Boron uptake by peach leaf slices

Selection and partial characterization of a boron-tolerant tobacco cell line

“…Bowen (1981) suggested that B uptake is a multiphasic, metabolically dependent, and carrier-mediated process. Shu and Wu (1991) showed that the B uptake involves both active and passive processes. Raven (1980) stated that B absorption is predominantly a passive process with a small metabolic component.…”

“…In view of its dependence on energy, carriers, inhibitors, temperature, and other environmental factors, B uptake and translocation have been considered to be active, metabolic-dependent, and carrier-mediated (Bowen 1981) or to involve a mixture of active and passive processes (Raven 1980;Shu and Wu 1991). In other studies Nable et al 1997;Dannel et al 1999), it was assumed that B uptake involves a process of passive diffusion, which is facilitated in part by the formation of non-exchangeable B complexes within the cytoplasm (water-soluble fraction) and cell wall (water-insoluble fraction).…”