Arbuscular mycorrhizal symbiosis decreases strigolactone production in tomato

López‐Ráez, Juan Antonio; Charnikhova, Tatsiana; Fernández, I.; Bouwmeester, Harro J.; Pozo, Marı́a J.

doi:10.1016/j.jplph.2010.08.011

Cited by 128 publications

(75 citation statements)

References 24 publications

(33 reference statements)

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“…Similarly, exudates from AMcolonized lettuce, pea, and tomato plants induced less germination of Orobanche and Phelipanche spp. seeds compared with non-colonized plants (Aroca et al 2013;Fernández-Aparicio et al 2010;López-Ráez et al 2011a). In the case of tomato, it was shown that this reduced germination was caused by a decrease in the production of SLs and that this depends on a fully established symbiosis (López-Ráez et al 2011a).…”

Section: Am Symbiosis To Control Root Parasitic Plantsmentioning

confidence: 99%

“…seeds compared with non-colonized plants (Aroca et al 2013;Fernández-Aparicio et al 2010;López-Ráez et al 2011a). In the case of tomato, it was shown that this reduced germination was caused by a decrease in the production of SLs and that this depends on a fully established symbiosis (López-Ráez et al 2011a). This down-regulation of SL production likely represents a mechanism to prevent excessive colonisation that could be metabolically costly for the plant, a mechanism known as autoregulation (Staehelin et al 2011).…”

Section: Am Symbiosis To Control Root Parasitic Plantsmentioning

confidence: 99%

See 1 more Smart Citation

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: Am Symbiosis To Control Root Parasitic Plantsmentioning

confidence: 99%

Section: Am Symbiosis To Control Root Parasitic Plantsmentioning

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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“…Strigolactones serve as signalling molecules for the establishment of a symbiotic relationship between arbuscular mycorrhizal fungi and host plants (Akiyama et al 2005;Besserer et al 2006;Foo et al 2013aFoo et al , 2013b. Since strigolactones are widely distributed in the plant kingdom (see reviews (García-Garrido et al 2009;Yoneyama et al 2009;Delaux et al 2012), it has been speculated that this group of phytohormones might also be involved in the signalling of other plant-microbe interactions in the rhizosphere (López-Ráez et al 2010). Furthermore, strigolactones have been shown to impact the establishment of Rhizobium-legume symbiosis Foo and Davies 2011;Foo et al 2013aFoo et al , 2013b.…”

Section: Discussionmentioning

confidence: 99%

“…We have observed variability in the onset of swarming between experiments, thus when treatments are compared with the control, the swarm plates are prepared on the same day. Plant strigolactones have been suggested as potential signalling compounds that can be perceived by rhizosphere microbes, in addition to their roles in general plant physiology (Akiyama et al 2005;Besserer et al 2006;López-Ráez et al 2010). To investigate the possible role of moss strigolactone in the promotion of swarming motility in R. leguminosarum, crude extracts from a strigolactone-deficient moss strain (Ppccd8⌬) were included in the assays.…”

Section: Moss Extract Promoted Swarming Motility In R Leguminosarummentioning

confidence: 99%

Legume seed exudates and Physcomitrella patens extracts influence swarming behavior in Rhizobium leguminosarum

et al. 2014

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Plants are known to secrete chemical compounds that can change the behavior of rhizosphere-inhabiting bacteria. We investigated the effects of extracts from legume host plants on the swarming behavior of Rhizobium leguminosarum bv. viciae. We also investigated the effects on swarming when Rhizobium is exposed to extracts from an ancestor to vascular plants, the model bryophyte Physcomitrella patens. Lentil and faba bean seed exudates enhanced and inhibited swarming motility, respectively, whereas pea seed exudates had no observable effect on swarming. Swarming was also enhanced by the moss extracts. Exposure to lentil seed exudates and the moss extract increased flaA expression 2-fold, while faba bean seed exudates exposure decreased expression 3-fold, suggesting that the swarming effect could, in part, be due to regulation of flagellin gene expression. However, the exudates and extracts did not significantly affect flaA gene expression in planktonic motile cells, indicating that the response to flagellar regulation is specific to a physiology unique to the swarming cell. Transmission electron microscopy demonstrated that addition of the lentil seed exudate and the moss extract results in earlier differentiation into swarmer cells, which could contribute to the development of a larger swarming surface area. To gain further mechanistic insight into the effect of the moss extract on swarming, a moss strigolactone-deficient mutant (Ppccd8⌬) was tested. A reduction in the promotive effect was observed, suggesting that the plant hormone strigolactone may be a signalling molecule activating swarming motility in R. leguminosarum.Key words: Rhizobium, swarming motility, plant extracts. Résumé :Les plantes sont reconnues pour sécréter des composés chimiques qui modifient le comportement des bactéries vivant en rhizosphère. Nous avons examiné l'impact d'extraits de plantes légumineuses hôtes sur l'essaimage de Rhizobium leguminosarum bv. viciae. Nous avons également examiné la modulation de l'essaimage lorsque Rhizobium était exposé à des extraits d'un ancêtre des plantes vasculaires, la bryophyte modèle Physcomitrella patens. Des exsudats de graines de lentille et de féveroles ont respectivement stimulé et inhibé l'essaimage, alors que des exsudats de graines de pois n'ont pas eu d'effet notable. L'essaimage a aussi été stimulé par des extraits de mousse. L'exposition aux exsudats de graines de lentille et à l'extrait de mousse a doublé l'expression de flaA alors que les exsudats de graines de féveroles l'ont diminué des deux tiers, ce qui indique que l'effet sur l'essaimage pourrait être partiellement attribuable à la régulation de l'expression du gène de la flagelline. Or, les exsudats et extraits n'ont pas eu d'incidence significative sur l'expression du gène flaA chez les cellules planctoniques motiles, ce qui indique que la réponse en termes de régulation flagellaire n'opérerait que grâce à une physiologie particulière de la cellule en essaimage. La microscopie électronique par transmission a démontré que ...

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“…seed germination to a lesser extent than the induction obtained by exudates of nonmycorrhitic plants (Lendzemo et al, 2009;Fernández-Aparicio et al, 2010). Moreover, strigolactone production was shown to be significantly reduced in roots of mycorrhitic tomato plants (López-Ráez et al, 2011). Therefore, strigolactones may be negatively regulated by AMF through a feedback loop.…”

Section: Mycorrhizal Symbiosismentioning

confidence: 92%

Strigolactone Involvement in Root Development, Response to Abiotic Stress, and Interactions with the Biotic Soil Environment

2014

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Strigolactones, recently discovered as plant hormones, regulate the development of different plant parts. In the root, they regulate root architecture and affect root hair length and density. Their biosynthesis and exudation increase under low phosphate levels, and they are associated with root responses to these conditions. Their signaling pathway in the plant includes protein interactions and ubiquitin-dependent repressor degradation. In the root, they lead to changes in actin architecture and dynamics as well as localization of the PIN-FORMED auxin transporter in the plasma membrane. Strigolactones are also involved with communication in the rhizosphere. They are necessary for germination of parasitic plant seeds, they enhance hyphal branching of arbuscular mycorrhizal fungi of the Glomus and Gigaspora spp., and they promote rhizobial symbiosis. This review focuses on the role played by strigolactones in root development, their response to nutrient deficiency, and their involvement with plant interactions in the rhizosphere.

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Arbuscular mycorrhizal symbiosis decreases strigolactone production in tomato

Cited by 128 publications

References 24 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

Legume seed exudates and Physcomitrella patens extracts influence swarming behavior in Rhizobium leguminosarum

Strigolactone Involvement in Root Development, Response to Abiotic Stress, and Interactions with the Biotic Soil Environment

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