Fig. 7.
Changes in (A) vapour pressure deficit (Da), (B) fruit volume, and (C) pedicel sap flow, for a fruiting Actinidia chinensis ‘Hort16A’ plant temporarily exposed to controlled conditions. Da was varied abruptly between 0.9 kPa and 3.0 kPa, and the resulting changes in fruit growth and sap flow observed. The pedicel phloem was heat girdled on day 191 (left-hand vertical dashed line; sap flow measurements were briefly interrupted by the resulting temperature gradients) and the pedicel was cut, severing the xylem, on day 194 (right-hand dashed line). Horizontal bars in A indicate dark periods.