Aim of the present work was to assess the capability of two perennial grasses (Poa pratensis L. and Festuca rubra L.) to improve Fe uptake by the highly-susceptible citrus rootstock citrumelo "Swingle". Citrus plants were unable to induce the physiological responses to Fe-deficiency; however, in these plants uptake of 59Fe from 59Fe-hydroxide could be increased by the presence of Fe-deficient grasses. No beneficial effect was observed with the use Fe-sufficient grasses. A progressive increase in 59Fe uptake by citrus plants was also evident after supplying increasing amounts of DMA, the major phytosiderofore (PS) released by grasses. Re-greening of Fe-deficient citrus plants was obtained by intercropping with grasses in rhizoboxes filled with a chlorosis-inducing calcareous soil; a concomitant increase in the amount of Fe in the leachates was also observed. Data indicate that Fe nutrition of a Fe-inefficient citrus rootstock can benefit from Fe mobilized by PS released by perennial graminaceous species.
Cesco S., Rombolà A.D., Tagliavini M., Varanini M., Pinton R. (2005). Root exudates of grasses improve Fe uptake in a citrus rootstock sensitive to Fe-deficiency. BEIJING : Tsingua University Press.
Root exudates of grasses improve Fe uptake in a citrus rootstock sensitive to Fe-deficiency
ROMBOLA', ADAMO DOMENICO;TAGLIAVINI, MASSIMO;
2005
Abstract
Aim of the present work was to assess the capability of two perennial grasses (Poa pratensis L. and Festuca rubra L.) to improve Fe uptake by the highly-susceptible citrus rootstock citrumelo "Swingle". Citrus plants were unable to induce the physiological responses to Fe-deficiency; however, in these plants uptake of 59Fe from 59Fe-hydroxide could be increased by the presence of Fe-deficient grasses. No beneficial effect was observed with the use Fe-sufficient grasses. A progressive increase in 59Fe uptake by citrus plants was also evident after supplying increasing amounts of DMA, the major phytosiderofore (PS) released by grasses. Re-greening of Fe-deficient citrus plants was obtained by intercropping with grasses in rhizoboxes filled with a chlorosis-inducing calcareous soil; a concomitant increase in the amount of Fe in the leachates was also observed. Data indicate that Fe nutrition of a Fe-inefficient citrus rootstock can benefit from Fe mobilized by PS released by perennial graminaceous species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
