The role of strigolactones in root development

Sun, Huwei; Tao, Jiang; Gu, Pengyuan; Xu, Guohua; Zhang, Yali

doi:10.1080/15592324.2015.1110662

Cited by 52 publications

(23 citation statements)

References 27 publications

(39 reference statements)

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“…Little is known of the role of a recently characterised set of phytohormones, strigolactones (SLs; Roy and Bassham, ), and related smoked‐derived butenolides, karrikins (KARs; Flematti et al ., ), or the as‐yet unidentified endogenous ligands of the KAI2 (KARRIKIN INSENSITIVE) KAR receptor [KAI2‐ligand (KL); Sun et al ., ]. Given the role of SLs in regulating root system architecture (Ruyter‐Spira et al ., ; Mayzlish‐Gati et al ., ; Rasmussen et al ., , ; Kapulnik and Koltai, ; Sun et al ., , ; Jiang et al ., ; Matthys et al ., ) and affecting auxin transport (Crawford et al ., ; Shinohara et al ., ), it would be interesting to test their role in root skewing.…”

Section: Introductionmentioning

confidence: 99%

Impairment in karrikin but not strigolactone sensing enhances root skewing in Arabidopsis thaliana

et al. 2019

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Summary Roots form highly complex systems varying in growth direction and branching pattern to forage for nutrients efficiently. Here mutations in the KAI2 (KARRIKIN INSENSITIVE) α/β‐fold hydrolase and the MAX2 (MORE AXILLARY GROWTH 2) F‐box leucine‐rich protein, which together perceive karrikins (smoke‐derived butenolides), caused alteration in root skewing in Arabidopsis thaliana. This phenotype was independent of endogenous strigolactones perception by the D14 α/β‐fold hydrolase and MAX2. Thus, KAI2/MAX2 effect on root growth may be through the perception of endogenous KAI2‐ligands (KLs), which have yet to be identified. Upon perception of a ligand, a KAI2/MAX2 complex is formed together with additional target proteins before ubiquitination and degradation through the 26S proteasome. Using a genetic approach, we show that SMAX1 (SUPPRESSOR OF MAX2‐1)/SMXL2 and SMXL6,7,8 (SUPPRESSOR OF MAX2‐1‐LIKE) are also likely degradation targets for the KAI2/MAX2 complex in the context of root skewing. In A. thaliana therefore, KAI2 and MAX2 act to limit root skewing, while kai2's gravitropic and mechano‐sensing responses remained largely unaffected. Many proteins are involved in root skewing, and we investigated the link between MAX2 and two members of the SKS/SKU family. Though KLs are yet to be identified in plants, our data support the hypothesis that they are present and can affect root skewing.

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Section: Introductionmentioning

confidence: 99%

Impairment in karrikin but not strigolactone sensing enhances root skewing in Arabidopsis thaliana

et al. 2019

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“…Strigolactones and their derivatives were recently defined as novel phytohormones that play important roles in shoot and root growth. In particular, Strigolactones and their derivatives promote the elongation of primary roots and adventitious roots, while repressing lateral root formation (Sun et al, 2016). Also, it should be noted that hormonal crosstalk is essential for plant growth and development.…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity

White²,

et al. 2017

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The rhizosphere is arguably the most complex microbial habitat on earth, comprising an integrated network of plant roots, soil and a diverse microbial consortium of bacteria, archaea, viruses, and microeukaryotes. Understanding, predicting and controlling the structure and function of the rhizosphere will allow us to harness plantmicrobe interactions and other rhizosphere activities as a means to increase or restore plant ecosystem productivity, improve plant responses to a wide range of environmental perturbations, and mitigate effects of climate change by designing ecosystems for longterm soil carbon storage. Here, we review critical knowledge gaps in rhizosphere 2 science, and how mechanistic understanding of rhizosphere interactions can be leveraged in rhizosphere engineering efforts with the goal of maintaining sustainable plant ecosystem services for food and bioenergy production in an ever changing global climate.

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“…Before this, SLs had already been known to stimulate germination of parasitic plant seeds [ 3 ] and to promote the interaction with arbuscular mycorrhizal fungi (AMF) [ 4 ]. It has become clear that SLs not only play a role in the shaping of shoot architecture in different species [ 5 ], but also in root development, as well as in promoting nodulation in Pisum sativum L. [ 6 ], and also in leaf senescence [ 7 ]. On top of this, SLs also appear to be integral parts of the plant responses to biotic and abiotic stresses.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Root Development and Architecture by Strigolactones under Optimal and Nutrient Deficiency Conditions

Marzec

Melzer

2018

IJMS

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Strigolactones (SLs) constitute a group of plant hormones which are involved in multiple aspects of plant growth and development. Beside their role in shoot and root development and plant architecture in general, SLs are also involved in plant responses to nutrient deficiency by promoting interactions with symbiotic organisms and via promotion of root elongation. Recent observations on the cross talk between SLs and other hormones demonstrate that the inhibition of adventitious root formation by ethylene is independent of SLs. Additionally, it was shown that root exposure to SLs leads to the accumulation of secondary metabolites, such as flavonols or antioxidants. These data suggest pleiotropic effects of SLs, that influence root development. The discovery that the commonly used synthetic SL analogue racGR24 might also mimic the function of other plant growth regulators, such as karrikins, has led us to consider the previously published publications under the new aspects. This review summarizes present knowledge about the function of SLs in shaping root systems under optimal and nutrient deficiency conditions. Results which appear inconsistent with the various aspects of root development are singled out.

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The role of strigolactones in root development

Cited by 52 publications

References 27 publications

Impairment in karrikin but not strigolactone sensing enhances root skewing in Arabidopsis thaliana

Impairment in karrikin but not strigolactone sensing enhances root skewing in Arabidopsis thaliana

Rhizosphere engineering: Enhancing sustainable plant ecosystem productivity

Regulation of Root Development and Architecture by Strigolactones under Optimal and Nutrient Deficiency Conditions

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