A pressure-volume analysis of aubergine (Solanum melongena) leaves following water stress was undertaken to determine a possible role of changes in cellular water relations in influencing stomatal conductance responses to water stress. A comparison of two methods of rehydrating the leaves was also undertaken. It was shown that the rehydration of excised leaves did not reveal osmoregulation, whilst rehydration of intact plants did reveal osmoregulation following water stress. An increase in the bulk volumetric elastic modulus and the bound water fraction also occurred in response to water stress. These results are discussed in relation to pressure-volume technique and stomatal conductance responses to drought.
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Eamus et al. (1990) studied this question.
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