Effects of Rising Atmospheric Concentrations of Carbon Dioxide on Plants | Learn Science at Scitable thumbnail
Effects of Rising Atmospheric Concentrations of Carbon Dioxide on Plants | Learn Science at Scitable
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will have major implications for plant physiology and growth. Under elevated CO2 most plant species show higher rates of photosynthesis, increased growth, decreased water use and lowered tissue concentrations of nitrogen and protein. Rising CO2 over the next century is likely to affect both agricult
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  • will have major implications for plant physiology and growth. Under elevated CO2 most plant species show higher rates of photosynthesis, increased growth, decreased water use and lowered tissue concentrations of nitrogen and protein. Rising CO2 over the next century is likely to affect both agricultural production and food quality.
  • A number of experiments have found that some plant species that respond positively to elevated CO2 when grown alone experience decreased growth under elevated CO2 when grown in mixed plant communities (Poorter & Navas 2003).
  • While a great deal of media and public attention has focused on the effects that such higher concentrations of CO2 are likely to have on global climate, rising CO2 concentrations are also likely to have profound direct effects on the growth, physiology, and chemistry of plants, independent of any effects on climate (Ziska 2008). These effects resul...
  • One of the most consistent effects of elevated atmospheric CO2 on plants is an increase in the rate of photosynthetic carbon fixation by leaves.
  • Carbon dioxide concentrations are also important in regulating the openness of stomata, pores through which plants exchange gasses, with the external environment. Open stomata allow CO2 to diffuse into leaves for photosynthesis, but also provide a pathway for water to diffuse out of leaves. Plants therefore regulate the degree of stomatal opening (...

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