9 Heat2-21 - Plant adaptation to heat stress We now turn to...

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Unformatted text preview: Plant adaptation to heat stress We now turn to the question of how plants living in hot environments function efficiently. The means by which plants cope with hot environments is well- illustrated by creosote bush (Larrea divaricata), a common shrub in the Sonoran and Mojave Deserts of the southwestern U.S. Creosote bush is a perennial shrub that may remain physiologically active throughout the year, even though air temperatures vary greatly from winter to summer. *In death valley, for example, where creosote bush is common, the mean daily maximal temperature is: 18 C in January, but 46C in July!! When plant biologists from Stanford University took a mobile laboratory out into the desert and measured the photosynthetic performance of creosote bush, they discovered that it had a large capacity for acclimating to the prevailing temperature. In other words, plants growing under...
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9 Heat2-21 - Plant adaptation to heat stress We now turn to...

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