The detection of endogenous 2’-deoxymugineic acid in olives (<i>Olea europaea</i> L.) indicates the biosynthesis of mugineic acid family phytosiderophores in non-graminaceous plants

Suzuki, Motofumi; Nozoye, Tomoko; Nagasaka, Seiji; Nakanishi, Hiromi; Nishizawa, Naoko K.; Mori, Satoshi

doi:10.1080/00380768.2016.1230724

Cited by 27 publications

(16 citation statements)

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“…Xiong et al (2013) reported that DMA secreted by intercropped maize was detected in peanut (Arachis hypogaea L.) roots in the same pot, and AhYSL1 expressed in the root epidermis showed transport activity for DMA-Fe in yeast. Recently, studies have implied the secretion of PS from tomato and grapevine, and the presence of endogenous DMA in the leaves and xylem of olive plants (Suzuki et al 2016;Astolfi et al 2020;Marastoni et al 2020). Although the dependence of this on the Fe nutritional status has not been proven, these findings suggest that dicots also utilize exogenous and endogenous PS for the uptake and translocation of Fe.…”

Section: Discussionmentioning

confidence: 99%

A synthetic phytosiderophore analog, proline-2′-deoxymugineic acid, is efficiently utilized by dicots

et al. 2021

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Purpose Phytosiderophores (PS) from grasses solubilize sparingly soluble iron (Fe), and the resultant PS-Fe is an Fe source even for dicots. Recently, the synthetic PS proline-2′-deoxymugineic acid (PDMA) has been developed as a moderately biodegradable Fe fertilizer for grasses. We aimed to investigate whether PDMA-Fe is also a good Fe source for dicots. Methods The availability of PDMA-Fe to cucumber was evaluated in a calcareous substrate and hydroponic cultures at pH 7.0–9.0 by determining chlorophyll level, PSII activity, and Fe uptake. EDDHA-Fe, EDTA-Fe, and citrate-Fe were used as controls. The reducibility of Fe chelates by roots was measured to determine the mechanism underlying differences in availability. Expressions of Fe deficiency-inducible genes were analyzed to estimate the Fe status in plants. Results The application of PDMA-Fe and EDDHA-Fe to a calcareous substrate reduced Fe-deficient chlorosis to a similar extent; however, the shoot Fe concentration was higher in the PDMA-Fe treatment. In the hydroponic culture, the availability of PDMA-Fe was higher than that of the other chelates at all pH levels, and this was confirmed by higher PSII activity and lower expression of Fe deficiency-inducible genes. The reducibility assay revealed that the reduction level of PDMA-Fe was greater than that of EDTA-Fe and citrate-Fe under alkaline pH. Conclusions PDMA-Fe is utilized by cucumber roots more efficiently than traditional synthetic chelates in both calcareous substrate and hydroponic cultures. The higher availability of PDMA-Fe may be attributed to its higher reducibility. Our findings suggest that PDMA-Fe could be a good Fe fertilizer for dicots.

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Section: Discussionmentioning

confidence: 99%

A synthetic phytosiderophore analog, proline-2′-deoxymugineic acid, is efficiently utilized by dicots

et al. 2021

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“…These results seem to indicate that the secretion of phytosiderophores as a function of the plant’s Fe status is similar in both herbaceous and woody Strategy I plants. Interestingly, the phytosiderophore 2′-deoxymugineic acid was identified in the leaves of another tree species, olive, at levels seemingly independent of its Fe status 64 .…”

Section: Discussionmentioning

confidence: 99%

Changes in physiological activities and root exudation profile of two grapevine rootstocks reveal common and specific strategies for Fe acquisition

Marastoni

Lucini

Miras-Moreno

et al. 2020

Sci Rep

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In several cultivation areas, grapevine can suffer from Fe chlorosis due to the calcareous and alkaline nature of soils. This plant species has been described to cope with Fe deficiency by activating Strategy I mechanisms, hence increasing root H+ extrusion and ferric-chelate reductase activity. The degree of tolerance exhibited by the rootstocks has been reported to depend on both reactions, but to date, little emphasis has been given to the role played by root exudate extrusion. We studied the behaviour of two hydroponically-grown, tolerant grapevine rootstocks (Ramsey and 140R) in response to Fe deficiency. Under these experimental conditions, the two varieties displayed differences in their ability to modulate morpho-physiological parameters, root acidification and ferric chelate reductase activity. The metabolic profiling of root exudates revealed common strategies for Fe acquisition, including ones targeted at reducing microbial competition for this micronutrient by limiting the exudation of amino acids and sugars and increasing instead that of Fe(III)-reducing compounds. Other modifications in exudate composition hint that the two rootstocks cope with Fe shortage via specific adjustments of their exudation patterns. Furthermore, the presence of 3-hydroxymugenic acid in these compounds suggests that the responses of grapevine to Fe availability are rather diverse and much more complex than those usually described for Strategy I plants.

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“…While secretion of phenolic compounds is part of the original Strategy I concept (Römheld & Marschner, ), the importance of the secretion of iron‐mobilizing compounds was underestimated for decades due to the fact that mobilization of iron by root exudates is particularly important under alkaline conditions (Sisó‐Terraza et al ., ; Rajniak et al ., ; Tsai et al ., ). Moreover, peanut plants (Strategy I) were found to absorb Fe 3+ –PS complexes generated by PS secreted from neighboring maize plants (Xiong et al ., ), and mugineic acid family PS were detected in olives (Suzuki et al ., ), suggesting that nongraminaceous plants too can benefit from the PS system conceptually confined to grasses. It should be mentioned that in contrast to PS, iron‐mobilizing compounds secreted by Strategy I plants such as flavins or catechols possess reductive properties, thus providing an additional source of electrons beside enzymatic reduction via FRO2 or its orthologs in addition to their iron‐chelating properties.…”

Section: A Gene Network Controlling Iron Uptake and Homeostasismentioning

confidence: 99%

Iron acquisition strategies in land plants: not so different after all

Grillet

Schmidt

2019

New Phytologist

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Summary Due to its ability to accept and donate electrons, iron (Fe) is an indispensable component of electron transport chains and a cofactor in many vital enzymes. Except for waterlogged conditions, under which the lack of oxygen prevents oxidation and precipitation of iron as Fe3+ hydroxides, the availability of iron in soils is generally far below the plant's demand for optimal growth. Plants have evolved two phylogenetically separated and elaborately regulated strategies to mobilize iron from the soil, featuring mechanisms which are thought to be mutually exclusive. However, recent studies uncovered several shared components of the two strategies, questioning the validity of the concept of mutual exclusivity. Here, we use publicly available data obtained from the model species rice (Oryza sativa) to unveil similarities and incongruities between co‐expression networks derived from transcriptomic profiling of iron‐deficient rice and Arabidopsis plants. This approach revealed striking similarities in the topographies of the resulting co‐expression networks with relatively minor deviations in the molecular attributes of the comprised genes, which nonetheless lead to different physiological functions. The analysis also discovered several novel players that are possibly involved in the regulation plant adaptation to iron deficiency.

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The detection of endogenous 2’-deoxymugineic acid in olives (Olea europaea L.) indicates the biosynthesis of mugineic acid family phytosiderophores in non-graminaceous plants

Abstract: (2016) The detection of endogenous 2'-deoxymugineic acid in olives (Oleaeuropaea L.) indicates the biosynthesis of mugineic acid family phytosiderophores in non-graminaceous plants,

Cited by 27 publications

References 60 publications

A synthetic phytosiderophore analog, proline-2′-deoxymugineic acid, is efficiently utilized by dicots

A synthetic phytosiderophore analog, proline-2′-deoxymugineic acid, is efficiently utilized by dicots

Changes in physiological activities and root exudation profile of two grapevine rootstocks reveal common and specific strategies for Fe acquisition

Iron acquisition strategies in land plants: not so different after all

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