From lateral root density to nodule number, the strigolactone analogue GR24 shapes the root architecture of Medicago truncatula

Cuyper, Carolien de; Fromentin, Justine; Yocgo, Rosita Endah; Keyser, Annick de; Guillotin, Bruno; Kunert, K.; Boyer, François; Goormachtig, Sofie

doi:10.1093/jxb/erv227

Cited by 10 publications

(11 citation statements)

References 30 publications

(55 reference statements)

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“…Moreover, they showed that GR24 increased the nodule number in wild-type plants (Foo and Davies 2011). More recently, in Medicago truncatula it was shown that the effect of GR24 on nodule number is dose-dependent (De Cuyper et al 2015). De Cuyper and co-workers showed that low concentrations (0.1 μM) of GR24 had a positive effect, while higher concentrations negatively affected the number of nodules.…”

Section: Plant-microbe Interactionsmentioning

confidence: 99%

“…One of the functions of SLs below-ground is to regulate root development in response to phosphorus shortage (De Cuyper et al 2015;Kapulnik et al 2011a;Koltai 2011;Ruyter-Spira et al 2011). Interestingly, SL biosynthesis is promoted by P-limiting conditions (Table 1) (Foo et al 2013b;López-Ráez et al 2008a;Yoneyama et al 2007Yoneyama et al , 2012, and it has been suggested that they play a pivotal role as modulators of the coordinated development of roots and shoots under these unfavourable conditions.…”

Section: Sls and Root System Architecturementioning

confidence: 99%

“…Recently, a role for SLs in another important beneficial plant-microorganism association in the rhizosphere -nodulation -was described (Fig. 1) (De Cuyper et al 2015;Foo and Davies 2011;Soto et al 2010). Nodulation is established between legumes and certain rhizobacteria collectively known as rhizobia, and dates back about 60 million years (Garg and Geetanjali 2007).…”

Section: Plant-microbe Interactionsmentioning

confidence: 99%

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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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Section: Plant-microbe Interactionsmentioning

confidence: 99%

Section: Sls and Root System Architecturementioning

confidence: 99%

Section: Plant-microbe Interactionsmentioning

confidence: 99%

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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

View full text Add to dashboard Cite

show abstract

“…Strigolactones (SLs) are recently defined plant hormones with roles in mycorrhizal symbiosis and shoot and root architecture (Waters et al ). Application of low concentrations of GR24, a synthetic SLs analogue, to M. truncatula and pea could slightly induce nodule number (Soto et al ; Foo and Davies ; De Cuyper et al ), indicating that SLs exert a positive role in nodule formation in several legume species. However, high concentrations of GR24 strongly inhibited nodulation (De Cuyper et al ), suggesting that promotion of SLs in nodulation depends on an optimal range of SLs.…”

Section: Strigolactonesmentioning

confidence: 99%

“…Application of low concentrations of GR24, a synthetic SLs analogue, to M. truncatula and pea could slightly induce nodule number (Soto et al ; Foo and Davies ; De Cuyper et al ), indicating that SLs exert a positive role in nodule formation in several legume species. However, high concentrations of GR24 strongly inhibited nodulation (De Cuyper et al ), suggesting that promotion of SLs in nodulation depends on an optimal range of SLs. SLs biosynthesis genes can also be induced by S. meliloti or NFs (Breakspear et al ).…”

Section: Strigolactonesmentioning

confidence: 99%

Hormone modulation of legume‐rhizobial symbiosis

Liu

Zhang

Yang

et al. 2018

JIPB

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Leguminous plants can establish symbiotic associations with diazotropic rhizobia to form nitrogen-fixating nodules, which are classified as determinate or indeterminate based on the persistence of nodule meristem. The formation of nitrogen-fixing nodules requires coordinating rhizobial infection and root nodule organogenesis. The formation of an infection thread and the extent of nodule formation are largely under plant control, but vary with environmental conditions and the physiological state of the host plants. Many achievements in these two areas have been made in recent decades. Phytohormone signaling pathways have gradually emerged as important regulators of root nodule symbiosis. Cytokinin, strigolactones (SLs) and local accumulation of auxin can promote nodule development. Ethylene, jasmonic acid (JA), abscisic acid (ABA) and gibberellic acid (GA) all negatively regulate infection thread formation and nodule development. However, salicylic acid (SA) and brassinosteroids (BRs) have different effects on the formation of these two nodule types. Some peptide hormones are also involved in nodulation. This review summarizes recent findings on the roles of these plant hormones in legume-rhizobial symbiosis, and we propose that DELLA proteins may function as a node to integrate plant hormones to regulate nodulation.

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Role of soil abiotic processes on phosphorus availability and plant responses with a focus on strigolactones in tomato plants

Santoro,

Schiavon,

Celi

2023

Plant Soil

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Background Phosphorus (P) is an essential nutrient for plant growth, taking part in primary cellular metabolic processes as a structural component of key biomolecules. Soil processes as adsorption, precipitation, and coprecipitation can affect P bioavailability, leading to limited plant growth and excessive use of P fertilizers, with adverse impacts on the environment and progressive depletion of P reserves. To cope with P stress, plants undergo several growth, development, and metabolic adjustments, aimed at increasing P-acquisition and -utilization efficiency. Recently, strigolactones (SLs) have emerged as newly defined hormones that mediate multiple levels of morphological, physiological and biochemical changes in plants as part of the P acclimation strategies to optimize growth. Therefore, understanding the soil processes affecting P availability and P acquisition strategies by plants can contribute to improved agronomical practices, resources optimization and environmental protection, and the development of plants with high P use efficiency for enhanced agricultural productivity. Scope In this review, we discuss the range of abiotic processes that control P retention in soil and how different concentrations or degrees of P bioavailability can trigger various responses in plants, while critically highlighting the inconsistent conditions under which experiments evaluating aspects of P nutrition in plants have been conducted. We also present recent advances in elucidating the role of SLs in the complex P signalling pathway, with a special focus on what has been discovered so far in the model plant tomato (Solanum lycopersicum L.).

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From lateral root density to nodule number, the strigolactone analogue GR24 shapes the root architecture of Medicago truncatula

Cited by 10 publications

References 30 publications

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

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

Hormone modulation of legume‐rhizobial symbiosis

Role of soil abiotic processes on phosphorus availability and plant responses with a focus on strigolactones in tomato plants

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