Weight-Change Patterns in Cut and Intact Rose Shoots II. Floral and Foliar Contributions as Related to Competition for Water.

Foliar contributions to diurnal light/dark changes in total shoot weight were assessed, with the aid of non-destructive beta-ray gauging (see Part I, De Stigter 1982), in two cultivars of intact or cut roses, the cut ones in water or in glucose + Al(3+). Once the flower buds of the intact, single-stem plants had fully opened, weight changes in both cultivars were mainly due to the gradually senescing blooms, with a minor contribution of the foliage. In the cut roses cultivar differences were distinct in overall performance resulting from water or glucose treatment, and in relative resistance or sensitivity of the foliage to water stress.