Lecture 1: Plant Physiology Flashcards
- The science that studies plant
function - Studies the processes that take
place within a plant - What is going on in plants that
accounts for their being alive
Plant Physiology
Plant function can be
understood on the basis and
principes of _______ and
_______ , which in turn rely on
_______
physics, chemistry, mathematics
5 Elements of Plant Physiology
- Phytochemistry - Biochemistry of plants
- Environmental interactions - Interactions with the environment
- Molecular and cell biology - Including genetics
- Cellular interactions - And functions
- Plant anatomy and morphology - Structure of plants
4 things that a plant physiologist studies
- Nutrition of plants
- Influence of the environment on plant processes
- Products of plant activities
- Sequence of events that results in growth and development of plants
Plants respond to…
- Light (photoperiodism)
- Temperature
- Gravity
- Nutrient and water availability
- Disease
General activities of plants
- Seed germination
- Growth (stems, roots, leaves, buds, etc.)
- Flowering
- Opening and closing of stomata
- Tropism
What plants do…
- Absorb water and nutrients and transport them to where they are needed within the plant
- Carry out photosynthesis and respiration
- Grow and reproduce
- Protect themselves from herbivores, pathogens, and hostile environments
How do plants grow and how do the benefits accruing from their presence can be maximized(optimized)?
The role(s) of plant physiology in forest(ry)
Common practices followed in forestry like leaf and branch pruning, timber stand improvement techniques, mulching, weeding, etc. have physiological basis
The role(s) of plant physiology in forest(ry)
Defined as a community of plants dominated by trees
Forest
Result of physiological processes of plants
Forest growth
The process of irreversible increase by celldivision and enlargement, including synthesis of new cellular material and
organization of sub-cellular organelles
Growth
The process involving conversion of reserve materials intro structural materials
Growth
The process of qualitative change in plants over time, phasic in nature (vegetative and reproductive), which is controlled by various environmental and genetic factors
Development
The production of new individual plants or offspring by sexual or asexual means
Reproduction
- The food and manufacturing process in green plants
- Combines CO2 and H2O in the presence of light to make sugar and oxygen
Photosynthesis
The process through which plant leaves, stems, and roots consume oxygen and give off carbon dioxide
Respiration
The process by which plant roots take in water and nutrients
Absorption
The process by which plant lose water from leaves and stems through evaporation (stomatal, lenticular, cuticular transpiration
Transpiration
The process by which food and nutrients are moved within a plant from one part to another
Translocation
The process by which plant increases in number (of individuals)
Reproduction
