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Lecture 8

ZOL 355 Lecture 8: Meeting the Physiological Needs of Plants
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3 Pages
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Department
Zoology
Course Code
ZOL 355
Professor
P.Ostrom

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Meeting the Physiological Needs of Plants
Meeting requirements for photosynthesis: CO2
o Entry of CO2 into the cell
Water loss where CO2 enters the cell
Up to 500g per every g of carbon
o Problems in aquatic environments
Solubility of CO2 is low so does’t diffuse well i
water
CO2 transformed to bicarbonate (HCO3-)
CO2 + H2O H+ + HCO3-
Bicarbonate is large, rate of diffusion is slower than
for CO2
Meeting requirements for photosynthesis: light
o Sun emits all wavelengths in the EMS
Cosmic and gamma rays
X-rays
UV
Visible light
Infrared (IR)
Micro and radio waves
Wavelength distance b/w 2 peaks and
2 troughs
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Description
Meeting the Physiological Needs of Plants Meeting requirements for photosynthesis: CO 2 o Entry of CO i2to the cell Water loss where CO ent2rs the cell Up to 500g per every g of carbon o Problems in aquatic environments Solubility of CO 2s low so doesnt diffuse well in water CO 2ransformed to bicarbonate (HCO ) 3- CO 2 H O2 H + HCO 3- Bicarbonate is large, rate of diffusion is slower than for CO 2 Meeting requirements for photosynthesis: light o Sun emits all wavelengths in the EMS Cosmic and gamma rays X-rays UV Visible light Infrared (IR) Micro and radio waves Wavelength distance b/w 2 peaks and 2 troughs
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