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Physiological adaptations to phosphorus deficiency during proteoid root development in white lupin
It is demonstrated that increased accumulation and exudation of citric acid and a concomitant release of protons were predominantly restricted to mature root clusters in the later stages of P deficiency, suggesting the induction of a high-affinity Pi-uptake system. Expand
Citric acid excretion and precipitation of calcium citrate in the rhizosphere of white lupin (Lupinus albus L.)
The strong acidification of the rhizosphere and the cation/anion uptake ratio of the plants strongly suggests that proteoid roots of white lupin excrete citric acid, rather than citrate, into the Rhizosphere leading to intensive chemical extraction of a limited soil volume. Expand
Root excretion of carboxylic acids and protons in phosphorus-deficient plants
The results suggest that P deficiency-induced exudation of carboxylic acids depends on the ability to accumulate carboxYlic acids in the root tissue, which in turn is determined by biosynthesis, degradation and partitioning of car boxylic acid or related precursors between roots and shoot. Expand
Evidence for a specific uptake system for iron phytosiderophores in roots of grasses.
The results indicate the existence of a specific uptake system for Fe(III)phytosiderophores in roots of barley and all other graminaceous species and two strategies are evident for the acquisition of iron by plants under iron deficiency. Expand
Boron deficiency-induced impairments of cellular functions in plants
Evidence shows that the levels of ascorbic acid, non-protein SH-compounds and glutathione reductase, the major defence systems of cells against toxic O2 species, are reduced in response to B deficiency, and increasing evidence that B is involved in protection of nitrogenase activity against O2 damage. Expand
Boron in Plant Biology
Careful consideration of the physical and chemical properties of B in biological systems, and of the experimental data from both plants and animals suggests that B plays a critical role in membrane structure and hence function. Expand
Physiological Aspects of Cluster Root Function and Development in Phosphorus-deficient White Lupin (Lupinus albus L.)
Cluster root formation in white lupin is induced mainly by phosphorus (P) starvation, and seems to be regulated by the endogenous P status of the plant, and inhibitory effects of kinetin application suggest the involvement of endogenous phytohormones (auxins and cytokinins), which may act in an antagonistic manner in the P-starvation response. Expand
Strategies of plants for acquisition of iron
Two different types of root response to Fe deficiency (strategies) have been identified in species of the Plant Kingdom. In Strategy I which occurs in all plant species except grasses, a plasmaExpand
Different strategies in higher plants in mobilization and uptake of iron
Abstract Higher plants differ considerably in their capability for mobilization of iron in the rhizospere of soils with low iron availability. In the plant kingdom at least two different StrategiesExpand