P1254325774yOgPM

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OKeefe
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OKeefe
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Monet
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Matisse
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Manet
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van Gogh
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• Picasso

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• Escher

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• Salvador Dali

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Abstract Art Extra Credit (5 max)

• Create an abstract representation of an
  angiosperm(s) utilizing similar techniques you
  have seen by some of the greats.
• Due 3/14-15

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Chapter 38 Quick Overview
Flower Anatomy

• Sepals, Petals, Stamens (M), Carpels (F)
• Male Female
• (Stamens) (Carpels)
• Filament Stigma
• Anther Style
• Pollen (sperm) Ovary, ovule
• Receptacle
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Embryo sacs
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Pollination

• (pollinating agents)
• Self pollination vs. self incompatible (self/
  nonself)
• S-genes (fig. 38.6 fig. 38.5)
• Sporophytic and gametophytic self-incompatibility

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Self-Incompatibility prevents
Self-Fertilization in some plants

• Self/Non-self recognition
• How is this different from humans?
• If SELF is detected
• RNA hydrolyzing enzymes may destroy
  pollen
• Or Stigma maybe affected

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Germination

• Plants in Motion - Corn germination

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Fruit Types

• What is the definition of a true fruit ?
• Simple, aggregatemultiple (p.738)

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Asexual Reproduction

• clone of parent
• vegetative reproduction, fragmentation, apomixis
  (unfertilized-- seed production)
• Protoplast fusion p.742
• What is monoculture?

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CHAPTER 39 Control Systems in Plants

• Plant Responses to Internal and External Signals

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What is a hormone anyway?

• HormoneGreek for to excite
• - produced in a specific area
• travel to another specific area (target organ)
• used in minute concentrations

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The Main Players

• 5 PLANT HORMONES to know and their functions,
  target sites, plant conditions, examples
• auxin cytokinin gibberellin
  ethylene abscisic acid

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Auxin

• IAA (indoleacetic acid)
• Location seed embryo meristems of apical buds
  and young leaves
• Function stem elongation root growth,
  differentiation, branching fruit development
  apical dominance tropisms
• Auxin over time

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Cytokinins

• Modified forms of adenine
• Location roots (and actively growing tissues)
• Function root growth and differentiation cell
  division and growth germination delay
  senescence (aging) apical dominance (w/ auxin)

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Gibberellins

• GA3
• Location meristems of apical buds and roots,
  young leaves, embryo
• Function germination of seed and bud stem
  elongation leaf growth flowering (bolting)
  fruit development root growth and differentiation

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Abscisic acid

• ABA
• Location leaves, stems, roots, green fruit
• Function

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Ethylene

• Gaseous hormone
• Location ripening fruit tissue stem nodes
  aging leaves and flowers
• Function fruit ripening oppositional to auxin
  (leaf abscission) promotes/inhibits
  growth/development of roots, leaves, and flowers
  senescence

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Chapter 39.2
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Daily and Seasonal Responses

• Circadian rhythm (24 hour periodicity)
• Photoperiodism (phytochromes red light
  sensitive)
• Short-day plant light period shorter than a
  critical length to flower (flower in late summer,
  fall, or winter poinsettias, chrysanthemums)
• Long-day plant light period longer than a
  critical length to flower (flower in late spring
  or early summer spinach, radish, lettuce, iris)
• Day-neutral plant unaffected by photoperiod
  (tomatoes, rice, dandelions)
• Critical night length controls flowering
• Let's see this

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Phototropisms

• Cryptochromes (blue light sensitive)
• Positive is growth toward light
• Negative growth away from
• Sunflower phototropisms
• Sunflower photomorphogenesis

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Thigmotropisms

• Morning Glory response
• Mimosa plant response
• Example of turgor pressure change as well

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Gravitropisms

• Depends on starch filled vessels (amyloplasts)
  Orientation changes result in differential growth
  causing curvature.
• Roots display positive
• Stems display negative
• Lets see it

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Lab 5 Cellular Respiration in Germinating Peas

• C6H12O6 O2 - - - gt CO2 H2O
• Issue of O2 CO2 Solution KOH CO2 ? K2CO3
• Also PV nRTso, if water temp and volume is
  constant then water will move toward lower
  pressure area. As oxygen is consumed during
  respiration, its volume is reduced. Net result
  is a decrease in volume within in the tube and
  thus a decrease in pressure in the tube (so water
  will continue to move in as respiration occurs)
• Purpose of only rock tube?Allow detection of any
  changes in volume due to atmospheric pressure
  changes or temperature changes.