1、Biology 215,Plants for Pleasure & Profit,Why horticulture?,Economical Value Enhanced property value Reduced costs Can provide a career, living Exercise,Why horticulture?,Emotional value,Why horticulture?,Provide animal habitat,Horticulture is a business,Park Seeds Jackson & Perkins Lancaster Farms E
2、ncore azaleas Witherspoon Roses Plant Delights,Horticulture is a science,NCSU Horticulture Horticulture information leaflets Journals Journal of the American Society of Horticultural Science Journal of Horticultural Science & Biotechnology,Plant Classification,Botanical Horticultural,Scientific & bi
3、nomial nomenclature,Brassica oleracea cv. Green Comet Lycopersicon esculentum cv. Better Boy Hibiscus syriacus Diana,Phlox,P. paniculata P. subulata,Growth cycles,Growth cycles,Annuals,Growth cycles,Biennials,Growth cycles,Perennials,Growth cycles,Monocarps,Growth habit classification,procumbent,ere
4、ct,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,Dicots,
5、Monocots,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,Perfect vs. imperfect flowers,Perfect having both male and fe
6、male 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
7、, 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
8、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,
