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Published byEunice Juliet Lynch Modified over 9 years ago
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Sexual Recombination of genetic materials to form a unique genetic individual Asexual Use of vegetative organs to create plantlets genetically identical to the parent plant
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Asexual Propagation
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Plants are uniform Quick establishment of plants Only means of propagation in certain speices Seedborne diseases avoided Less expensive Heterozygous material may be propageted without genetic alteration
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Systemic viral infection can spread to all plants Planting materials are bulky Storage of asexual material is cumbersome and usually short term Genetically identical and thus subject to the same hazards Mechanized propagation in some cases not practical
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Divisions Cuttings Layers Grafting/budding Tissue Culture
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Remove loose soil Remove dead leaves and stems Note root system of plant Spreading Clumping Rhizome Tuber
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Spreading root systems Many slender roots from center of plant Plants can be invasive Cut with shears or pulled apart by hand Asters, bee balm, lamb’s ear, purple coneflower, many common perennials
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Clumping root systems Many fleshy roots from crown of plant Can crowd own centers Keep one bud/eye with each division Astilbes, hostas, daylilies, orn. Grasses
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Rhizome division ‘Horizontal stems’, Primarily bearded iris Divide after flowering through fall Cut and discard rhizome sections > 1 year Inspect for disease and insect damage Cut back leaves to ‘fans’ Replant with top of rhizome above soil level
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Tuberous roots Enlarged roots for storage Divide with sharp knife Each root must contain stem tissue and bud Can be replanted or stored Dahlias
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Vegetative plant part which is severed from the parent plant in order to regenerate itself, thereby forming a whole new plant Leaves, stems, roots
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Herbaceous: succulent, soft materials (green) Softwood: soft, succulent growth of woody plants Semi-Hardwood: partially mature wood of the current season’s growth Mid summer, leaves present
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Hardwood: dormant, mature stems Taken before spring growth 6-12 inches Grapes, roses, honeysuckle Conifer: Obtained in early spring Prefer cool and humid conditions Juniper, spruce
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Axillary Bud Terminal Bud Stem Leaf Adventitious Roots
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Cane/Shoot Cutting Leaves Stems Buds
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Axillary Bud Terminal Bud Stem Leaf New bud
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Full or partial leaf cuttings African violet, sansivieria Leaf-vein cuttings Plantlets Leaf-bud cuttings Rhododendron
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Leaf Cutting Leaf only
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Cut end of branch Cambium exposed
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Stems still attached to their parent plant may form roots where they touch a rooting medium Severed from the parent plant, the rooted plant becomes a new plant
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Tip LayerSimple LayerCompound Layer StoolingAir Layer Stolons
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Useful procedure on leggy plants Wound stem and cover with moist medium to induce rooting
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