The author had previously found that one of the advantages of leaf hairs in Ence

Question

The author had previously found that one of the advantages of leaf hairs in Encelia farinosa was reducing leaf temperatures such that photosynthetic rates or carbon gain rates were higher. Why would lower leaf temperatures result in higher photosynthetic rates?

lower leaf temperatures would cause lower leaf-to-air vapor pressure deficits, which would lower transpiration rates

lower leaf temperatures would be closer to the (relatively low) temperature optimum for photosynthesis in this species

lower leaf temperatures would cause lower leaf-to-air vapor pressure deficits, which would lower transpiration rates

lower leaf temperatures would be closer to the (relatively low) temperature optimum for photosynthesis in this species

Explanation / Answer

Lower leaf temperature would be closer to low temperature optimum for photosynthesis in species

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