Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Zaid, H.; Morabet, Rachida El; Diem, Hoang Gia; Arahou, Moustapha

doi:10.1093/aob/mcg186

Cited by 28 publications

(28 citation statements)

References 23 publications

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“…Shin and Schachtman (2004), and later Jung et al (2009), demonstrated that ethylene signaling plays a significant role in plant response to stress caused by K deficiency inducing ethylene production, and this in turn affects formation of ROS in the root hair differentiation zone, induces the expression of HAK5 (high-affinity transporter), thus changing root morphology and plant tolerance to nutrient deprivation stress (Shin and Schachtman, 2004). However, this fact was not so certain a few years ago (Zaid et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Chromosomal localization of selected SCARs converted from new RAPD, ISSR and R-ISSR markers linked to rye (Secale cereale L.) tolerance to nutrient deprivation stress identified using bulk segregant analysis

Smolik¹

2013

Electron. J. Biotechnol.

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Background: An adaptive mechanism in plant roots is initiated in the event of nitrogen and potassium deficiency, and it facilitates the active uptake of these elements in order to ensure plant growth and survival in stress conditions. Signaling and transduction of signals in response to changing nitrogen and potassium concentrations is a complex process, affected by interactions between various gene expression products, and often subjected to modifications. Results: In order to identify genotypic differences between phenotypes of two populations of recombinant inbred rye lines (153/79-1 x Ot1-3 and Ot0-6 x Ot1-3) in response to nutrition stress caused by nitrogen and potassium deficiency at the seedling stage, bulk segregant analysis was utilized. Identification of genotypic differences between and within pooled DNA samples involved 424 RAPD, 120 ISSR primers and 50 combinations of R-ISSR. Identified markers were sequenced and converted to SCAR, attributing to them unique ESTs annotations, and chromosomal ones to selected localizations. Significant relationships with the examined trait were described for nine and eight RAPD markers, four and five ISSR, one and three R-ISSR markers for population 153/79-1 x Ot1-3 and Ot0-6 x Ot1-3, respectively. Sequences identified for the rye genome were characterized by a uniqueness and a similarity to the sequence of aquaporin PIP1, a gene encoding protein related to the function of the transcription factor in plant response to iron deficiency and the putative ethylene-responsive transcription factor, cytosolic acetyl-CoA carboxylase, HvHKT1 transporter, as well as HCBT proteins. Conclusion: Identified molecular markers differentiating rye genotypes of extreme response of root system on nitrogen and potassium deficiency play a significant role in systemic plant response to stress, including stress caused by nitrogen and potassium deficiency. They may constitute a system facilitating selection, and together with the material they are described in, they may be a starting point for research on mechanisms of sensing and transduction of signal across the plant.

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Section: Discussionmentioning

confidence: 99%

Chromosomal localization of selected SCARs converted from new RAPD, ISSR and R-ISSR markers linked to rye (Secale cereale L.) tolerance to nutrient deprivation stress identified using bulk segregant analysis

Smolik¹

2013

Electron. J. Biotechnol.

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“…Until recently, the involvement of ethylene in P deficiency has been limited to its role in the regulation of morphological responses, like the inhibition of the growth of the main root and the formation of lateral roots, proteoid roots and root hairs [66,[91][92][93][94][95][96]. Nowadays, however, there is evidence that ethylene also plays an important role in the regulation of physiological responses to P deficiency, as is the case with Fe deficiency [5,69,70,97,98].…”

Section: Hormones and Signaling Substances In The Regulation Of Fe Anmentioning

confidence: 99%

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

et al. 2018

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This review deals with two essential plant mineral nutrients, iron (Fe) and phosphorus (P); the acquisition of both has important environmental and economic implications. Both elements are abundant in soils but are scarcely available to plants. To prevent deficiency, dicot plants develop physiological and morphological responses in their roots to specifically acquire Fe or P. Hormones and signalling substances, like ethylene, auxin and nitric oxide (NO), are involved in the activation of nutrient-deficiency responses. The existence of common inducers suggests that they must act in conjunction with nutrient-specific signals in order to develop nutrient-specific deficiency responses. There is evidence suggesting that P-or Fe-related phloem signals could interact with ethylene and NO to confer specificity to the responses to Fe-or P-deficiency, avoiding their induction when ethylene and NO increase due to other nutrient deficiency or stress. The mechanisms responsible for such interaction are not clearly determined, and thus, the regulatory networks that allow or prevent cross talk between P and Fe deficiency responses remain obscure. Here, fragmented information is drawn together to provide a clearer overview of the mechanisms and molecular players involved in the regulation of the responses to Fe or P deficiency and their interactions.

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“…Results on white lupin indicate that it has no impact on clusterroot formation [29], while in Casuarina glauca inhibition of ethylene biosynthesis results in an inhibition of Fe-deficiency-induced cluster roots [45]. Ethylene may play a role in controlling the length of the cluster-root rootlets, since low ethylene concentrations inhibit lateral root initiation and elongation [46].…”

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

170

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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Does Ethylene Mediate Cluster Root Formation under Iron Deficiency?

Cited by 28 publications

References 23 publications

Chromosomal localization of selected SCARs converted from new RAPD, ISSR and R-ISSR markers linked to rye (Secale cereale L.) tolerance to nutrient deprivation stress identified using bulk segregant analysis

Chromosomal localization of selected SCARs converted from new RAPD, ISSR and R-ISSR markers linked to rye (Secale cereale L.) tolerance to nutrient deprivation stress identified using bulk segregant analysis

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

Plant adaptations to severely phosphorus-impoverished soils

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