https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17941 Wed 11 Apr 2018 12:58:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26381 Wed 11 Apr 2018 11:50:23 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1676 (fructose ≈ glucose)] and hexoses competed with sucrose. Concentration-dependent influxes of all three sugars by excised seed coats could be described by a simple directly proportional relationship between concentration ([S]) and uptake rate (v) in the physiological range of sugar concentrations (v ≈ A.[S]). Alternatively, with the exception of fructose influx by Vicia, all could be fitted to a Michaelis-Menten relationship, as could sucrose uptake by Vicia protoplasts. Apparent K{subscript m} values were high (≈ 100–500 mM) compared with those reported for other systems. Sucrose transport was distinct from glucose and fructose transport in both species. Sugar influx was decreased by p-chloromercuribenzenesulfonic acid, carbonylcyanide m-chlorophenylhydrazone and erythrosin B. These responses are consistent with sugar/H⁺ symport acting to retrieve photoassimilates leaked to the apoplasm during post-sieve element transport within seed coats.]]> Sat 24 Mar 2018 08:30:26 AEDT ]]>