The Absorption Lag, Epidermal Turgor and Stomata

Simultaneous measurements of the opening response of stomatato illumination, the development of the Absorption Lag and changesin leaf thickness, showed that the accelerated opening of stomataduring part of the Motorphase coincided with the attainmentof the peak of the Absorption Lag and the beginning of a decreasein leaf thickness. The latter could be attributed in part toa loss of epidermal turgor. These results are discussed in connectionwith attempts to correlate stomatal movements in leaves understress with changes in bulk leaf water properties. Key words: Absorption Lag, epidermal turgor, stomata