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Plant Transport - Coggle Diagram
Plant Transport
Modified Food Storage in Plants
Carrots
Modified Root
Root becomes swollen with starch
Tap root anchors and absorbs water
Potatoes
Modified Stem
Tips of stems become swollen with starch
Lettuce
Modified Leaves
Swollen leaves produce bulbs
Leaves surround central apical bud
Carbon Dioxide Uptake and Transport
External
Carbon dioxide diffuses into air spaces and then into ground tissue
Internal
Carbon dioxide is produced during respiration
Products of Photosynthesis
Oxygen
Diffuses into air spaces in leaf
Diffuses through stomata into atmosphere
Glucose
Used immediately for respiration
Converted starch for storage
Converted to sucrose and transported in the phloem
Water Uptake by Roots
Upward Movement of Water
Root pressure
Transpiration
Control of Transpiration
Presence or Absence of Cuticle
Stomata Away from Direct Sunlight
Guard Cells Open and Close
Stomata Remain Closed During Adverse Weather
Cohesion-Tension Model
Dixon & Joly
Transpiration puts column of water under tension
Stomata open and transpiration occurs
Water evaporates from xylem tissue into air spaces in leaf
Cohesion
Sticking Together of Similar Molecules
Adhesion
Sticking Together of Different Molecules
Transpiration stops at night which creates lack of tensions and xylem returns to original shape
Mineral Uptake and Transport
Minerals Needed for Synthesizing Plant Components
Calcium
Magnesium
Nitrates
Phosphates
Potassium Ions
Gas Exchange
Sites of Gas Exchange
Branch and Stems
Lenticels
Leaf
Stomata
Surrounded by two guard cells
Close when carbon dioxide is high (during night)
Carbon Dioxide diffuses through stomata
Millions of stomata
Excess water lost through stomata