Topic 4 Element 3 Flashcards
Advanced Propagation Techniques
Describe the following techniques used to overcome dormancy : Scarification
Where there is a hard outer shell this needs to be breached to enable water to reach inside. You can use mechanical methods to scratch the surface. This works well for large items or small numbers.
Or use acid, but care needs to be taken to ensure the seed is cleaned afterward.
Describe the following techniques used to overcome dormancy :
Stratification
Putting them into cold climates to give the impression that they are in dormancy and will germinate once the temperatures rise again
Describe the following techniques used to overcome dormancy :
Vernalisation
A process by which plants transition from the vegetative stage to the reproductive stage after being exposed to a period of cold temperatures to induce flowering
Describe the following techniques used to overcome dormancy :
gibberellin soaks
A form of gibberellin acid can help with some difficult seeds but not all. It has to be used with care to ensure the right concentration is used.
Propagation methods used in plant collections - describe the main elements of these - Layering
Air Layering – remove bark to expose cambium Spread moss around the wound and cover it in a plastic bag. Moss needs to be moist, not wet.
Simple layering allow the plant to touch the ground and to form a root.
Propagation methods used in plant collections - describe the main elements of these : Seed collection
Collection and store when dry and disease-free. Place in a dry air tight container labelled with date and species.
Store in a cool dry environment. Be aware of the viability of the seed.
Propagation methods used in plant collections - describe the main elements of these - bulb and corm propagation
Division – using offsets
Seed – from the mature plant. Not always true to type
Bulbils and scales – specific to Lillies bits that cme off and can be placed in compost
Propagation methods used in plant collections - describe the main elements of these - grafting and other associated techniques
Taking one root and placing it with the stem of another.
This combines the benefits of two different varieties.
The plants are fused together.
What is clonal selection?
To do with Cloning. Using the best clones as the basis of the propagation of a plant such as Lleyandii
What is the relevance of micropropagation in plant collections?
A reliable and efficient method for the propagation of diverse plant species and varieties
Rapid Multiplication: Micropropagation allows for the rapid multiplication of plants.
Preservation of Genetic Diversity
Space Efficiency
All year round production
How does growing medium affect rooting and % take affect the management of a propagation unit
It needs to be the right structure for the plant. For example free draining.
Nutrient availability
Water management
pH level
How do module sizes affect watering and plant growth affect the management of a propagation unit
Not too big to waste space and resources and to help root not to be too shallow.
Not too small to make the plant root bound
How do rooting treatments affect % take affect the management of a propagation unit
Rooting treatments can encourage and increase plant growth.
How does nutrition within modules affect propagation success affect the management of a propagation unit
Adequate nutrition is essential for root development during propagation. Macronutrients such as nitrogen (N), phosphorus (P), and potassium (K), as well as micronutrients like iron (Fe) and zinc (Zn), play critical roles in root growth and overall plant vigor. Ensuring the availability of these nutrients in the propagation modules promotes healthy root formation and enhances propagation success.
How do different temperature regimes affect rooting and plant growth affect the management of a propagation unit
Temperature influences root initiation, elongation, and overall root development.
Dormancy breaking
Seasonal breaking
