ORGAN SYSTEM OF PLANTS

• Absorption - takes place in the root hair
• Root hair - also absorb ions or mineral salts from the soil
• • As water moves from the soil into root hair cells by osmosis, pressure inside these cells build.
• XYLEM - carry water and dissolved materials up from the roots
• PHLOEM - carry food and glucose from the leaves to all the other parts of the plant, including the roots
• When total water potential is lower outside, the plant wilts
• SYMPLAST

  • sym - means same/shared
• SYMPLAST - Shared cytoplasm
• SYMPLAST

  • Shared Cytoplasm
  • Water and minerals move through plasmodesmata
• PLASMODESMATA - cell wall chanels that allow response to systemic signaling.
• APOPLAST - Outside of the cell
• APOPLAST

  • Water travels through the porous cell walls.
  • Outside of the cell
• a - means "outside of"
• PERFECT FLOWER - has both male and female reproductive organs
• IMPERFECT FLOWER - Has either male or female reproductive organs, but not both
• PETALS - most obvious parts, brightly colored for pollination
• PETALS - modified leaves, provide a platform for insects to land
• RECEPTACLE - Enlarged end of the flower
• Stamen - male part of the flower
• Anther - pollen sac with pollen grains, produces pollen grains.
• Filament - holds the anther to disperse pollen
• Pollen Grains - contains 2 haploid cells, combine through meiosis
• Carpels - also known as pistil, the female part of the flower.
• Stigma - swollen structure at the end of the style; receives the pollen
• Style - stalk that connects stigma to ovary, pathway for pollen
• Ovule - structure that will develop into a seed, ovum is haploid
• Ovule - attatched to a placenta by the funicle
• Funiculus - equivalent to umbilical cord
• Placenta - provides connection into the ovary walls, provides nutrients to developing embryo
• SEPALS - modified leaves which enclose
• ORGANS OF FLOWERING PLANTS:

  1. Petals
  2. Stamen
  3. Carpels
  4. Sepals
  5. Receptacle
• MALE ORGANS OF FLOWERS:

  1. Anther
  2. Filament
• FEMALE ORGANS OF FLOWER: (Carpels)

  1. Stigma
  2. Style
  3. Ovary
  4. Ovule
  5. Funiculus
  6. Placenta
• When total water potential is higher outside, the plant is kept erect.
• Pathways of water and mineral movement in the roots:

  1. Symplast
  2. Apoplast
• Stigma - receives the pollen grains
• Ovary - structure that will develop into a fruit after fertilization.
• ovary - produces and protects one or more ovules
• Style - holds the stigma in a suitable position to trap pollen grains
• The mature stigma secretes a sugary fuluid that stimulates the pollen grains to germiniate.