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Plant And  Structures
 

Plant And Structures

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    Plant And  Structures Plant And Structures Presentation Transcript

    • Plant Structure By: Geonyzl L. Alviola
    • Plant organs
      • The major organs of vascular plants are:
      • - Roots
      • - Shoots
    • Roots
      • Present in all vascular plants
      • Typically function as anchorage and absorption of water and minerals
      • Consist of apical meristem that give rise to:
      • - root cap
      • - root hairs
      • - lateral roots
      • - central endodermis vascular
    •  
    • Shoot
      • Consist of apical meristems that would give rise to leaves, stem and other organs.
    • Stem
      • A cylindrical organ that bears the leaves
      • Typically function for conduction of water and minerals
      • Support and elevation of some leaves and reproductive structures
    • Leaf
      • Organ of the shoot that is dorsiventrally flattened
      • Usually function for :
      • - transpiration
      • - photosynthesis
      • Derived from leaf primordia
      • Vascular plants, have many vascular bundles while mosses, the gametophytic leaves contains costa.
    • Buds
      • Are immature shoot system
      • Located in the axils of the leaves
      • But may grow lateral vegetative branches
      • Or reprodutive structure
    • Plant reproductive organs
      • In non-vascular plants
      • - sporangium – the basic spore-forming
    • Plant reproductive organs
      • In heterosporous plants
      • - male (microsporangium)‏
      • - female (megasporangium)‏
      • CAPSULE, sprorangium of liverwort, mosses and hornworts
      • CONE or strobilus
    • Plant reproductive organs
      • Flower for angiosperms, bearing sporophylls:
      • - stamen and carpels
      • Ovule is a megasporangium enveloped by one or more protective integuments.
      • Seed. - a mature ovule
    • Plant Habit
      • Refers to the general form of a plant:
      • 1. herb
      • 2. liana
      • 3. vine
      • 4. shrub
      • 5. tree
    • Definition of terms
      • Annual – a plant that completes its cycle in one year (during which time it germinates, flowers, produces seeds and dies)‏
      • example : sunflower
      • Biennial – a plant that requires two growing seasons to complete its cycle. During the first year it builds up food reserves, which are used during the second year in the production of flowers and seeds
        • example : carrot
      • Perennial – a plant that lives for a number of years. Woody have permanent aerial form which continue to grow year after year.
      • Examples : Mango tree, Talisay tree
      • Ephemeral – an annual plant that complete its life cycle in less than one growing season.
      • Examples: weeds , desert plants (completing their life cycle in a short period following rain)‏
    • Herb
      • A plant in which any aboveground shoots, whether vegetative or reproductive.
      • Short in height
    • Vine
      • A plant with weak, elongated stems
      • Generally supported by means of scrambling, twining, tendrils or roots.
        • It may either be annual or perennial
        • Herbaceous or woody
    • Liana
      • A vine that is perennial and woody
    • Shrub
      • A perennial, woody plant with several main stems arising at ground level.
      • distinguished from a tree by its multiple stems and lower height
    • Tree
      • Generally tall perennial plants
      • Having one main stem arising at ground level
    • Plant Habit
      • Refers to the general environment where the plant is growing :
      • - terrestrial - emersed
      • - aquatic - floating
      • - epiphytic - emergent
      • - saxicolous
    • Terrestrial
    • Aquatic (emersed)‏
      • Occuring underwater (the whole body)‏
    • Aquatic (Floating)‏
      • Occuring at the water surface.
      Duck weed
    • Aquatic (Emergent)‏
      • Having roots or stems anchored to the substrate under water and aerial shoots growing above water.
    • cattail
    • Epiphytic
      • Growing on another plant