Transpiration of Helxine solierolii and the effect of drought.

Published online
22 May 1970
Content type
Journal article
Journal title
Journal of Applied Ecology

Lake, J. V. & Postlethwaite, J. D. & Slack, G.

Publication language


In 2 glasshouse experiments, one in summer, the other in winter, Helxine soleirolii growing in John Innes No. 1 potting compost was either irrigated so that the soil-water deficit never exceeded 4 mm or was left unirrigated. The resistance to water transport between the near-surface soil layers and transpiring leaves was negligible when the daily transpiration rate of irrigated plants was 0-4 mm. Changes in the transpiration rate of plants in drying soil, relative to that of irrigated ones, were attributed to changes in the water-vapour conductance of the stomata resulting from changes in soil-water potential these 2 factors being linearly related over a range of potentials from -1 bar to less than -20 bars.

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