Limitations to photosynthesis of lettuce grown under tropical conditions: alleviation by root-zone cooling.

@article{He2001LimitationsTP,
  title={Limitations to photosynthesis of lettuce grown under tropical conditions: alleviation by root-zone cooling.},
  author={Jie He and Sing Kong Lee and Ian C. Dodd},
  journal={Journal of experimental botany},
  year={2001},
  volume={52 359},
  pages={1323-30}
}
Aerial parts of lettuce plants were grown under natural tropical fluctuating ambient temperatures, but with their roots exposed to two different root-zone temperatures (RZTs): a constant 20 degrees C-RZT and a fluctuating ambient (A-) RZT from 23-40 degrees C. Plants grown at A-RZT showed lower photosynthetic CO2 assimilation (A), stomatal conductance (gs), midday leaf relative water content (RWC), and chlorophyll fluorescence ratio Fv/Fm than 20 degrees C-RZT plants on both sunny and cloudy… CONTINUE READING
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