The Magnesium Transporter MGT10 Is Essential for Chloroplast Development and Photosynthesis in Arabidopsis thaliana

Sun, Yuena; Yang, Runan; Li, Legong; Huang, Jirong

doi:10.1016/j.molp.2017.09.017

Cited by 45 publications

(36 citation statements)

References 12 publications

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“…MGT10 is localized in the chloroplast envelope, and is strongly expressed in the rosette and cauline leaves, indicating its possible function in Mg 2+ translocation into chloroplasts ( Drummond et al, 2006 ). Indeed, two recent studies confirmed that mutant plants lacking MGT10 show defects in chloroplast development and plant photosynthesis ( Liang et al, 2017 ; Sun et al, 2017 ). In rice, OsMGT1 is localized to the plasma membrane and its rapid up-regulation upon Al 3+ stress confers Al 3+ tolerance on rice plants as a result of enhanced Mg 2+ uptake ( Chen et al, 2012 ).…”

Section: Introductionmentioning

confidence: 94%

Magnesium Transporter MGT6 Plays an Essential Role in Maintaining Magnesium Homeostasis and Regulating High Magnesium Tolerance in Arabidopsis

et al. 2018

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Magnesium (Mg) is one of the essential nutrients for all living organisms. Plants acquire Mg from the environment and distribute within their bodies in the ionic form via Mg2+-permeable transporters. In Arabidopsis, the plasma membrane-localized magnesium transporter MGT6 mediates Mg2+ uptake under Mg-limited conditions, and therefore is important for the plant adaptation to low-Mg environment. In this study, we further assessed the physiological function of MGT6 using a knockout T-DNA insertional mutant allele. We found that MGT6 was required for normal plant growth during various developmental stages when the environmental Mg2+ was low. Interestingly, in addition to the hypersensitivity to Mg2+ limitation, mgt6 mutants displayed dramatic growth defects when external Mg2+ was in excess. Compared with wild-type plants, mgt6 mutants generally contained less Mg2+ under both low and high external Mg2+ conditions. Reciprocal grafting experiments further underpinned a role of MGT6 in a shoot-based mechanism for detoxifying excessive Mg2+ in the environment. Moreover, we found that mgt6 mgt7 double mutant showed more severe phenotypes compared with single mutants under both low- and high-Mg2+ stress conditions, suggesting that these two MGT-type transporters play an additive role in controlling plant Mg2+ homeostasis under a wide range of external Mg2+ concentrations.

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Section: Introductionmentioning

confidence: 94%

Magnesium Transporter MGT6 Plays an Essential Role in Maintaining Magnesium Homeostasis and Regulating High Magnesium Tolerance in Arabidopsis

et al. 2018

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“…Magnesium (Mg 2+ ) acts as a cofactor for more than 300 enzymes that are involved in a wide range of fundamental biochemical processes (Sun et al, 2017). In this concern Dias et al (2017) found that both of Mg concentration and light levels affected gas exchange.…”

Section: Discussionmentioning

confidence: 99%

Raising the Efficiency of some Ornamental Plants to Get Rid of Formaldehyde

Koriesh¹

2018

HJSC

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Two experiments were carried out in the Horticulture Department, Faculty of Agriculture, Suez Canal University on Schefflera, Dodonaea and Cordyline plants during the successive seasons from 2014 to 2017. The objective was to study the effect of nitrogen fertilization at 100, 150 and 200 ppm interacted with magnesium at 50, 75 and 100 ppm with other nutrients on increasing the efficiency of plants to reduce pollutants and raising efficiency in reducing formaldehyde from closed chamber. The results showed that the best treatments were the plants fertilized with 200 ppm N and 75 ppm Mg for formaldehyde reduction using by Schefflera actinophylla, Cordyline terminalis and Dodonaea viscosa. The rate of reduction in these treatments over control ranged from 350%-725% for Schefflera, 275%-630% for Cordyline and 300%-400% for Dodonaea, respectively.

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“…After K + , Mg 2+ is the second most abundant cation in algae and land plants, since it is a component of chlorophyll, cofactor of enzymes, and is important for thylakoid membrane organization [ 129 , 130 ]. In A. thaliana , one member of the MGT bacterial CorA Mg 2+ transporter family (also known as MRS2 based on similarity to yeast MRS2) named MRS2-11/MGT10 was localized to the chloroplast envelope [ 131 – 133 ], where it forms large complexes with a composition that may differ from those in bacteria [ 132 ]. Initially, a role in Mg 2+ uptake was demonstrated in yeast complementation experiments as well as using overexpressing mutants [ 131 ].…”

Section: Chloroplast Ion Transportmentioning

confidence: 99%

“…Initially, a role in Mg 2+ uptake was demonstrated in yeast complementation experiments as well as using overexpressing mutants [ 131 ]. However, based on the elevated Mg 2+ content of leaves as well as of chloroplasts isolated from mgt10 mutants as compared to the wild-type plants, a function in the export of Mg 2+ from the chloroplast was suggested [ 133 ]. Mutant analyses also brought evidence for the importance of MGT10 for optimal chloroplast development and photosynthesis [ 132 , 133 ].…”

Section: Chloroplast Ion Transportmentioning

confidence: 99%

Ion and metabolite transport in the chloroplast of algae: lessons from land plants

Marchand

Heydarizadeh

Schoefs

et al. 2018

Cell. Mol. Life Sci.

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Chloroplasts are endosymbiotic organelles and play crucial roles in energy supply and metabolism of eukaryotic photosynthetic organisms (algae and land plants). They harbor channels and transporters in the envelope and thylakoid membranes, mediating the exchange of ions and metabolites with the cytosol and the chloroplast stroma and between the different chloroplast subcompartments. In secondarily evolved algae, three or four envelope membranes surround the chloroplast, making more complex the exchange of ions and metabolites. Despite the importance of transport proteins for the optimal functioning of the chloroplast in algae, and that many land plant homologues have been predicted, experimental evidence and molecular characterization are missing in most cases. Here, we provide an overview of the current knowledge about ion and metabolite transport in the chloroplast from algae. The main aspects reviewed are localization and activity of the transport proteins from algae and/or of homologues from other organisms including land plants. Most chloroplast transporters were identified in the green alga Chlamydomonas reinhardtii, reside in the envelope and participate in carbon acquisition and metabolism. Only a few identified algal transporters are located in the thylakoid membrane and play role in ion transport. The presence of genes for putative transporters in green algae, red algae, diatoms, glaucophytes and cryptophytes is discussed, and roles in the chloroplast are suggested. A deep knowledge in this field is required because algae represent a potential source of biomass and valuable metabolites for industry, medicine and agriculture.Electronic supplementary materialThe online version of this article (10.1007/s00018-018-2793-0) contains supplementary material, which is available to authorized users.

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The Magnesium Transporter MGT10 Is Essential for Chloroplast Development and Photosynthesis in Arabidopsis thaliana

Cited by 45 publications

References 12 publications

Magnesium Transporter MGT6 Plays an Essential Role in Maintaining Magnesium Homeostasis and Regulating High Magnesium Tolerance in Arabidopsis

Magnesium Transporter MGT6 Plays an Essential Role in Maintaining Magnesium Homeostasis and Regulating High Magnesium Tolerance in Arabidopsis

Raising the Efficiency of some Ornamental Plants to Get Rid of Formaldehyde

Ion and metabolite transport in the chloroplast of algae: lessons from land plants

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