4.Role of Vegetative Reproduction in Plant Prop Flashcards
1
Q
What is meant by vegetative reproduction?
A
- From of asexual reproduction
- Entails growing a new plant from part of an existing plant.
- New plant is a clone of the parent plant (genetically identical)
2
Q
State key differences of sexual and non-sexual propagation
A
Sexual
- Combination of both parents genes
- Genetic variation
- Slight unpredictability of outcome
- Seed is the outcome
- In nature can be spread large distances
- Pollinators are needed
Non-sexual (vegetative)
- In nature can not spread far from parent plant
- Genes are identical to parent plant - no variation
- Total consistency and predictability
- No pollinators needed
3
Q
Benefit to plant of asexual reproduction?
A
- Fertilisation is unnecessary so even when pollination is not possible plants can still multiply
4
Q
Benefit to gardeners of vegetative propagation?
A
- Retains characteristic of parent plant - predictable (same cultivar name)
- Quicker to reach maturity
- Avoids seed dormancy problems
- Some cultivars can only be reproduced by vegetative means
- No pollinators are needed
5
Q
Limitations of propagating by vegetative means
A
- Limited availability of material
- Lack of variation /adaptation
- Transmission of disease (virus)
- Different propagation requirements and skills
- Clones need to be stable to survive
6
Q
Types of artificially occurring vegetative reproduction
A
- Build on natural process, usually encouraging shots to form adventitious roots
- Division
- Layering - Air layering
- Cuttings - leaf, sticking, heel, hardwood
- Grafting
- Micro propagation
7
Q
Types of naturally occurring vegetative reproduction
A
- Close to parent plant but can survive separately
- Bulbs
- Corms
- Rhizomes
- Runners
- Suckers
- Stem tubers
- Root tubers
