Sugar Signaling in Root Responses to Low Phosphorus Availability

Hammond, John P.; White, Philip J.

doi:10.1104/pp.111.175380

Cited by 165 publications

(117 citation statements)

References 107 publications

(162 reference statements)

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“…The enhanced PM H + -ATPase activity, increased organic acid exudation, and augmented root biomass displayed by 35Sp:AVP1 or 35Sp:AVP1D plants are consistent with an increased sugar supply, as described by Hammond and White (2011) and documented in genetically modified ZmPTF1 maize plants (Li et al, 2011). Of note, an elegant stem-girdling experiment showed that white lupin required phloem sugar transport for the expression of Pi deficiency-induced genes in cluster roots (Liu et al, 2005).…”

Section: The Sugar and Phosphate Connectionmentioning

confidence: 73%

Genetic Manipulation of a “Vacuolar” H+-PPase: From Salt Tolerance to Yield Enhancement under Phosphorus-Deficient Soils

et al. 2012

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Section: The Sugar and Phosphate Connectionmentioning

confidence: 73%

Genetic Manipulation of a “Vacuolar” H+-PPase: From Salt Tolerance to Yield Enhancement under Phosphorus-Deficient Soils

et al. 2012

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“…Under P starvation, more sucrose is allocated to the root system, allowing extensive growth and changing the shoot-root ratio for biomass in most plants [37]. However, sucrose is not only an energy source, but also a signalling compound (e.g., [38,39]). Two reports have shown that in Lupinus albus cluster roots are formed in the presence of sufficient P supply when sucrose is supplied to the medium [34,40].…”

Section: The Role Of Phytohormones and Sugars In Cluster-root Formationmentioning

confidence: 99%

Plant adaptations to severely phosphorus-impoverished soils

Lambers

Martinoia

Renton

2015

Current Opinion in Plant Biology

172

121

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Mycorrhizas play a pivotal role in phosphorus (P) acquisition of plant roots, by enhancing the soil volume that can be explored. Non-mycorrhizal plant species typically occur either in relatively fertile soil or on soil with a very low P availability, where there is insufficient P in the soil solution for mycorrhizal hyphae to be effective. Soils with a very low P availability are either old and severely weathered or relatively young with high concentrations of oxides and hydroxides of aluminium and iron that sorb P. In such soils, cluster roots and other specialised roots that release P-mobilising carboxylates are more effective than mycorrhizas. Cluster roots are ephemeral structures that release carboxylates in an exudative burst. The carboxylates mobilise sparingly-available sources of soil P. The relative investment of biomass in cluster roots and the amount of carboxylates that are released during the exudative burst differ between species on severely weathered soils with a low total P concentration and species on young soils with high total P concentrations but low P availability. Taking a modelling approach, we explore how the optimal cluster-root strategy depends on soil characteristics, thus offering insights for plant breeders interested in developing crop plants with optimal cluster-root strategies. DOI: https://doi.org/10.1016/j.pbi. 2015.04.002 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-121418 Accepted Version Originally published at: Lambers, Hans; Martinoia, Enrico; Renton, Michael (2015). Plant adaptations to severely phosphorusimpoverished soils. Current Opinion in Plant Biology,[25][26][27][28][29][30][31] AbstractMycorrhizas play a pivotal role in phosphorus (P) acquisition of plant roots, by enhancing the soil volume that can be explored. Non-mycorrhizal plant species typically occur either in relatively fertile soil or on soil with a very low P availability, where there is insufficient P in the soil solution for mycorrhizal hyphae to be effective. Soils with a very low P availability are either old and severely weathered or relatively young with high concentrations of oxides and hydroxides of aluminium and iron that sorb P. In such soils, cluster roots and other specialised roots that release P-mobilising carboxylates are more effective than mycorrhizas. Cluster roots are ephemeral structures that release carboxylates in an exudative burst. The carboxylates mobilise sparingly-available sources of soil P. The relative investment of biomass in cluster roots and the amount of carboxylates that are released during the exudative burst differ between species on severely weathered soils with a low total P concentration and species on young soils with high total P concentrations but low P availability. Taking a modelling approach, we explore how the optimal cluster-root strategy depends on soil characteristics, thus offering insights for plant breeders interested in developing crop plants with optimal cluster-root strat...

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“…Sugars synthesized in the green parts of plants are known to have important roles as signaling molecules in addition to their metabolic functions (16)(17)(18), for example, acting as a systemic signal for promoting root development in response to phosphorus starvation (19). We tested the hypothesis that the light stimulus emerging in the cotyledons and transmitted to the root is photosynthetically produced sugar.…”

mentioning

confidence: 99%

Photosynthetic sucrose acts as cotyledon-derived long-distance signal to control root growth during early seedling development in Arabidopsis

Kircher

Schöpfer

2012

Proc. Natl. Acad. Sci. U.S.A.

221

181

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The most hazardous span in the life of green plants is the period after germination when the developing seedling must reach the state of autotrophy before the nutrients stored in the seed are exhausted. The need for an economically optimized utilization of limited resources in this critical period is particularly obvious in species adopting the dispersal strategy of producing a large amount of tiny seeds. The model plant Arabidopsis thaliana belongs to this category. Arabidopsis seedlings promote root development only in the light. This response to light has long been recognized and recently discussed in terms of an organ-autonomous feature of photomorphogenesis directed by the red/blue light absorbing photoreceptors phytochrome and cryptochrome and mediated by hormones such as auxin and/or gibberellin. Here we show that the primary root of young Arabidopsis seedlings responds to an interorgan signal from the cotyledons and that phloem transport of photosynthesis-derived sugar into the root tip is necessary and sufficient for the regulation of root elongation growth by light.

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Sugar Signaling in Root Responses to Low Phosphorus Availability

Abstract: Over the last decade, major advances have been made in our understanding of how plants sense, signal, and respond to soil phosphorus (P) availability (Amtmann et al

Cited by 165 publications

References 107 publications

Genetic Manipulation of a “Vacuolar” H+-PPase: From Salt Tolerance to Yield Enhancement under Phosphorus-Deficient Soils

Genetic Manipulation of a “Vacuolar” H+-PPase: From Salt Tolerance to Yield Enhancement under Phosphorus-Deficient Soils

Plant adaptations to severely phosphorus-impoverished soils

Photosynthetic sucrose acts as cotyledon-derived long-distance signal to control root growth during early seedling development in Arabidopsis

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