Effects of phosphate availability on the root system architecture: large‐scale analysis of the natural variation between <i>Arabidopsis</i> accessions

Chevalier, François; Pata, M.; Nacry, Philippe; Doumas, Patrick; Rossignol, Michel

doi:10.1046/j.1365-3040.2003.01100.x

Cited by 116 publications

(113 citation statements)

References 28 publications

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“…A major developmental response of plants to Pi limitation is changing root architecture, which includes the inhibition of primary root growth and the formation of more and longer lateral roots (Chevalier et al 2003). These morphological changes together with the enhanced production of root hairs are thought to increase the surface area for Pi absorption.…”

Section: Discussionmentioning

confidence: 99%

Improved phosphate metabolism and biomass production by overexpression of AtPAP18 in tobacco

et al. 2012

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Limited availability of phosphate ion (Pi) reduces plant growth in natural ecosystems. Here, we report the functional effects of overexpressing an Arabidopsis thaliana purple acid phosphatase encoding gene, AtPAP18, in Nicotiana tabbacum as a crop model plant. Transgenic tobacco plants exhibited significant increases in acid phosphatase activity, total P and Pi contents leading to improved biomass production in both Pi-deficient and Pi-sufficient conditions. Transient expression of AtPAP18::green fluorescent fusion protein in onion epidermal cells indicated that AtPAP18 is a dual-targeted protein, which is detected mainly in the apoplast of the cells after 24 h and in the vacuole after 72 h. Possibly, AtPAP18 protein confers efficient retrieval of Pi from bonded extracellular compounds as well as expendable intracellular Pi-monoesters and anhydrides. These data clearly indicate that overexpression of AtPAP18 gene offers an effective approach for reducing the consumption of chemical Pi fertilizer through increased acquisition of soil Pi and mobilization of internal resources.

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Section: Discussionmentioning

confidence: 99%

Improved phosphate metabolism and biomass production by overexpression of AtPAP18 in tobacco

et al. 2012

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“…However, we should be careful with generalizing root architectural changes when only studying one specific ecotype or variety for each species. For instance, various Arabidopsis ecotypes displayed a different root architectural response to low P conditions, suggesting that there is natural variation for this response and that it is genetically determined (Chevalier et al 2003). In Arabidopsis, in the presence of sufficient P, SLs have a suppressive effect on lateral root formation (Fig.…”

Section: Sls and Root System Architecturementioning

confidence: 99%

Ecological relevance of strigolactones in nutrient uptake and other abiotic stresses, and in plant-microbe interactions below-ground

Andreo-Jiménez¹,

Ruyter-Spira

Bouwmeester

et al. 2015

Plant Soil

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Background Plants are exposed to ever changing and often unfavourable environmental conditions, which cause both abiotic and biotic stresses. They have evolved sophisticated mechanisms to flexibly adapt themselves to these stress conditions. To achieve such adaptation, they need to control and coordinate physiological, developmental and defence responses. These responses are regulated through a complex network of interconnected signalling pathways, in which plant hormones play a key role. Strigolactones (SLs) are multifunctional molecules recently classified as a new class of phytohormones, playing a key role as modulators of the coordinated plant development in response to nutrient deficient conditions, especially phosphorus shortage. Belowground, besides regulating root architecture, they also act as molecular cues that help plants to communicate with their environment. Scope This review discusses current knowledge on the different roles of SLs below-ground, paying special attention to their involvement in phosphorus uptake by the plant by regulating root architecture and the establishment of mutualistic symbiosis with arbuscular mycorrhizal fungi. Their involvement in plant responses to other abiotic stresses such as drought and salinity, as well as in other plant-(micro)organisms interactions such as nodulation and root parasitic plants are also highlighted. Finally, the agronomical implications of SLs below-ground and their potential use in sustainable agriculture are addressed. Conclusions Experimental evidence illustrates the biological and ecological importance of SLs in the rhizosphere. Their multifunctional nature opens up a wide range of possibilities for potential applications in agriculture. However, a more in-depth understanding on the SL functioning/signalling mechanisms is required to allow us to exploit their full potential.

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“…In Arabidopsis, Pi limitation attenuates primary root growth and stimulates lateral root formation, which is thought to maximize Pi acquisition in the topsoil (8,9). A genetic approach to dissect Pi sensing identified Arabidopsis mutants (10,11) and accessions (12,13) with altered sensitivity to the inhibitory effect of Pi deprivation on primary root growth. Characterization of a major quantitative trait locus for root length, low phosphate root 1 (lpr1), revealed a role for multicopper oxidases (LPR1, LPR2) in Pi sensing at the root tip (13,14).…”

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confidence: 99%

ER-resident proteins PDR2 and LPR1 mediate the developmental response of root meristems to phosphate availability

Ticconi

Lucero

Sakhonwasee

et al. 2009

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

239

247

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Inadequate availability of inorganic phosphate (Pi) in the rhizosphere is a common challenge to plants, which activate metabolic and developmental responses to maximize Pi acquisition. The sensory mechanisms that monitor environmental Pi status and regulate root growth via altered meristem activity are unknown. Here, we show that PHOSPHATE DEFICIENCY RESPONSE 2 (PDR2) encodes the single P 5-type ATPase of Arabidopsis thaliana. PDR2 functions in the endoplasmic reticulum (ER) and is required for proper expression of SCARECROW (SCR), a key regulator of root patterning, and for stem-cell maintenance in Pi-deprived roots. We further show that the multicopper oxidase encoded by LOW PHOSPHATE ROOT 1 (LPR1) is targeted to the ER and that LPR1 and PDR2 interact genetically. Because the expression domains of both genes overlap in the stemcell niche and distal root meristem, we propose that PDR2 and LPR1 function together in an ER-resident pathway that adjusts root meristem activity to external Pi. Our data indicate that the Pi-conditional root phenotype of pdr2 is not caused by increased Fe availability in low Pi; however, Fe homeostasis modifies the developmental response of root meristems to Pi availability.multicopper oxidase ͉ P5-type ATPase ͉ phosphate deficiency ͉ root development ͉ SCARECROW

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Effects of phosphate availability on the root system architecture: large‐scale analysis of the natural variation between Arabidopsis accessions

Cited by 116 publications

References 28 publications

Improved phosphate metabolism and biomass production by overexpression of AtPAP18 in tobacco

Improved phosphate metabolism and biomass production by overexpression of AtPAP18 in tobacco

Ecological relevance of strigolactones in nutrient uptake and other abiotic stresses, and in plant-microbe interactions below-ground

ER-resident proteins PDR2 and LPR1 mediate the developmental response of root meristems to phosphate availability

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