Cooperation of a 'Davies Type' Biochemical pH-Stat and the Tonoplastic Bioosmotic pH-Stat in the Regulation of the Cytosolic pH of Hevea Latex

The latex from Hevea brasiliensis is a fluid cytoplasm which is expelled from wounded laticiferous vessels (i.e.: articulated, anastomosed cells) (Archer et al, 1963) . It contains a vacuolar compartment: the so-called “lutoids”, consisting of microvacuoles with lysosomal characteristics, which can be easily isolated and purified by simple centrifugation (Pujarniscle, 1968; Ribaillier et al, 1971; d’Auzac et al, 1982).