Introduction to Botany: Plant Anatomy Master Gardener Training Series 2013 1 Botany Basics John Punches Oregon State University Botany is... The study of plants. Plants in our Ecosystem Capture sun’s energy Food source Replenish atmospheric oxygen Participate in water cycle Moderate world climate Provide shelter Source of numerous raw materials Botany Applied Identify plants Grow & propagate plants Influence flowering & fruit production Control unwanted growth Maintain plant health Modify plant features Reading Assignment extension.oregonstate.edu/mg/botany/ Basic Classifications Vascular vs. Non-vascular Seed vs. Seedless Flowering vs. Flowerless Big 2 Vascular Plant Divisions Flowering Plants (Anthophyta) Cone Bearing Plants (Coniferophyta)
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Introduction to Botany: Plant AnatomyMaster Gardener Training Series
2013
1
Botany Basics
John PunchesOregon State University
Botany is...
The study of plants.
Plants in our Ecosystem
Capture sun’s energyFood sourceReplenish atmospheric oxygenParticipate in water cycleModerate world climateProvide shelterSource of numerous raw materials
Botany Applied
Identify plantsGrow & propagate plantsInfluence flowering & fruit productionControl unwanted growthMaintain plant healthModify plant features
underground stem with buds and shoots at top and fibrous roots at bottom
Introduction to Botany: Plant AnatomyMaster Gardener Training Series
2013
7
Leaves
Leaf Functions
Photosynthesis - use sunlight to make foodRespiration - use food to make energyTranspiration - lose water (as vapor) to
atmosphere
Leaf Parts
Lamina (blade)
Petiole
Introduction to Botany: Plant AnatomyMaster Gardener Training Series
2013
8
Leaf Anatomy
Guard Cells
Lower epidermis
Intercellular Chamber
Vascular Bundle
Palisade Mesophyll
Stoma
Spongy Mesophyll
Upper EpidermisCuticle
Cuticle
Leaf Model
upperepidermis
palisademesophyll
spongymesophyll
lowerepidermis
stoma
vascularbundle
phloem
xylem
Stoma & Guard Cell
Stoma Guard Cell
Stomatal Control
Open Closed
Leaf Surface Leaf Forms
Introduction to Botany: Plant AnatomyMaster Gardener Training Series
2013
9
Types of Leaves
Scale leaves (cataphylls) - enclose and protect rhizomes and budsSeed leaves (cotyledons) - store food for seedlingsSpines & Tendrils - protect or help support Storage leaves - found on bulbous plants &
succulents, store foodBracts - modified, often brightly-colored leaves