Asexual Plant Propagation Why is asexual propagation needed

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Asexual Plant Propagation

Asexual Plant Propagation

Why is asexual propagation needed? • Not all plants produce seeds • Hybrids •

Why is asexual propagation needed? • Not all plants produce seeds • Hybrids • Some plants are difficult to grow from seed

Cuttings • Pieces of leaves, stems, buds, or roots used for propagating plants •

Cuttings • Pieces of leaves, stems, buds, or roots used for propagating plants • Most commonly used (especially commercially) • Softwood cuttings-taken when plant tissue is soft and tender • Hardwood cuttings-taken when plant tissue is hardened and more woody

Essentials needed to root: • Conditions must include: – – Moisture Oxygen Warmth (40

Essentials needed to root: • Conditions must include: – – Moisture Oxygen Warmth (40 degrees F or above) Light • Needed for photosynthesis (food production) • Not needed for stored hardwood cuttings – Sterile rooting medium to prevent disease

Why do roots form? • Downward movement of materials from the leaves (photosynthesis) is

Why do roots form? • Downward movement of materials from the leaves (photosynthesis) is incomplete • Materials accumulate and start healing and rooting • Cuttings from young plants root must faster • Soft, newly formed shoots also root easier

Softwood and Semihardwood Cuttings • Taken after the current or present season’s growth has

Softwood and Semihardwood Cuttings • Taken after the current or present season’s growth has partially matured or hardened • Should be able to bend • Must have parent plant that has grown 2 -6 inches of new growth during current year – From the tip of a branch – A shoot that is growing from the base of the plant • Early morning is best time to take cutting • Remember to keep the right side up (use leaves and buds as help)

The Process: 1. 2. 3. – – – Collect the wood and label Fill

The Process: 1. 2. 3. – – – Collect the wood and label Fill container with rooting medium Make the cutting Use mature stem 3 -4” long Include 2 or 3 buds on each cutting Cut top straight across Cut bottom at angle • Allows more surface area

The Process: 4. 5. 6. Treat the cutting with rooting hormone Insert cutting in

The Process: 4. 5. 6. Treat the cutting with rooting hormone Insert cutting in the rooting medium Water to settle the medium around the cutting 7. Insert the label into the rooting container 8. Control atmosphere by covering with plastic and placing in indirect sunlight

Herbaceous Cuttings • Made from succulent greenhouse plants – Ex: geranium, carnation, chrysanthemum •

Herbaceous Cuttings • Made from succulent greenhouse plants – Ex: geranium, carnation, chrysanthemum • Most florist crops propagated this way • Cuttings are made 3 -6 inches long with leaves left on the stem • Sterile rooting medium needed • Fungicide may be necessary • Very successful

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