2006_PLSC201_L07_GrowthandDevelopmentWeb

Lecture 7Growth and Development : 

Lecture 7Growth and Development Growth Irreversible change in __________ Development Irreversible change in __________ Juvenile Adult __________ Adult __________

Growth : 

Growth Components 1. Cell __________ 2. Cell __________ 3. Cell __________

Cell Division : 

Cell Division Meristematic Cells (Stem Cells) __________ Apical Meristem (SAM) __________ Apical Meristem (RAM) __________ Buds __________ Meristems Vascular Cambium Cork Cambium __________

Cell Enlargement : 

Cell Enlargement Adjacent to __________ __________ growth Zone of __________ - Root __________ Pressure new cell walls

Cell Differentiation : 

Cell Differentiation Cessation of Cell __________ __________ cell walls Xylem - Vascular tissue Fibers __________ cells root hairs leaf hairs __________ cells Flowers __________

Types of Growth : 

Types of Growth 1. __________ Terminal shoot apex flowers 2. __________ Axillary buds flower Terminal buds vegetative 3. __________ Flower once then die 4. __________ Flower repeatedly over many years

Types of Growth : 

Types of Growth 5. __________ Monocarpic Flower in one season and then die 6. __________ Monocarpic Flower in second season and then die

Types of Growth : 

Types of Growth 7. __________ Perennial Polycarpic __________ Flower early and then go dormant Bulbs __________ Flower throughout season Shoot dies in Fall

Types of Growth : 

Types of Growth 8. __________ Perennial Polycarpic __________ flower only once per year __________ Bearing flower and set fruit every other year __________ Flowering more prolific in some years than in others

PLANT GROWTH REGULATORS : 

PLANT GROWTH REGULATORS 1. __________ a. Substance produced by a plant that affects the pattern of growth and development. b. Production by the plant is regulated by the environment. 2. __________ a. Substance applied to the plant that alters growth and development in the same way that endogenous substances do. b. May be the same or different chemically from the endogenous substance

PLANT GROWTH REGULATORS : 

PLANT GROWTH REGULATORS 3. __________ a. Substance that acts in very low concentration (micro-molar or less) b. Produced in one part of plant and act in another (__________) c. Have the same response in many different plant species

PLANT GROWTH REGULATORS : 

PLANT GROWTH REGULATORS A. Primary 1. __________ 2. __________ 3. __________ 4. __________ 5. __________

PLANT GROWTH REGULATORS : 

PLANT GROWTH REGULATORS B. Secondary - newly discovered 1. Jasmonic Acid 2. __________ 3. Juglone 4. __________ Acid 5. Polyamines

PLANT GROWTH REGULATORS : 

PLANT GROWTH REGULATORS C. Others - not yet confirmed or understood 1. __________ Hormones animals maybe plants 2. Oligosaccharides cell wall signaling 3. __________ inositol phosphates, diacylglycerides 4. mRNA Floigen (floral induction)