lecture 03 - 1/17/2011 The Biology of Cutting Propagation...

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1/17/2011 1 The Biology of Cutting Propagation How Do Cuttings Do That? Why are certain clones difficult-to-root? Scabs and Salamanders Mammals can only renew cells and simple tissues Blood cells, skeletal muscles, skin and liver tissue Repair minor injuries (bones, muscles, tips of toes/fingers & corneas Salamanders, some amphibians and fish can regrow badly injured body parts Regenerate whole organs, multiple tissue and cell types in proper organization Potency = potential to differentiate into different cell types 1. Unipotent 2. Totipotent (stem cells) Understanding how complex organs are regenerated offers hope for therapeutic treatments. Figuratively and Literally Stem Cells ”! What Makes Cutting Propagation Possible? Totiopotency - every cell contains all necessary genetic information to reproduce an entire organism Examples Parenchyma Collenchyma Schlerenchyma Epidermal cells Xylem vessels Phloem sieve elements/companion cells Guard cells 1 billion stem cuttings/year (US) o Bedding plants o Perennials o Potted plants o Fruits, nuts &vegetables Most important regenerative process needed for success: __________________________. Secondary need is for adventitious bud formation.
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This note was uploaded on 04/03/2011 for the course HORT 201 taught by Professor Staff during the Spring '08 term at Purdue University.

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lecture 03 - 1/17/2011 The Biology of Cutting Propagation...

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