Abstract
Abstract Root systems of Pittosporum tobira Thunb. plants were exposed to temperatures of 27°, 30°, or 40°C for 6 hours daily for 7 months. Top and root growth, root carbohydrate levels and photosynthetic rates were reduced by the 40° treatment. Content of K, Fe, and Zn in leaf tissues were reduced at highest root temperatures, while N content showed the opposite response.
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