In terms of negative water potential, creosote bushes can operate fully at-50 bars of water potential and have been found living down to-120 bars, although the practical average floor is around-70 bars, where the plant's need for cellular respiration generally exceeds the level that the water-requiring process of photosynthesis can provide.

In terms of negative water potential, creosote bushes can tolerate extreme drought stress by operating fully at-50 bars of water potential and have been found living down to-120 bars.

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