Jack E. Staub, P. Rousos, B. Esther Struckmeyer
The anatomical and nutritional aspects of a fruit disorder in processing cucumber (Cucumis sativus L.) termed "pillowy" were investigated. "Pillowy" is an abnormal white, "styrofoam-like", porous textured tissue in the mesocarp of freshly harvested fruit. When 'Calypso' plants were grown in solution culture containing 200 mg liter-1 Ca under either ambient (74 ± 10% RH) conditions or enclosed in a clear plastic canopy (84 ± 10% RH), "pillowy" was consistently associated with low Ca levels. The frequency of "pillowy" was higher (33%) and mean percent tissue Ca lower (30%) in fruit matured under plastic canopies. Parenchyma cells of "pillowed" fruit were hypertrophied and hyperplastic, with fewer and smaller intercellular spaces. Vascular tissue within some "pillowed" areas was collapsed and necrotic. Anomalies observed in "pillowed" greenhouse and field grown fruit were similar, and more severe at the blossom-end. The observed anatomical anomalies might be explained as a Ca-related cell wall degradation caused by localized Ca deficiencies due to reduced transpiration rates at high humidities.
Staub, Jack E., Rousos, P. and Esther Struckmeyer, B. (1988). "PILLOWY", A CALCIUM-RELATED FRUIT DISORDER IN PROCESSING CUCUMBER. Acta Hortic. 220, 309-316
DOI: 10.17660/ActaHortic.1988.220.42

Acta Horticulturae