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Main conclusion The accumulation of NH4+ in response to Fe deficiency plays a role not only in the remobilization of Fe from the root cell wall, but also in the transportation of Fe from root to shoot. Abstract Ammonium (NH4+) plays an important role in phosphorus-deficiency responses in rice, but its role in responses to Fe deficiency remains unknown. Here, we demonstrate that the accumulation...
Main conclusion NO3− not only inhibited the reutilization of cell wall P via decreasing root cell wall pectin content and PME activity, but also hampered the P translocation from root to shoot.The rice cultivars ‘Kasalath’ (Kas) and ‘Nipponbare’ (Nip) were used to demonstrate that the nitrogen source NO3− inhibits internal phosphorus (P) reutilization in rice under P-absence conditions. Analysis using...
The physiological and molecular mechanisms leading to the competitive interactions between phosphorus (P) and metal elements are a matter of debate. In this study, we found that P deficiency can alleviate cadmium (Cd) toxicity in Arabidopsis thaliana (Col-0). Under P deficiency (−P), less Cd was accumulated in the plants and the root cell walls, indicating the operation of a P-deficiency-induced Cd...
We demonstrated that aluminum (Al)-induced oxalate secretion and plasma membrane (PM) H+-ATPase activity in tomato (Lycopersicon esculentum ‘Hezuo903’) roots were poorly correlated. In addition, vanadate, an inhibitor of PM H+-ATPase, had no effect on Al-induced oxalate secretion, but significantly inhibited enzyme activity. An anion channel inhibitor phenylglyoxal inhibited oxalate secretion, but...
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