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Intro to Horticulture
Dr. Goodwin of UCM - 2/20/14 Lecture
21
Agriculture
Undergraduate 1
02/20/2014

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Term
Plant Propogation
Definition
Sexual Reproduction :
-seeds produced
-daughter plants show variations
-variation result of meiosis
Term
Asexual Reproduction
Definition
-No Seeds
-Daughter Plants Identical
-Mitosis: Identical Daughter Cells
Available from : Bulblets from bulbs - runners - suckers - cuttings
Term
Asexual Reproduction also called Vegetative or clonal propogation
Definition
-plants have only one parent
-new plants are clones of parents
-seeds can have two parents but not always
Term
totiopotency
Definition
each plant cell has all the genetic info needed to produce a complete plant
Term
Competence
Definition
The ability of a cell to change i's fate - root cell to produce shoot cells- stem cells to produce root cells
Term
low competence
Definition
unable to change
Term
given the right environmental cues- it's possible to to propogate new plants from
Definition
; stems ; leaves ; buds ; roots - but only with grafting
Term
advantage to asexual reproduction 1
Definition
-only way to maintain a unique characteristic of a particular plant
-cultivars can only be propagated asexually
(October glory red maple)
Term
advantage to asexual reproduction 2
Definition
some plant species have so much genetic variability that seed reproduction results to inferior plants ( apples, pears, plum, peach, and rassberry)
Term
advantage to asexual reproduction 3
Definition
some plant species produce few seeds or seed hard to germinate (n some Verbanums, and American holly
Term
advantages to sexual reproduction 4
Definition
produce many plants more quickly than by seed
Term
Disadvantages to sexual Propagation
Definition
1. Difficult to prevent transmission of pathogens - so if the parent has a virus/ bacteria - it's likely that the cutting will be infected also
2 more costly than seed propogation
Term
Methods of asexual propagation : Occur in Nature
Definition
cuttings : layering : division : apomixus
Term
Methods of Asexual propagation the Never occur in nature
Definition
grafting ; budding ; tissue culture
Term
Cuttings
Definition
-Definition : detached vegetative parts of the plant
-can regenerate an entire plant if given the right conditions
-there are four basic types of cutting
Term
Basic types of Roots 1)Stem cuttings
Definition
-always include either terminal or lateral buds
-encourage the formation of roots by using
a)Intermittent mist
b)rooting hormones
c)bottom heat
d)rooting media
Term
Basic types of Roots 1)Stem cuttings
Definition
-always include either terminal or lateral buds
-encourage the formation of roots by using
a)Intermittent mist
b)rooting hormones
c)bottom heat
d)rooting media
Term
Basic types of cuttings 2) Leaf Cutting
Definition
a new plant is propagated from a single leaf (jade and African violet)
Term
Basic Types of Cuttings 3)Leaf -bud cuttings
Definition
- used with species that make roots but not shoots from a leaf cutting.
- the shoots arise from the bud
-also called a heel cutting
Term
basic types of cuttings 4) root cutting
Definition
-used to generate shoots, the shoots arise from adventitious buds on the root
Term
Adventitious roots
Definition
roots from stem cells
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