    Large vessels produced thoughout the grouth ring
  28. Dioecious
    Staminate and pistillate flowers on different plants
  29. Diploid
    (2n) Two sets of chromosomes, normal condition of vegetative(somotic) cells
  30. Double Fertilization
    Pollen tube penetrates integuments, end wall breaks down, sperm nuclei enter embryo sac
  31. Egg Nucleus
    One of three at integument end
  32. Stem Epidermis
    Outer layer covered in cutin (wax)
  33. Epigynous
    Flowers have inferior ovary, flower parts attach at top of ovary
  34. Flower Induction
    End of the vegetative growth on a stem. Apical meristem differenciates as reproductive tissue (flowers)
  35. Gametophyte Generation
    Mitosis of haploid nuclei produces gametiphyte, which produces gametes
  36. Guard Cells
    Oval; Kidney shaped bulbiform
  37. Haploid
    (n) One set of chromosomes, found in gametes and gametophyte stages
  38. Hydathodes
    Vascular opening at leaf margin, source of guttation
  39. Hypogynous
    Flowers have superior ovaries, other flower parts attach to receptacle below the ovary
  40. Imperfect flower
    Lacks gynoecium or androecium
  41. Incomplete Flower
    One or more parts missing
  42. Indeterminate
    Axillary buds differenciate first
  43. Inflorescence
    An axis bearing multiple flowers or flower cluster
  44. Intercalary Meristem
    Temporary region of cell division near base of internodes
  45. Internode
    Stem between two nodes. Zone of cell elongation
  46. Lamina (Blade)
    Thin, flattened part of leaf
  47. Ligule
    Outgrowth along lamina/sheath junction on upper side of collar
  48. Meiosis
    Two succesive cell divisions which reduce the chromosome number of daughter nuclei to haploid. Genetic segregation occurs
  49. Mesophyll
    Parenchyma between epidermises
  50. Mitosis
    Cell division in which chromosomes duplicate, then divide to produce two daughter nuclei like mother nuclei
  51. Monoecious
    Have both stamens and pistils on same plant
  52. Node
    Part of stem where leaves and buds arise
  53. Opposite
    Two leaves per node; planes alternate
  54. Ovary
    Basal, enlarged portion of pistil in which seeds are borne
  55. Pallisade Parenchyma
    Cells usually elongated with long axis at right angles on leaf surface
  56. Palmate
    Several equal size veins diverge (fan out) from petiole or stem
  57. Panicle
    A cluster of racemes, distinctly or multiply branched
  58. Parallel
    Several equally sized veins, usually coming from several stem vascular bundles
  59. Pedicel
    Individual flower stalk in an inflorescence
  60. Peduncle
    Stalk or stem of solitary flower or inflorescences
  61. Perfect Flower
    Androecium and gynoecium present
  62. Perianth
    Collective name for Corolla or Calyx
  63. Petiole
    Stalk that attaches leaf to stem
  64. Pinnate
    Mid-vein; central vein with lateral branches, several layers of branching
  65. Pistil
    • Can be Simple (one carpel) or Compound (2 or more
    • fused carpels). 3 parts: Stigma, Style, Ovary
  66. Pistillate
    Lacks androecium; pistils only
  67. Stem Pith
    Parenchyma in center of stem (both monocots and dicots)
  68. Pollenation
    Transfer of pollen from anther to stigma
  69. Protective Layer
    Where cells become suberized to prevent loss of water and nutients
  70. Receptacle
    An enlarged tip of the stem on which flower parts are born
  71. Rhizome
    Horizontal below ground stem. Sometimes parennial- forms adventitious roots at nodes
  72. Rosette (Basal)
    Extended leaf growth with limited internode elongation (lettuce)
  73. Self- Pollenation
    Pollen to flowers on same plant (or within same flower)
  74. Seperation layer
    Where middle lamella of the cell wall degrades
  75. Sessile
    Leaf blade attaches directly to stem; no petiole
  76. Sheath
    Lower tubular part of the leaf that surrounds a stem more or less completely, as in grass
  77. Shoot
    Above ground portions of the plant; leaves, stems, flowers, etc..
  78. Simple Leaf
    One continious blade
  79. Spike
    Flowers sessile, no pedicels
  80. Spines
    Reduced sharpened branches that protect against herbivores
  81. Spongy Mesophyll (parenchyma)
    Equal (multi) sided cells- large, fewer chloroplasts than palisade
  82. Sporophyte Generation
    Ends when meiosis produces haploid spores
  83. Stamen
    Consist of filament and anthor
  84. Staminate
    Lacks gynoecium; stamens only
  85. Stigma
    Uppermost portion of pistil, to which pollen adheres
  86. Stipules
    Appendage, often leaf-like at base of petiole, or on node
  87. Stolon
    Horizonatal above ground stem, forms adventitious roots at nodes or soil surface
  88. Stomate
    Openings in epidermis
  89. Style
    Slender column of tissue that connects stigma to ovary
  90. Synergids
    Other two nuclei with egg nucleus
  91. Tendrils
    Coiling leaf or stem tissue that provides support (vines)
  92. Tuber
    Thich flesh stem formed at end of rhizome
  93. Umbel
    Inflorescence where pedicels arise from a common point and are equal length
  94. Union
    Fusion of parts within a whorl
  95. Vascular Bundles
    Xylem and Phloem
  96. Veins
    Xylem and Phloem; a vascular bundle in leaf blades, usually no cambium
  97. Whorled
    3 or more leaves at one node
Card Set
PLSC 206