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 how do plants reduce transpiration?

Plants exhibit some adaptations to reduce the rate of transpiration, these are as follows-

  •  Thick cuticle cover − The waxy layer of cuticle over the epidermis prevents excessive transpiration.
  •  Number of stomata − The number of stomata in leaves is reduced and they are usually concentrated on the lower side of the leaf in order to reduce the water loss.
  • Sunken stomata − In some leaves, the stomata sink into the leaf and get covered by hair. 
  • Epidermal hair − The leaf surface is sometimes covered by a thick coating of hair to reduce transpiration

@Heramb:- Good answer, keep posting!!

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Plants compensate for water loss through transpirationThey can also compensate for water loss by taking up water from the soil around them through the roots. They can also compensate for water loss by taking up water from the soil around them through the roots.

Transpiration rate would decrease in a dark, humid condition because plants close their stomatas when its dark out to conserve their gases/water, and when its humid, this means that the air surrounding the leaf would be saturated to a certain point. If the air around the leaf is completely humid, say 100% humidity, then its completely saturated and there is no place to water molecules within the plant to evaporate. If the humidity was lower than that, say 60-70%, there would still be room for the water molecules to evaporate, but not much, so the rate of water loss is reduced.

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