B2.3.9 - Transpiration

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7 Terms

1
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Transpiration

Loss of water vapour from the leaves + stems of plants

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occurs when

hydrogen bonds break

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water vapour

diffuses out the leaf through the stomata

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transpiration rates are affected by

  • temperature

  • humidity

  • wind

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transpiration + temperature

positive correlation → increase in temperature, increase in transpiration → more energy to break hydrogen bonds

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transpiration + wind

increased wind → less transpiration → stomata closes

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humidity + transpiration

negative transpiration → more humidity = smaller concentration gradient → little transpiration when outside of the leaf is saturated with water vapour