Biology 215 Plants for Pleasure & Profit
Why horticulture? Economical Value –Enhanced property value –Reduced costs –Can provide a career, livingcareer Exercise
Why horticulture? Emotional value
Why horticulture? Provide animal habitat
Horticulture is a business Park Seeds Jackson & Perkins Lancaster Farms Encore azaleas Witherspoon Roses Plant Delights
Horticulture is a science NCSU Horticulture –Horticulture information leafletsHorticulture information leaflets Journals –Journal of the American Society of Horticultural ScienceJournal of the American Society of Horticultural Science –Journal of Horticultural Science & BiotechnologyJournal of Horticultural Science & Biotechnology
Plant Classification Botanical Horticultural
Scientific & binomial nomenclature Brassica oleracea cv. Green Comet Lycopersicon esculentum cv. Better Boy Hibiscus syriacus ‘Diana’
Phlox P. paniculataP. subulata
Growth cycles
Annuals
Growth cycles Biennials
Growth cycles Perennials
Growth cycles Monocarps
Growth habit classification procumbenterect climbing Spreading Arching Vertical
Ornamental plant classifications Herbaceous vs. woody Flowering vs. foliage Hardiness zones
Herbaceous plants Annuals, biennials, perennials
Woody plants Vines Shrubs Trees
Shrubs
Trees
Flowering vs. foliage plants
Hardiness classification
Plant anatomy
DicotsMonocots
storage roots
Mycorrhizae fungal association (mutualistic) with roots
Stems Support Conduction Growth Stem functions
Leaf Functions? Photosynthesis Conduction Protection Leaves
Leaf characteristics
Flowers Organs for reproduction
Flower anatomy
Perfect vs. imperfect flowers Perfect – having both male and female parts Imperfect – lacking male or female parts
Imperfect flowers Monoecious species –Staminate and pistillate flowers on the same plant –Oaks, maples, pines, corn, melons, figs, pecans (dichogamous)
Imperfect flowers Dioecious species –Staminate and pistillate flowers on separate plants –Gingko, kiwi, persimmon, cannabis
Flower development The ABC model of flower development –A,B,C = differententially expressed MADS box genes (transcription factors)
Flowers may lack specific flower parts due to mutations in A, B, or C genes
Flowers are contained on an inflorescence
Determinate vs. indeterminate inflorescences Determinate – stem growth ends with a flower(s) Indeterminate – flowers produces along stem (at nodes), stem tip continues to grow
Timing of flowering How does a plant “know” when to flower? Light (intensity and/or daylength) Temperature Hormones
Flower pollination and fertilization
Self-incompatibility
Fruit anatomy