Increased citrate efflux due to the SA treatment was associated with decreased inhibition of root growth and Al content in root tips, suggesting that exogenous SA could confer Al tolerance by increasing citrate efflux.
tora is proposed: treatments with SA promoted the Al-induced increase in citrate efflux, and this resulted in the decreased accumulation of Al in root tips, thereby causing a limited oxidative stress and root growth inhibition.
Citrate efflux from cluster roots of L.?luteus showed a diurnal pattern, similar to that reported for L.?albus, with maximum efflux during the day, and declining to a minimum before dawn.
Citrate efflux by L.?hispanicus and L.?luteus was at least comparable to that reported for P-deficient L.?albus[up to 1.092?nmol?g-1 fresh weight (FW) s-1], but was over an order of magnitude lower in L.?mutabilis (0.036?nmol?g-1?FW?s-1).
Consistent with a lack of effect on citrate efflux, the increase in citrate synthase activity did not enhance the aluminium resistance of the transgenic lines.
Under severe nutrient stress, however, the rates of malate and citrate efflux from the root increased 33 and 12 fold respectively.
Citrate efflux in glucose-limited and glucose-sufficient chemostat culture of Penicillium simplicissium