Changes in the cell walls of A. arguta var. Hortgem Tahi were assessed through histological, immunolocalisation and cell wall composition analyses. Hortgem Tahi kiwis are bite-sized and have a skin that is considered edible by consumers consisting of a cuticle, living epidermis and a hypodermis of tightly-packed thin-walled cells containing condensed phenolic material. Beneath is the outer pericarp with large and small parenchyma cells followed by the inner pericarp with seed-containing locules, and a core tissue consisting of small tightly-packed parenchyma cells. A large number of mucilage-containing cells is spread throughout the fruit.
Analyses on the composition of cell walls showed that galactose loss and pectin solubilisation start at an earlier firmness stage compared to Hayward, which takes about thirty days to soften.
Source: Sutherland Paul W., Fullerton Christina G., Schröder Roswitha, Hallett Ian C., 'Cell wall changes in Actinidia arguta during softening', 2017, Scientia Horticulturae, Vol. 226, pag. 173-183.