intro to pp oct 27
Overview of Remaining Semester Schedule
5 weeks left of classes.
Summary of what to expect moving forward.
Following these 5 weeks, a finals week will occur.
Upcoming Tests and Labs
Upcoming small test expected in 2-3 weeks.
Final exam scheduled 2-3 weeks after the small test.
Labs will continue with a focus on propagation, especially in preparation for next semester.
Seasonal Learning Focus
Current focus on Evergreens.
Upcoming labs to focus on various evergreen species.
Exception: grafting will be discussed separately.
Annual plants mentioned as viable subjects for propagation but will be emphasized less in future labs.
Mums are included under the category of annuals.
Study on Roots in Orchids
Discussion on air roots and adventitious roots.
Adventitious roots do not originate from the primary radical.
Introduction to Wound Roots:
Definition of Wound Roots: Roots that arise from damaged tissue, different from primary roots.
Burls, preformed root initials, and their natural occurrence in certain species.
Explanation of latent roots:
Definition: Structures that are present but have not yet developed into functional roots.
How stimulus from environmental conditions can trigger their emergence.
Environmental Influences on Root Formation
Roots can develop due to stressors such as excess mulch.
Discussion of burrows: growths seen on trees such as cherries or oaks, often as a plant’s response to damage.
Example through analogy to human body:
Skin calluses form in response to damage as a protective measure.
Theoretical Discussions
Importance of water and nutrients drawn up from roots post-wounding.
Comparison to plant responses in evolving environmental and injury circumstances.
Rooting Process in Plants
Steps in the Rooting Process:
Induction: Initial stimulus to root formation.
Examples include hormonal treatment and environmental responses.
Differentiation: Change of tissue types in response to stimuli.
Influenced by the conditions offered in the environment including moisture and hormone application.
Initiation: Begins the root formation process where root primordium forms.
Callus tissue created as a result of prior processes.
Callus Tissue Formation:
Comparison to scar tissue in humans as a survival and healing mechanism.
Biological Details:
Parenchyma cells play a role in callus formation and wound healing.
Increasing surface area through wounding aids the assimilation process of roots.
It allows for greater water uptake through proper wounding technique.