The acquisition of phosphorus byLupinus albus L.

Gardner, W. K.; Parbery, D. G.; Barber, D. A.

doi:10.1007/bf02374724

Cited by 236 publications

(20 citation statements)

References 23 publications

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“…The effectiveness of organic anions in mobilizing P from soil is highlighted by studies with white lupin (Lupinus albus L.) which exudes significant amounts of citrate (and to some extent malate) from cluster roots that are formed in response to P deficiency (Dinlelaker et al 1989;Gardner et al 1983;Keerthisinghe et al 1998;Neumann and Martinoia 2002;Vance et al 2003). Citrate is effective in mobilizing orthophosphate from pools of soil P that are otherwise not available to plants that either do not exude, or show limited release of organic anions, such as soybean (Glycine max (L.) Merr.)…”

Section: Role Of Root Exudates In Phosphorus Mobilizationmentioning

confidence: 99%

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

et al. 2009

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International audienceThe rhizosphere is a complex environment where roots interact with physical, chemical and biological properties of soil. Structural and functional characteristics of roots contribute to rhizosphere processes and both have significant influence on the capacity of roots to acquire nutrients. Roots also interact extensively with soil microorganisms which further impact on plant nutrition either directly, by influencing nutrient availability and uptake, or indirectly through plant (root) growth promotion. In this paper, features of the rhizosphere that are important for nutrient acquisition from soil are reviewed, with specific emphasis on the characteristics of roots that influence the availability and uptake of phosphorus and nitrogen. The interaction of roots with soil microorganisms, in particular with mycorrhizal fungi and non-symbiotic plant growth promoting rhizobacteria, is also considered in relation to nutrient availability and through the mechanisms that are associated with plant growth promotion

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Section: Role Of Root Exudates In Phosphorus Mobilizationmentioning

confidence: 99%

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

et al. 2009

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“…For example, Lupinus albus could respond to P deficiency stress by forming cluster roots (Gardner et al, 1982) accompanied by high exudation of carboxylates, protons and acid phosphatase from such roots, which greatly enhanced P acquisition from soil (Tadano et al, 1993; Neumann et al, 1999; Yan et al, 2002; Shen et al, 2003; Vance et al, 2003; Lambers et al, 2006; Wang et al, 2007; Cheng et al, 2014). In addition, P uptake by Cicer arietinum exhibited a positive correlation with rate of carboxylate exudation into the rhizosphere (Veneklaas et al, 2003; Wouterlood et al, 2004; Rose et al, 2010) as well as with the activity of acid phosphatase (APase) extruded by roots (Li et al, 2004; Pearse et al, 2006b, 2007).…”

Section: Introductionmentioning

confidence: 99%

Major Crop Species Show Differential Balance between Root Morphological and Physiological Responses to Variable Phosphorus Supply

et al. 2016

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The relationship between root morphological and physiological responses to variable P supply in different plant species is poorly understood. We compared root morphological and physiological responses to P supply in seven crop species (Zea mays, Triticum aestivum, Brassica napus, Lupinus albus, Glycine max, Vicia faba, Cicer arietinum) treated with or without 100 mg P kg-1 in two soils (acidic and calcareous). Phosphorus deficiency decreased root length more in fibrous root species (Zea mays, Triticum aestivum, Brassica napus) than legumes. Zea mays and Triticum aestivum had higher root/shoot biomass ratio and Brassica napus had higher specific root length compared to legumes, whereas legumes (except soybean) had higher carboxylate exudation than fibrous root species. Lupinus albus exhibited the highest P-acquisition efficiency due to high exudation of carboxylates and acid phosphatases. Lupinus albus and Cicer arietinum depended mostly on root exudation (i.e., physiological response) to enhance P acquisition, whereas Zea mays, Triticum aestivum and Brassica napus had higher root morphology dependence, with Glycine max and Vicia faba in between. Principal component analysis using six morphological and six physiological responses identified root size and diameter as the most important morphological traits, whereas important physiological responses included carboxylate exudation, and P-acquisition and P-utilization efficiency followed by rhizosphere soil pH and acid phosphatase activity. In conclusion, plant species can be grouped on the basis of their response to soil P being primarily via root architectural or exudation plasticity, suggesting a potential benefit of crop-specific root-trait-based management to cope with variable soil P supply in sustainable grain production.

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“…The importance of contact surface maximization in the uptake of limiting nutrients is also a main issue for structures such as the cluster roots (Lambers et al 2006;Lambers et al 2008). Other structure-function studies also indicate that clustered surfaces are better designed for the concentration of root exudates than they are for the uptake of nutrients (Gardner et al 1982) (4) Shovels concentrate Ca + + intracellularly, and eventually these calcium mineral deposits grow into crystals that are unlikely to be re-used for further physiological functions, as the mature shovels dry and detach from the root. Moreover, the Ca content of H. coronarium stems and leaves is not different from that occurring in other legumes such as clover or alfalfa when grown in the same soil (Bolli 1951).…”

Section: Discussionmentioning

confidence: 97%

“…By comparison, root nodules develop on the same plant when induced by rhizobia, and contain (as in other legumes) peripheral rather than central vascular tissues (Squartini et al 1993). From both anatomical and aetiological standpoints, shovels also appear rather distinct from proteoid roots (Purnell 1960;Gardner et al 1982), referred to also as cluster roots Lamont 2003;Skene 2003;Shane and Lambers 2005), which are stacked clusters of rootlets formed in different plant species in response to P or Fe starvation. However, both shovels and cluster roots appear to share physiological clues in the context of solubilization of limiting nutrients (2) The shovels eventually develop an inward-curved "shovel-like" shape that is due to an asymmetrical distribution of cell volume of the cortical cells, being larger on the convex side.…”

Section: Discussionmentioning

confidence: 98%

Shovel roots: a unique stress-avoiding developmental strategy of the legume plant Hedysarum coronarium L.

et al. 2009

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Hedysarum coronarium (sulla) is a legume native to the Mediterranean basin, known for its broad tolerance to various environmental stresses, and its ability to thrive without signs of chlorosis when growing in arid and alkaline soils up to pH 9.6. A unique but poorly known morphological feature of its root system is the production of "shovels", modified lateral roots that acquire a curved and flattened shape. A combined structural and functional analysis was undertaken to define the nature and role of the shovel roots using various microscopy techniques, histochemical stains, STEM - energy dispersive X-ray microanalysis, infrared spectroscopy, and plant cultivation in different conditions. We found that sulla displays remarkable unique rhizosphere-buffering properties at both ends of the pH scale, and that shovels act as efficient calcium-absorbing organs that accumulate this cation intracellularly as insoluble crystalline salts. Such bioaccumulation results in a localized depletion of CaCO(3) from the soil. As a consequence of this removal of the pivotal carbonate buffering system, the iron-solubilizing acidification activities of the roots can become effective. Further tests revealed that the factor triggering shovel development is exposure of roots to iron oxide. This signal, reporting at once both iron presence and alkalinity, assures the availability of iron nutrient reserves upon acidification of the local microenvironment surrounding the roots. These findings, besides casting light on a novel and unique botanical phenomenon, offer the potential to exploit sulla's model and genes for the improvement of other crops to sustain productivity in a scenario of climate warming and increasing desertification

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The acquisition of phosphorus byLupinus albus L.

Cited by 236 publications

References 23 publications

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms

Major Crop Species Show Differential Balance between Root Morphological and Physiological Responses to Variable Phosphorus Supply

Shovel roots: a unique stress-avoiding developmental strategy of the legume plant Hedysarum coronarium L.

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